CN107548174A - A kind of vehicle thermoregulator ceramic heating element and preparation method thereof - Google Patents
A kind of vehicle thermoregulator ceramic heating element and preparation method thereof Download PDFInfo
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- CN107548174A CN107548174A CN201710909683.6A CN201710909683A CN107548174A CN 107548174 A CN107548174 A CN 107548174A CN 201710909683 A CN201710909683 A CN 201710909683A CN 107548174 A CN107548174 A CN 107548174A
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- inner insulating
- heating element
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 90
- 239000000919 ceramic Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000009422 external insulation Methods 0.000 claims abstract description 36
- 239000002002 slurry Substances 0.000 claims abstract description 30
- 238000010344 co-firing Methods 0.000 claims abstract description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 239000001257 hydrogen Substances 0.000 claims description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 14
- 238000005219 brazing Methods 0.000 claims description 13
- 229910052573 porcelain Inorganic materials 0.000 claims description 13
- 229910052759 nickel Inorganic materials 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 6
- 238000005476 soldering Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 239000010946 fine silver Substances 0.000 claims description 4
- 238000001465 metallisation Methods 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims description 4
- 229920000297 Rayon Polymers 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000007766 curtain coating Methods 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
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- 239000003292 glue Substances 0.000 claims description 3
- 238000007650 screen-printing Methods 0.000 claims description 3
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- 238000000748 compression moulding Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 6
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- 239000012535 impurity Substances 0.000 description 5
- 239000012188 paraffin wax Substances 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000008602 contraction Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000013475 authorization Methods 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
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- 229910002113 barium titanate Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical group [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
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- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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Abstract
The invention discloses a kind of vehicle thermoregulator ceramic heating element and preparation method thereof, including heater, heater includes external insulation layer and inner insulating layer, external insulation layer and inner insulating layer are aluminium oxide ceramics, heating circuit is placed between external insulation layer and inner insulating layer, through hole is provided with inner insulating layer, the bottom of heater is provided with wire holder, fairlead is provided with wire holder, therebetween connected in through hole and fairlead and with metallic resistance slurry, heater, wire holder and heating circuit three turn into an entirety by high temperature co-firing, the both ends of heating circuit are connected with least two electrodes, at least two leads pass through fairlead, and it is connected respectively to by metallic resistance slurry on electrode.The present invention use above structure, ceramic heating element quick heating, good insulation preformance, the problems such as being not in resistance oxidation, power attenuation, and stably, heating temp is uniform for heating property；The preparation method simple possible of ceramic heating element, product qualification rate are high.
Description
Technical field
The present invention relates to vehicle thermoregulator technical field, more particularly to a kind of vehicle thermoregulator ceramic heating element and its
Preparation method.
Background technology
Thermosistor is also known as thermostat, is the valve for controlling coolant flow paths, is a kind of automatic temperature-regulator, generally contains
There is the temperature module, the flowing of air, gas or liquid is opened, turns off by expansion or shrinkage.
With the raising to automobile fuel consumption and exhaust emissions requirement, adjust the temperature electronically device effect in this regard and advantage is recognized
Can, the device market demand that adjusts the temperature electronically is increasing.And the device price that adjusts the temperature electronically is higher by more than 10 times than common thermosistor price,
Therefore the device element that adjusts the temperature electronically of customer need high reliability.For adjusting the temperature electronically, device performance is mainly reflected in inductor component
On.Inductor component is made up of body, body cap, diaphragm seal, sebific duct, wax-wrapped pill, push rod, heating element heater, sealing ring.
At present, a heating element heater, existing heating are added inside the inductor component in the existing device that adjusts the temperature electronically
Typically using on the skeleton of plastic cement 7, around heating wire 9, (such as Figure 12, plastic cement 7 is additionally provided with sealing ring 8 to element outside, in use, heating element heater
Copper sheathing 10 is cased with outside, as shown in figure 13) or using printed resistor on metallic substrates and extraction wire, be then molded into specific
The mode of shape is made.Its internal pressure can reach more than 25MPa to inductor assembly at work, but the modeling of existing heating element heater
Expect that intensity is not high, and metal substrate is conductive, easily electric leakage, so as to influence the reliability of inductor.Heating wire or metal substrate
Heating is simultaneously exposed in paraffin for a long time, and insulating properties are bad, and plastic cement skeleton low intensity in high temperature environments, yielding in addition,
The sealing of sealing ring is influenceed, the pressure that can't stand 25MPa is held, causes paraffin to reveal, so as to influence the reliability of inductor.
In order to solve the above problems, Authorization Notice No. is the B (day for announcing 2015.11.25) of CN 103002604 China
Patent of invention, disclose one kind and adjust the temperature electronically device heating element heater and preparation method thereof, its heating element heater is positioned at the device that adjusts the temperature electronically
In inductor, including thermistor, heating element head and base, the heating element heater are ceramic material, and thermistor is buried
In heating element head, wire one end is connected with thermistor, and the other end passes base.The heating element heater is by with lower section
Method is prepared：(1) it is Al by weight percent by raw material2O3>=97%, SiO2≤ 1%, Fe2O3≤ 0.5%, CaO≤1%,
Aluminium oxide ceramics green compact are made in other impurity≤0.5%；(2) thermistor and wire rear mold are embedded into aluminium oxide ceramics green compact
It is molded；(3) heating element heater is sintered under reducing atmosphere, reducing atmosphere is the hydrogen that percentage by volume is 30%
The hydrogen that mixed gas or percentage by volume with 70% nitrogen are 100%.The inventive structure is simple, and cost is low, sealing effectiveness
It is good, there is very strong practicality.The heating element heater of metallic matrix is improved to ceramic matrix by the invention, maintains good heat conduction
Performance, and it is uniform to generate heat, while insulating properties, heating element heater possible leaky in actual applications is avoided,
The device performance that makes to adjust the temperature electronically is more stable reliable.The ceramic heating element intensity being prepared simultaneously using the inventive method is high, energy
50MPa pressure is born, it is more reliable, and cost is also low, and it is practical.
However, foregoing invention patent, there are the following problems：1. lead material and burn till problem：Alumina content is more than 97
Ceramic sintering temperature it is general all more than 1500 DEG C, the material such as conventional nickel, copper, which makees wire, can all melt；Wire is embedded in ceramics
In, ceramic firing has 15% or so contraction and wire does not have, and so burning to ftracture；2. thermistor material and burning till is asked
Topic：Thermistor is often referred to PTC semiconductor thermistors for heating, and this thermistor main component is barium titanate, if
It is embedded in aluminum oxide green compact to burn altogether and can also has the problem of melting cracking and being reacted with aluminium oxide ceramics；3. wire and thermistor
Connection it is also inconvenient.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of vehicle thermoregulator ceramic heating element and preparation method thereof,
Ceramic heating element quick heating, the problems such as good insulation preformance is not in resistance oxidation, power attenuation, heating property is stable, hair
Hot temperature is uniform, and heat transfer rate is fast, and heat utilization efficiency is high；The preparation method simple possible of ceramic heating element, product qualification rate are high.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of vehicle thermoregulator ceramic heating element, including heater, the heater include external insulation layer and it is interior absolutely
Edge layer, the external insulation layer and inner insulating layer are