CN108439982A - A kind of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material and preparation method thereof - Google Patents
A kind of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material and preparation method thereof Download PDFInfo
- Publication number
- CN108439982A CN108439982A CN201810454224.8A CN201810454224A CN108439982A CN 108439982 A CN108439982 A CN 108439982A CN 201810454224 A CN201810454224 A CN 201810454224A CN 108439982 A CN108439982 A CN 108439982A
- Authority
- CN
- China
- Prior art keywords
- phase
- spinel
- powder
- temperature coefficient
- negative temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
- C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
- C04B2235/3267—MnO2
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Abstract
The present invention provides a kind of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic materials, are combined by two phase material, and a phase is Perovskite Phase or the Perovskite Phase of doping, and another phase is Spinel or the Spinel of doping；It is the mixed uniformly transition interlayer of two-phase powder at two-phase interface；The Spinel or the Spinel of doping and the Perovskite Phase or the Perovskite Phase volume ratio of doping are 1:9‑9:1.The molecular formula of the Spinel oxide is AxB2‑xO4, wherein A is one or more in Al, Ni, Co, Fe, and B is one or more in Mn, Mg, Ti, 0.4≤x≤1.5；The molecular formula of the Perovskite Phase oxide is LaCr1‑yByO3, wherein B is one or more of Fe, Co, Mn, 0≤y≤0.8.The axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material of the present invention is combined by two phase material, and resistance change meets parallel resistance changing rule, and the resistance value and calculated value of measurement are almost the same；It can be effectively reduced material resistance value and the variation of B values is small, stability of material is high.
Description
Technical field
The present invention relates to negative tempperature coefficient thermistor technical fields, and in particular to a kind of axial composite-rotor negative temperature coefficient heat
Quick resistor ceramic material and preparation method thereof.
Background technology
Negative temperature coefficient（NTC）Thermistor refers to the resistance that resistance value declines with temperature rise.NTC thermistor is made pottery
Ceramic material is due to having many advantages, such as that sensibility is high, temperature measurement accuracy is high, interchangeability is good, cheap and be widely used in thermometric, control
Temperature, temperature-compensating and inhibition surge current etc., are the electronic components with tremendous expansion potentiality.With science and technology and need
The market demand of the development asked, NTC temperature sensors increasingly increases severely.NTC thermal sensitive ceramic material major parameters include：（1）ρ25℃,
Refer to the resistivity at 25 DEG C；（2）Material constant B describes a parameter of thermistor physical characteristic, and B values are bigger, sensitivity
It is higher.With the difference of application field, different ρ is needed25℃It is combined with B values.Such as in the NTC heat for inhibiting surge current to use
Quick resistance, it is desirable that there is the high B values of low-resistivity；The thermistor used at high temperature requires the high B values of high resistivity.Tradition
NTC material be usually that the spinel oxides that are made of elements such as Mn, Ni, Co, Fe, Cu form, such as Cu-Ni-Mn-
The systems such as O, Fe-Ni-Mn-O, Zn-Ni-Mn-O.The relationship of the electricalresistivityρ and temperature T of spinel-type NTC thermo-sensitive materials meet
Arrehenius equations：ρ=ρ0The B values of exp (B/T), this kind of material are usually increased with the raising of resistivity, otherwise also
So.It is difficult to the NTC material of acquisition low-resistivity, high B values.Previous research is mainly improved from the composition of material system,
For example Cu is mixed in spinel, resistivity can be greatly lowered, but the decline of B values and stability can be caused simultaneously；Again
Highly conductor phase is introduced such as in spinel, and to carry out traditional two-phase compound, i.e. powder forming and sintering after evenly mixing, can be with
Its resistivity is substantially reduced, but B values also can be reduced and then simultaneously.So far, the same of resistance value can be effectively reduced by not reporting
When and ensure the method that B values vary less and stability is good.Therefore exploring new method is reducing the same of thermo-sensitive material resistivity
When keep B values it is constant, and then prepare high B values, low-resistivity, high stability NTC material change be even more important.
Invention content
The problem of for the NTC material and preparation method for lacking high B values, low-resistivity, high stability at present, the present invention carries
For a kind of preparation method of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material, material resistance value can be effectively reduced and B values change
It is small, stability of material is high.
To achieve the above object, the present invention adopts the following technical scheme that.
A kind of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material, is combined by two phase material, and a phase is Perovskite Phase
Or the Perovskite Phase of doping, another phase are Spinel or the Spinel of doping；It is uniformly mixed for two-phase powder at two-phase interface
The transition interlayer of conjunction；The Spinel or the Spinel of doping and the Perovskite Phase or the Perovskite Phase volume ratio of doping
It is 1:9-9:1；Preferably 1:9-1:1.
Molecular formula as the preferred Spinel oxide is AxB3-xO4, wherein A is one kind in Al, Ni, Co, Fe
Or it is a variety of, B is one or more in Mn, Mg, Ti, 0.4≤x≤1.5；The molecular formula of the Perovskite Phase oxide is
LaCr1-yByO3, wherein B is one or more of Fe, Co, Mn, 0≤y≤0.8.
Preferably, above-mentioned axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material it is compound by Spinel and Perovskite Phase and
At.
The axial composite-rotor negative temperature coefficient thermal-sensitive ceramic materialρ 25℃For 124-17149 Ω cm ± 2%, B25/50For
3365-3393K±1.5%；In 125 DEG C of aging 1000h resistance change rate be 0.41-0.52%.
The preparation method of above-mentioned axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material, includes the following steps：
（1）By Spinel AxB3-xO4Or Perovskite Phase LaCr1-yByO3Middle atom molar ratio weighs each oxide and carries out wet-milling,
Obtain two kinds of slurries；
（2）By step（1）In slurry be separately dried, then grind to obtain two kinds of powders；
（3）By step（2）In two kinds of powders calcine respectively, obtain Spinel AxB3-xO4With Perovskite Phase LaCr1-yByO3Powder
Body；Then it is granulated with binder, obtains epigranular, the two-phase powder body material of good fluidity；
（4）By step（3）In powder body material be put into mold according to certain volume ratio, be put into two-phase in two-phase powder interface
Uniform mixed powder is then pressed into block materials as transition zone；
（5）By step（4）In block materials be first warming up to 500 DEG C, 1300-1450 DEG C is risen to after heat preservation again, is then cooled down again
It is kept the temperature to 1200-1300 DEG C, furnace cooling obtains axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material.
The mold is cylinder-like structure, and both ends open is provided with dismountable activity in inner cavity every valve；It is described activity every
Valve is made of the rectangular partition of two panels along the connection of long side shaft；The axle center of the shaft is located at the mold cross section center of circle；It is described
The long side of partition is identical as mold height, and the short side of the partition is identical as mold inside radius.In use, by activity every valve
Two panels partition is rotated centered on shaft, to which dies cavity to be separated into the two spaces of different volumes, is respectively charged into two-phase
Material and transition zone then take out activity every valve, suppress the material in inner cavity.
Step（1）In, the wet-milling is using agate ball as ball-milling medium, using absolute ethyl alcohol as decentralized medium；Agate ball:It is former
Material:Absolute ethyl alcohol mass ratio is 2.5:1:1；Preferably, wet-milling is along counterclockwise alternately, along interval time counterclockwise
30min；The wet-milling time is 10-24h.
Step（2）Middle drying temperature is 80-100 DEG C；Milling time is 1h.
Step（3）Middle calcination temperature is in 900-1100 DEG C；Calcination time is 1-3h.
Step（3）In, further include by A before granulationxB3-xO4And LaCr1-yByO3Grinding, obtains the mistake of even-grained powder
Journey.The AxB3-xO4D50For 0.128-1.763 μm and LaCr1-yByO3D50It is 0.247-1.836 μm.The D50Refer to tiring out
Meter grain size volume percentile reaches grain size corresponding when 50%.
Step（3）In, the binder of granulation is preferably PVA；The addition of PVA is the 1-3.5wt% of powder.
Step（4）In, the Perovskite Phase and Spinel of Perovskite Phase or doping or doping in the uniform mixed powder of two-phase
Spinel volume ratio be 1:1.
Step（4）In, preferred preparation method is that the disk of Φ 10mm, dwell time are pressed under the pressure of 10Mpa
For 3min, then by the disk under the pressure of 350Mpa isostatic cool pressing 4min to get.
Step（5）In, the first time heating rate is 1-5 DEG C/min；Second of heating rate is 5-10 DEG C/min；Institute
It is 1-5min to state temperature fall time；The first time soaking time is 2-6h, and second of soaking time is 2-15h.
The present invention has the following advantages：
The axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material of the present invention is combined by two phase material, and resistance change meets
Parallel resistance changing rule, i.e. 1/RAnd=1/R1+1/R2, the resistance value and calculated value of measurement be almost the same.
According to the principle that Ohm's law and resistor coupled in parallel reduce, it is multiple to devise completely new NTC material complex form-axial direction
It closes, B values can be kept almost unchanged while effectively reducing resistance value, the NTC thermistors to preparing low-resistance, high B values have really
The directive significance on border：In spinelle region, Spinel is conducting, and Perovskite Phase is not turned on, and resistivity is by sharp brilliant
Graphite/oxide determines；In perovskite region, Perovskite Phase is conducting, and resistivity is determined by Perovskite Phase.Therefore in axial direction
In compound NTC thermistors, the resistance for being equivalent to two kinds of structures forms a parallel circuit, by adjusting the body of two phase material
Product ensures that B values are almost unchanged than can effectively reduce material resistance value.
In the present invention, the spinelle and perovskite oxide itself of use have very high electrical stability, two-phase interface
Place is also because the presence of transition zone has good phase stability and high thermal expansion matching, therefore axial composite-rotor ceramics
The stable electrical properties of material.
Consistency is high：To avoid crystal grain in high-temperature sintering process from growing up, its electrical property is influenced, using two-step sintering method, i.e.,
Fast cooling passes through this control to temperature to certain temperature in the low temperature long-time heat preservation after being warming up to maximum sintering temperature
System keeps grain boundary decision to be in active state, realizes under the premise of crystal grain is not grown up and complete while inhibiting crystal boundary migration
The purpose of sintering；In addition from the angle of environmental protection, which can be effectively energy saving.
Description of the drawings
Fig. 1 is mold schematic diagram；
Fig. 2 is mold cross-sectional；
Fig. 3 is the negative temperature coefficient thermal-sensitive ceramic material SEM pictures of embodiment 1；
Wherein, 1 is mold, and 2 be activity every valve, and 3 be partition, and 4 be shaft.
Specific implementation mode
With reference to embodiment and attached drawing, the present invention will be further described, but the present invention is not limited by following embodiments
System.
Embodiment 1
（1）First to analyze pure Ni2O3、MnO2、La2O3、Cr2O3、Fe2O3For raw material, by Spinel NiMn2O4And perovskite
Phase LaCr0.7Fe0.3O3Middle atom molar ratio weighs each oxide and is placed in agate jar respectively, is situated between by ball milling of agate ball
Matter, absolute ethyl alcohol are decentralized medium, and wet-milling 15h, controlling each material mass ratio in ball grinder is：Agate ball:Raw material:Absolute ethyl alcohol
=2.5:1:1, ball milling is along counterclockwise alternately, suitable interval time 30min counterclockwise obtains two kinds of slurries；
（2）By step（1）In slurry be separately dried in 80 DEG C, then grind 1h obtain two kinds of powders；
（3）By step（2）In spinel components and perovskite component two kinds of powders respectively at 900 DEG C and 1000 DEG C calcine,
Obtain Spinel NiMn2O4With Perovskite Phase LaCr0.7Fe0.3O3Powder；It grinds 4h respectively in agate mortar, obtains
NiMn2O4With Perovskite Phase LaCr0.7Fe0.3O3Powder granularity（D50）Respectively 0.984 μm and 1.124 μm, then it is with PVA again
Binder is granulated, and the addition of PVA is the 3wt% of powder, obtains epigranular, good fluidity, the two-phase of good moldability
Powder body material；
（4）Mold is placed on tabletting pedestal, by mold（1）Activity every valve（2）Two panels partition（3）With shaft（4）Centered on
Rotation, it is 1 that dies cavity, which is separated into volume ratio,:1 two spaces, according to volume ratio V（NiMn2O4）：V
(LaCr0.7Fe0.3O3)=1:1 is respectively charged into step（3）In two phase material, be put into two-phase in two-phase powder interface and uniformly mix
Close powder（Volume ratio 1:1）As transition zone, suppressed after taking-up activity partition：First it is pre-pressed under the pressure of 10Mpa
The disk of Φ 10mm, dwell time 3min, then by the disk under the pressure of 350Mpa isostatic cool pressing 4min, obtain being molded good
Good axial composite-rotor block materials；
The mold is as depicted in figs. 1 and 2：Mold（1）For cylinder-like structure, both ends open, inner cavity is provided with dismountable work
It moves every valve（2）；The activity is every valve（2）By the rectangular partition of two panels（3）Along long side shaft（4）Connection composition；The shaft
（4）Axle center be located at the mold cross section center of circle；The long side of the partition is identical as mold height, the short side and mold of the partition
Inside radius is identical；
（5）By step（4）In obtained block materials be first warming up to 500 DEG C with the rate of 1 DEG C/min, keep the temperature after 5h again with 10
DEG C/rate of min rises to 1350 DEG C, then it is cooled to 1200 DEG C of heat preservation 10h rapidly in 4min again, furnace cooling obtains axis
To compound negative temperature coefficient thermal-sensitive ceramic material.
Obtained axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material is subjected to electric performance test, electrical parameter isρ 25℃=
785 Ω cm ± 2%, B25/50=3373K±1.5%；The resistance change rate of 125 DEG C of aging 1000h is 0.51%, which is suitable for
Inhibit surge current；Its SEM photograph is as shown in figure 3, no significant defect, consistency are high at two-phase interface.
Embodiment 2
（1）First to analyze pure Ni2O3、MnO2、La2O3、Cr2O3、Fe2O3For raw material, by Spinel NiMn2O4And perovskite
Phase LaCr0.7Fe0.3O3Middle atom molar ratio weighs each oxide and is placed in agate jar respectively, is situated between by ball milling of agate ball
Matter, absolute ethyl alcohol are decentralized medium, and for 24 hours, controlling each material mass ratio in ball grinder is for wet-milling：Agate ball:Material:Absolute ethyl alcohol=
2.5:1:1, ball milling is along counterclockwise alternately, suitable interval time 30min counterclockwise obtains two kinds of slurries；
（2）By step（1）In slurry be separately dried in 80 DEG C, then grind 1h obtain two kinds of powders；
（3）By step（2）In spinel components and perovskite component two kinds of powders respectively at 900 DEG C and 1000 DEG C calcine,
Obtain Spinel NiMn2O4With Perovskite Phase LaCr0.7Fe0.3O3Powder；It grinds 4h respectively in agate mortar, obtains
NiMn2O4With Perovskite Phase LaCr0.7Fe0.3O3Powder granularity（D50）Respectively 0.128 μm and 0.274 μm, then it is with PVA again
Binder is granulated, and the addition of PVA is the 2.4wt% of powder, obtains epigranular, good fluidity, and the two of good moldability
Phase powder body material；
（4）Mold is placed on tabletting pedestal, by mold（1）Activity every valve（2）Two panels partition（3）With shaft（4）Centered on
Rotation, it is 1 that dies cavity, which is separated into volume ratio,:2 two spaces, according to volume ratio V（NiMn2O4）：V
(LaCr0.7Fe0.3O3)=1:2 are packed into step（3）In two phase material, be put into the uniform mixed powder of two-phase in two-phase powder interface
Body（Volume ratio 1:1）As transition zone, suppressed after taking-up activity partition：First Φ is pre-pressed under the pressure of 10Mpa
The disk of 10mm, dwell time 3min, then by the disk under the pressure of 350Mpa isostatic cool pressing 4min, it is good to obtain molding
Axial composite-rotor block materials；Mould structure such as embodiment 1；
（5）By step（4）In obtained block materials be first warming up to 500 DEG C with the rate of 3 DEG C/min, keep the temperature after 4h again with 10
DEG C/rate of min rises to 1400 DEG C, then it is cooled to 1250 DEG C of heat preservation 12h rapidly in 5min again, furnace cooling obtains axis
To compound negative temperature coefficient thermal-sensitive ceramic material.
Obtained axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material is subjected to electric performance test, electrical parameter isρ 25℃=
345 Ω cm ± 2%, B25/50=3365K±1.5%；The resistance change rate of 125 DEG C of aging 1000h is 0.45%, which is suitable for
Inhibit surge current.
Embodiment 3
（1）First to analyze pure Ni2O3、MnO2、La2O3、Cr2O3、Fe2O3For raw material, by Spinel NiMn2O4And perovskite
Phase LaCr0.7Fe0.3O3Middle atom molar ratio weighs each oxide and is placed in agate jar respectively, is situated between by ball milling of agate ball
Matter, absolute ethyl alcohol are decentralized medium, and wet-milling 18h, controlling each material mass ratio in ball grinder is：Agate ball:Material:Absolute ethyl alcohol=
2.5:1:1, ball milling is along counterclockwise alternately, suitable interval time 30min counterclockwise obtains two kinds of slurries；
（2）By step（1）In slurry be separately dried in 80 DEG C, then grind 1h obtain two kinds of powders；
（3）By step（2）In spinel components and perovskite component two kinds of powders respectively at 900 DEG C and 1000 DEG C calcine,
Obtain Spinel NiMn2O4With Perovskite Phase LaCr0.7Fe0.3O3Powder；It grinds 4h respectively in agate mortar, obtains
NiMn2O4With Perovskite Phase LaCr0.7Fe0.3O3Powder granularity（D50）Respectively 0.341 μm and 0.457 μm, then it is with PVA again
Binder is granulated, and the addition of PVA is the 3wt% of powder, obtains epigranular, good fluidity, the two-phase of good moldability
Powder body material；
（4）Mold is placed on tabletting pedestal, by mold（1）Activity every valve（2）Two panels partition（3）With shaft（4）Centered on
Rotation, it is 1 that dies cavity, which is separated into volume ratio,:3 two spaces, according to volume ratio V（NiMn2O4）：V
(LaCr0.7Fe0.3O3)=1:3 are packed into step（3）In two phase material, be put into the uniform mixed powder of two-phase in two-phase powder interface
Body（Volume ratio 1:1）As transition zone, suppressed after taking-up activity partition：First Φ is pre-pressed under the pressure of 10Mpa
The disk of 10mm, dwell time 3min, then by the disk under the pressure of 350Mpa isostatic cool pressing 4min, it is good to obtain molding
Axial composite-rotor block materials；Mould structure such as embodiment 1；
（5）By step（4）In obtained block materials be first warming up to 500 DEG C with the rate of 5 DEG C/min, keep the temperature after 5h again with 10
DEG C/rate of min rises to 1450 DEG C, then it is cooled to 1300 DEG C of heat preservation 12h rapidly in 5min again, furnace cooling obtains axis
To compound negative temperature coefficient thermal-sensitive ceramic material.
Obtained axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material is subjected to electric performance test, electrical parameter isρ 25℃=
128 Ω cm ± 2%, B25/50=3370K±1.5%；The resistance change rate of 125 DEG C of aging 1000h is 0.50%, which is suitable for
Inhibit surge current.
Embodiment 4
（1）First to analyze pure Ni2O3、MnO2、La2O3、Cr2O3For raw material, by Spinel NiMn2O4And Perovskite Phase
LaCr0.7Mn0.3O3Middle atom molar ratio weighs each oxide and is placed in agate jar respectively, using agate ball as ball-milling medium,
Absolute ethyl alcohol is decentralized medium, and for 24 hours, controlling each material mass ratio in ball grinder is for wet-milling：Agate ball:Material:Absolute ethyl alcohol=2.5:
1:1, ball milling is along counterclockwise alternately, suitable interval time 30min counterclockwise obtains two kinds of slurries；
（2）By step（1）In slurry be separately dried in 80 DEG C, then grind 1h obtain two kinds of powders；
（3）By step（2）In spinel components and perovskite component two kinds of powders respectively at 900 DEG C and 950 DEG C calcining, obtain
To Spinel NiMn2O4With Perovskite Phase LaCr0.7Mn0.3O3Powder；It grinds 4h respectively in agate mortar, obtains
NiMn2O4With Perovskite Phase LaCr0.7Mn0.3O3Powder granularity（D50）Respectively 0.223 μm and 0.316 μm, then it is with PVA again
Binder is granulated, and the addition of PVA is the 3wt% of powder, obtains epigranular, good fluidity, the two-phase of good moldability
Powder body material；
（4）Mold is placed on tabletting pedestal, by mold（1）Activity every valve（2）Two panels partition（3）With shaft（4）Centered on
Rotation, it is 1 that dies cavity, which is separated into volume ratio,:3 two spaces, according to volume ratio V（NiMn2O4）：V
(LaCr0.7Fe0.3O3)=1:4 are packed into step（3）In two phase material, be put into the uniform mixed powder of two-phase in two-phase powder interface
Body（Volume ratio 1:1）As transition zone, suppressed after taking-up activity partition：First Φ is pre-pressed under the pressure of 10Mpa
The disk of 10mm, dwell time 3min, then by the disk under the pressure of 350Mpa isostatic cool pressing 4min, it is good to obtain molding
Axial composite-rotor block materials；Mould structure such as embodiment 1；
（5）By step（4）In obtained block materials be first warming up to 500 DEG C with the rate of 5 DEG C/min, keep the temperature after 5h again with 10
DEG C/rate of min rises to 1450 DEG C, then it is cooled to 1300 DEG C of heat preservation 12h rapidly in 5min again, furnace cooling obtains axis
To compound negative temperature coefficient thermal-sensitive ceramic material.
Obtained axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material is subjected to electric performance test, electrical parameter isρ 25℃=
3401 Ω cm ± 2%, B25/50=3387K±1.5%；The resistance change rate of 125 DEG C of aging 1000h is 0.51%, which is applicable in
In inhibition surge current.
Comparative example 1
（1）First to analyze pure Ni2O3、MnO2For raw material, by Spinel NiMn2O4Middle atom molar ratio, weighs each oxide
It is placed in agate jar, is decentralized medium by ball-milling medium, absolute ethyl alcohol of agate ball, wet-milling 12h is controlled each in ball grinder
Material mass ratio is：Agate ball:Material:Absolute ethyl alcohol=2.5:1:1, ball milling be along counterclockwise alternately, along counterclockwise between
Every time 30min, slurry is obtained；
（2）By step（1）In slurry be separately dried in 80 DEG C, then grind 1h obtain powder；
（3）By step（2）In powder in 900 DEG C calcining, obtain Spinel NiMn2O4Powder；It is ground in agate mortar
Grind 4h, obtained NiMn2O4Powder granularity（D50）It is 0.211 μm, is then granulated again by binder of PVA, the addition of PVA
Amount is the 3wt% of powder, obtains epigranular, good fluidity, the Spinel powder body material of good moldability；
（4）By step（3）In obtained powder be pressed into the disk of Φ 10mm under the pressure of 10Mpa, dwell time 3min,
Again by the disk under the pressure of 350Mpa isostatic cool pressing 4min, obtain being molded good Spinel NiMn2O4Block materials；
（5）By step（4）In obtained block materials be first warming up to 500 DEG C with the rate of 5 DEG C/min, keep the temperature after 5h again with 10
DEG C/rate of min rises to 1250 DEG C, then it is cooled to 1100 DEG C of heat preservation 10h rapidly in 5min again, furnace cooling obtains point
Spar phase negative temperature coefficient thermal-sensitive ceramic material.
Obtained Spinel negative temperature coefficient thermal-sensitive ceramic material is subjected to electric performance test, electrical parameter isρ 25℃=
106958 Ω cm ± 2%, B25/50=4477K±1.5%；The resistance change rate of 125 DEG C of aging 1000h is 0.48%.
Comparative example 2
（1）First to analyze pure La2O3、Cr2O3、Fe2O3For raw material, by Perovskite Phase LaCr0.7Fe0.3O3Middle atom molar ratio,
It weighs each oxide to be placed in agate jar, is decentralized medium, wet-milling 12h, control by ball-milling medium, absolute ethyl alcohol of agate ball
Each material mass ratio is in ball grinder processed：Agate ball:Material:Absolute ethyl alcohol=2.5:1:1, ball milling be along counterclockwise alternately into
Row obtains slurry along interval time 30min counterclockwise；
（2）By step（1）In slurry be separately dried in 80 DEG C, then grind 1h obtain powder；
（3）By step（2）In powder in 1000 DEG C calcining, obtain Perovskite Phase LaCr0.7Fe0.3O3Powder；It is ground then at agate
4h is ground in alms bowl, obtained LaCr0.7Fe0.3O3Powder granularity（D50）It is 0.342 μm, is then made again by binder of PVA
Grain, the addition of PVA are the 3wt% of powder, obtain epigranular, good fluidity, the Perovskite Phase powder material of good moldability
Material；
（4）By step（3）In obtained powder be pressed into the disk of Φ 10mm under the pressure of 10Mpa, dwell time 3min,
Again by the disk under the pressure of 350Mpa isostatic cool pressing 4min, obtain being molded good Perovskite Phase LaCr0.7Fe0.3O3Block
Material；
（5）By step（4）In obtained block materials be first warming up to 500 DEG C with the rate of 5 DEG C/min, keep the temperature after 5h again with 10
DEG C/rate of min rises to 1350 DEG C, then it is cooled to 1250 DEG C of heat preservation 10h rapidly in 5min again, furnace cooling obtains calcium
Titanium ore phase negative temperature coefficient thermal-sensitive ceramic material.
Obtained Perovskite Phase negative temperature coefficient thermal-sensitive ceramic material is subjected to electric performance test, electrical parameter isρ 25℃=
871 Ω cm ± 2%, B25/50=3358K±1.5%；The resistance change rate of 125 DEG C of aging 1000h is 0.49%.
Comparative example 3
（1）First to analyze pure La2O3、Cr2O3、Mn2O3For raw material, by Perovskite Phase LaCr0.7Mn0.3O3Middle atom molar ratio,
It weighs each oxide to be placed in agate jar, is decentralized medium, wet-milling 12h, control by ball-milling medium, absolute ethyl alcohol of agate ball
Each material mass ratio is in ball grinder processed：Agate ball:Material:Absolute ethyl alcohol=2.5:1:1, ball milling be along counterclockwise alternately into
Row obtains slurry along interval time 30min counterclockwise；
（2）By step（1）In slurry be separately dried in 80 DEG C, then grind 1h obtain powder；
（3）By step（2）In powder in 1000 DEG C calcining, obtain Perovskite Phase LaCr0.7Mn0.3O3Powder；It is ground then at agate
4h is ground in alms bowl, obtained LaCr0.7Mn0.3O3Powder granularity（D50）It is 0.379 μm, is then made again by binder of PVA
Grain, the addition of PVA are the 3wt% of powder, obtain epigranular, good fluidity, the Perovskite Phase powder material of good moldability
Material；
（4）By step（3）In obtained powder be pressed into the disk of Φ 10mm under the pressure of 10Mpa, dwell time 3min,
Again by the disk under the pressure of 350Mpa isostatic cool pressing 4min, obtain being molded good Perovskite Phase LaCr0.7Mn0.3O3Block
Material；
（5）By step（4）In obtained block materials be first warming up to 500 DEG C with the rate of 5 DEG C/min, keep the temperature after 5h again with 10
DEG C/rate of min rises to 1350 DEG C, then it is cooled to 1250 DEG C of heat preservation 10h rapidly in 5min again, furnace cooling obtains calcium
Titanium ore phase negative temperature coefficient thermal-sensitive ceramic material.
Obtained Perovskite Phase negative temperature coefficient thermal-sensitive ceramic material is subjected to electric performance test, electrical parameter isρ 25℃=
3683 Ω cm ± 2%, B25/50=3191K±1.5%；The resistance change rate of 125 DEG C of aging 1000h is 0.52%.
Claims (10)
1. a kind of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material, which is characterized in that be combined by two phase material, a phase is
Perovskite Phase or the Perovskite Phase of doping, another phase are Spinel or the Spinel of doping；It is two-phase powder at two-phase interface
The mixed uniformly transition interlayer of body；The Spinel or the Spinel of doping and the Perovskite Phase or the perovskite of doping
Phase volume ratio is 1:9-9:1.
2. axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material according to claim 1, which is characterized in that the spinelle
The molecular formula of phase oxide is AxB3-xO4, wherein A is one or more in Al, Ni, Co, Fe, and B is one kind in Mn, Mg, Ti
Or a variety of, 0.4≤x≤1.5；The molecular formula of the Perovskite Phase oxide is LaCr1-yByO3, wherein B is in Fe, Co, Mn
One or more, 0≤y≤0.8.
3. axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material according to claim 1, which is characterized in that itsρ 25°CFor
124-17149 Ω cm ± 2%, B25/50For 3365-3393K ± 1.5%；It is in the resistance change rate of 125 DEG C of aging 1000h
0.41-0.52%。
4. a kind of preparation method of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material as described in claim 1, feature exist
In including the following steps：
（1）By Spinel AxB3-xO4Or Perovskite Phase LaCr1-yByO3Middle atom molar ratio weighs each oxide and carries out wet-milling,
Obtain two kinds of slurries；
（2）By step（1）In slurry be separately dried, then grind to obtain two kinds of powders；
（3）By step（2）In two kinds of powders calcine respectively, obtain Spinel AxB3-xO4With Perovskite Phase LaCr1-yByO3Powder
Body；Then it is granulated with binder, obtains epigranular, the two-phase powder body material of good fluidity；
（4）By step（3）In powder body material be put into mold according to certain volume ratio, be put into two-phase in two-phase powder interface
Uniform mixed powder is then pressed into block materials as transition zone；
（5）By step（4）In block materials be first warming up to 500 DEG C, 1300-1450 DEG C is risen to after heat preservation again, is then cooled down again
It is kept the temperature to 1200-1300 DEG C, furnace cooling obtains axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material.
5. preparation method according to claim 4, which is characterized in that step（1）In, the wet-milling is using agate ball as ball milling
Medium, using absolute ethyl alcohol as decentralized medium；Agate ball:Raw material:Absolute ethyl alcohol mass ratio is 2.5:1:1；The wet-milling time is 10-
24h。
6. preparation method according to claim 4, which is characterized in that step（3）In, further include by A before granulationxB3-xO4With
LaCr1-yByO3Grinding, obtains the process of even-grained powder；The AxB3-xO4D50It is 0.128-1.763 μm；It is described
LaCr1-yByO3D50It is 0.247-1.836 μm.
7. preparation method according to claim 4, which is characterized in that step（3）Middle calcination temperature is in 900-1100 DEG C；
Calcination time is 1-3h.
8. preparation method according to claim 4, which is characterized in that step（3）In, the binder of granulation is PVA；PVA
Addition be powder 1-3.5wt%.
9. preparation method according to claim 4, which is characterized in that step（5）In, the first time heating rate is 1-
5℃/min；Second of heating rate is 5-10 DEG C/min；The temperature fall time is 1-5min；The first time soaking time is
2-6h, second of soaking time are 2-15h.
10. a kind of mold preparing axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material as described in claim 1, feature exist
In the mold is cylinder-like structure, and both ends open, inner cavity is provided with dismountable activity every valve；The activity is every valve by two
The rectangular partition of piece is connected along long side shaft and is formed；The axle center of the shaft is located at the mold cross section center of circle；The partition
Long side is identical as mold height, and the short side of the partition is identical as mold inside radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454224.8A CN108439982B (en) | 2018-05-14 | 2018-05-14 | Axial composite negative temperature coefficient thermal sensitive ceramic material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810454224.8A CN108439982B (en) | 2018-05-14 | 2018-05-14 | Axial composite negative temperature coefficient thermal sensitive ceramic material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108439982A true CN108439982A (en) | 2018-08-24 |
| CN108439982B CN108439982B (en) | 2021-06-15 |
Family
ID=63203204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810454224.8A Active CN108439982B (en) | 2018-05-14 | 2018-05-14 | Axial composite negative temperature coefficient thermal sensitive ceramic material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108439982B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109942285A (en) * | 2019-04-09 | 2019-06-28 | 济南大学 | A kind of in-situ preparation lamellar composite negative temperature coefficient thermal-sensitive ceramic material and preparation method and application |
| CN110054493A (en) * | 2019-03-26 | 2019-07-26 | 济南大学 | A kind of Lanthanum Chromite based perovskite phase and Spinel NTC thermal sensitive ceramic material and preparation method |
| CN110054480A (en) * | 2019-03-26 | 2019-07-26 | 济南大学 | A kind of negative temperature coefficient thermal-sensitive ceramic material and preparation method and application with sandwich structure |
| CN112624740A (en) * | 2020-12-26 | 2021-04-09 | 重庆材料研究院有限公司 | High-entropy NTC thermistor ceramic material and preparation method thereof |
| CN113200735A (en) * | 2021-05-14 | 2021-08-03 | 合肥工业大学 | High-resistivity low-B-value type negative temperature coefficient thermistor material and preparation method thereof |
| CN115536367A (en) * | 2022-09-29 | 2022-12-30 | 肇庆市金龙宝电子有限公司 | High-resistance low-B-value thermistor ceramic body, preparation method and thermistor |
| CN115894026A (en) * | 2022-11-29 | 2023-04-04 | 唐山恭成科技有限公司 | NTC thermistor material with low resistivity and high B value and preparation method thereof |
Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013592A (en) * | 1975-02-19 | 1977-03-22 | Matsushita Electric Industrial Co., Ltd. | High temperature thermistor composition |
| CN87104060A (en) * | 1986-06-03 | 1987-12-16 | 帝国化学工业公司 | Extrusion die |
| JPH11111508A (en) * | 1997-10-01 | 1999-04-23 | Matsushita Electric Ind Co Ltd | Thermistor element, manufacture of the same, and temperature sensor using thermistor element |
| CN1326198A (en) * | 2000-05-25 | 2001-12-12 | 列特龙株式会社 | Spinel ferrite thermal sensitive resistance component with negative temperature coefficient |
| CN1327598A (en) * | 1999-10-25 | 2001-12-19 | 阿尔斯托姆公司 | Improved lightning arrester based on non-linear varistors |
| CN1348192A (en) * | 2000-10-11 | 2002-05-08 | 株式会社村田制作所 | Semiconductor ceramic with negative resistance temperature coefficient and negative temperature coefficient thermistor |
| JP2004286490A (en) * | 2003-03-19 | 2004-10-14 | Ngk Spark Plug Co Ltd | Temperature sensor |
| CN101118793A (en) * | 2007-09-12 | 2008-02-06 | 山东中厦电子科技有限公司 | Low electric resistivity high B values negative temperature coefficient thermistor chip and manufacturing method therefor |
| CN101786861A (en) * | 2009-12-28 | 2010-07-28 | 中国科学院新疆理化技术研究所 | Negative temperature coefficient thermosensitive resistor with high resistance and low B value |
| KR20110047481A (en) * | 2009-10-30 | 2011-05-09 | 전자부품연구원 | An inner oxide electrode material and a multilayer ceramic device having the same |
| CN102211924A (en) * | 2011-04-01 | 2011-10-12 | 中国科学院新疆理化技术研究所 | Preparation method of composite phase negative temperature coefficient thermal sensitive ceramic material |
| CN102971808A (en) * | 2010-06-24 | 2013-03-13 | Tdk株式会社 | Chip thermistor and method of manufacturing same |
| CN103386719A (en) * | 2013-08-09 | 2013-11-13 | 常熟市鹰腾模具配件制造有限公司 | Novel combination mold |
| CN103403938A (en) * | 2011-02-15 | 2013-11-20 | 攀时股份有限公司 | Layer structure and use thereof to form a ceramic layer structure between an interconnect and a cathode of a high-temperature fuel cell |
| CN104124014A (en) * | 2014-01-09 | 2014-10-29 | 华东理工大学 | Double-layer NTC (Negative Temperature Coefficient) thermistor and preparation method thereof |
| CN104700970A (en) * | 2015-03-30 | 2015-06-10 | 东莞理工学院 | Negative temperature coefficient film thermistor, preparation method of negative temperature coefficient film thermistor and adjustment method for resistance value of negative temperature coefficient film thermistor |
| CN204894314U (en) * | 2015-08-04 | 2015-12-23 | 福州诺贝尔福基机电有限公司 | Resin tube preheating cabinet |
| CN105551699A (en) * | 2015-12-24 | 2016-05-04 | 深圳顺络电子股份有限公司 | NTC thermistor and manufacturing method therefor |
| CN106518052A (en) * | 2015-09-10 | 2017-03-22 | 华中科技大学 | Method for preparing fine-grained barium titanate temperature-sensitive ceramic and product thereof |
| CN107056273A (en) * | 2017-05-25 | 2017-08-18 | 中国科学院新疆理化技术研究所 | A kind of double-deck negative tempperature coefficient thermistor and preparation method thereof |
| CN107840462A (en) * | 2017-11-29 | 2018-03-27 | 宁波江北峰尚环保设备有限公司 | A kind of water purifying structure for water purifier |
-
2018
- 2018-05-14 CN CN201810454224.8A patent/CN108439982B/en active Active
Patent Citations (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4013592A (en) * | 1975-02-19 | 1977-03-22 | Matsushita Electric Industrial Co., Ltd. | High temperature thermistor composition |
| CN87104060A (en) * | 1986-06-03 | 1987-12-16 | 帝国化学工业公司 | Extrusion die |
| JPH11111508A (en) * | 1997-10-01 | 1999-04-23 | Matsushita Electric Ind Co Ltd | Thermistor element, manufacture of the same, and temperature sensor using thermistor element |
| CN1327598A (en) * | 1999-10-25 | 2001-12-19 | 阿尔斯托姆公司 | Improved lightning arrester based on non-linear varistors |
| CN1326198A (en) * | 2000-05-25 | 2001-12-12 | 列特龙株式会社 | Spinel ferrite thermal sensitive resistance component with negative temperature coefficient |
| CN1348192A (en) * | 2000-10-11 | 2002-05-08 | 株式会社村田制作所 | Semiconductor ceramic with negative resistance temperature coefficient and negative temperature coefficient thermistor |
| JP2004286490A (en) * | 2003-03-19 | 2004-10-14 | Ngk Spark Plug Co Ltd | Temperature sensor |
| CN101118793A (en) * | 2007-09-12 | 2008-02-06 | 山东中厦电子科技有限公司 | Low electric resistivity high B values negative temperature coefficient thermistor chip and manufacturing method therefor |
| KR20110047481A (en) * | 2009-10-30 | 2011-05-09 | 전자부품연구원 | An inner oxide electrode material and a multilayer ceramic device having the same |
| CN101786861A (en) * | 2009-12-28 | 2010-07-28 | 中国科学院新疆理化技术研究所 | Negative temperature coefficient thermosensitive resistor with high resistance and low B value |
| CN102971808A (en) * | 2010-06-24 | 2013-03-13 | Tdk株式会社 | Chip thermistor and method of manufacturing same |
| CN103403938A (en) * | 2011-02-15 | 2013-11-20 | 攀时股份有限公司 | Layer structure and use thereof to form a ceramic layer structure between an interconnect and a cathode of a high-temperature fuel cell |
| CN102211924A (en) * | 2011-04-01 | 2011-10-12 | 中国科学院新疆理化技术研究所 | Preparation method of composite phase negative temperature coefficient thermal sensitive ceramic material |
| CN103386719A (en) * | 2013-08-09 | 2013-11-13 | 常熟市鹰腾模具配件制造有限公司 | Novel combination mold |
| CN104124014A (en) * | 2014-01-09 | 2014-10-29 | 华东理工大学 | Double-layer NTC (Negative Temperature Coefficient) thermistor and preparation method thereof |
| CN104700970A (en) * | 2015-03-30 | 2015-06-10 | 东莞理工学院 | Negative temperature coefficient film thermistor, preparation method of negative temperature coefficient film thermistor and adjustment method for resistance value of negative temperature coefficient film thermistor |
| CN204894314U (en) * | 2015-08-04 | 2015-12-23 | 福州诺贝尔福基机电有限公司 | Resin tube preheating cabinet |
| CN106518052A (en) * | 2015-09-10 | 2017-03-22 | 华中科技大学 | Method for preparing fine-grained barium titanate temperature-sensitive ceramic and product thereof |
| CN105551699A (en) * | 2015-12-24 | 2016-05-04 | 深圳顺络电子股份有限公司 | NTC thermistor and manufacturing method therefor |
| CN107056273A (en) * | 2017-05-25 | 2017-08-18 | 中国科学院新疆理化技术研究所 | A kind of double-deck negative tempperature coefficient thermistor and preparation method thereof |
| CN107840462A (en) * | 2017-11-29 | 2018-03-27 | 宁波江北峰尚环保设备有限公司 | A kind of water purifying structure for water purifier |
Non-Patent Citations (7)
| Title |
|---|
| ANTONIO FETEIRA等: "Negative Temperature Coefficient Resistance (NTCR) Ceramic Thermistors An Industrial Perspective", 《JOURNAL OF AMERICAN CERAMIC SOCIETY》 * |
| CUIPING HUANG等: "Preparation and characterization of LaMn0.5Co0.5O3–Ni0.66Mn2.34O4 composite NTC ceramics", 《JOURNAL OF MATERIALS SCIENCE MATERIALS IN ELECTRONICS》 * |
| 关芳等: "Ti掺杂对(LaMn1-xTiO3)0.67(NiMn2O4)0.33(0≤x≤0.7)陶瓷材料微结构及电性能影响", 《无机化学学报》 * |
| 牛济泰等: "《航空航天材料的焊接与胶接》", 31 January 2012, 国防工业出版社 * |
| 王迎军等: "《新型材料科学与技术 无机材料卷 中》", 31 October 2016, 华南理工大学出版社 * |
| 章天金等: "LaCrO3-NiMn2O4复合陶瓷材料结构与性能的研究", 《湖北大学学报（自然科学版）》 * |
| 赵永立等: "LaMnO3–Ni0.75Mn2.25O4 Supported Bilayer NTC Thermistors", 《JOURNAL OF AMERICAN CERAMIC SOCIETY》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110054493A (en) * | 2019-03-26 | 2019-07-26 | 济南大学 | A kind of Lanthanum Chromite based perovskite phase and Spinel NTC thermal sensitive ceramic material and preparation method |
| CN110054480A (en) * | 2019-03-26 | 2019-07-26 | 济南大学 | A kind of negative temperature coefficient thermal-sensitive ceramic material and preparation method and application with sandwich structure |
| CN109942285A (en) * | 2019-04-09 | 2019-06-28 | 济南大学 | A kind of in-situ preparation lamellar composite negative temperature coefficient thermal-sensitive ceramic material and preparation method and application |
| CN112624740A (en) * | 2020-12-26 | 2021-04-09 | 重庆材料研究院有限公司 | High-entropy NTC thermistor ceramic material and preparation method thereof |
| CN112624740B (en) * | 2020-12-26 | 2022-08-02 | 重庆材料研究院有限公司 | High-entropy NTC thermistor ceramic material and preparation method thereof |
| CN113200735A (en) * | 2021-05-14 | 2021-08-03 | 合肥工业大学 | High-resistivity low-B-value type negative temperature coefficient thermistor material and preparation method thereof |
| CN115536367A (en) * | 2022-09-29 | 2022-12-30 | 肇庆市金龙宝电子有限公司 | High-resistance low-B-value thermistor ceramic body, preparation method and thermistor |
| CN115894026A (en) * | 2022-11-29 | 2023-04-04 | 唐山恭成科技有限公司 | NTC thermistor material with low resistivity and high B value and preparation method thereof |
| CN115894026B (en) * | 2022-11-29 | 2023-08-08 | 唐山恭成科技有限公司 | NTC thermistor material with low resistivity and high B value and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108439982B (en) | 2021-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108439982A (en) | A kind of axial composite-rotor negative temperature coefficient thermal-sensitive ceramic material and preparation method thereof | |
| US10622124B2 (en) | High temperature negative temperature coefficient thermistor material and preparation method thereof | |
| CN107324799B (en) | Perovskite-like high-temperature thermistor material and preparation method thereof | |
| CN112876232B (en) | High-temperature NTC thermal sensitive ceramic material and discharge plasma sintering method thereof | |
| CN108585794A (en) | A kind of chromium manganese is total to occupy-place Ca-Ti ore type negative temperature coefficient thermal-sensitive ceramic material | |
| CN110272275B (en) | Zinc oxide resistance card and preparation method thereof | |
| CN107056279A (en) | Single donor doping positive temperature coefficient thermal sensitive ceramic and preparation method thereof | |
| CN102211924A (en) | Preparation method of composite phase negative temperature coefficient thermal sensitive ceramic material | |
| CN105967656B (en) | Novel NTC thermistor material based on nickel oxide | |
| CN102311259A (en) | Composite-phase negative temperature coefficient thermal-sensitive ceramic material | |
| CN112851313B (en) | High-temperature thermistor material and microwave preparation method thereof | |
| CN105753474A (en) | Strontium-doped lanthanum chromite thermistor material | |
| CN104557040B (en) | High-temperature thermistor material and preparation method thereof | |
| CN104311004B (en) | PTC ceramic material and method for improving resistance temperature stability below curie point of PTC ceramic material | |
| CN102964119A (en) | Low-temperature-sintered BiFeO3-based high-performance negative-temperature-coefficient thermosensitive ceramic material and preparation method thereof | |
| CN110054493A (en) | A kind of Lanthanum Chromite based perovskite phase and Spinel NTC thermal sensitive ceramic material and preparation method | |
| CN104310984B (en) | A kind of thermal sensitive ceramic material and preparation method thereof | |
| CN104193320B (en) | A kind of Nanocrystalline Zno-based Varistor composite powder material and preparation method thereof | |
| CN104211399B (en) | The preparation method of the controlled polycrystal target of a kind of temperature-coefficient of electrical resistance | |
| CN101786861B (en) | Negative temperature coefficient thermosensitive resistor with high resistance and low B value | |
| CN108585854A (en) | A kind of Fe2O3 doping Ca-Ti ore type negative temperature coefficient thermal-sensitive ceramic material and its preparation | |
| CN107500756A (en) | A kind of high-k low-loss SrTiO3Based dielectric material and preparation method thereof | |
| CN114394819B (en) | High-reliability chip NTC thermistor material and preparation method and application thereof | |
| CN103787652B (en) | Novel diphase NTC (negative temperature coefficient) thermistor material and preparation method thereof | |
| CN107903042A (en) | A kind of preparation method of NTC thermistor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |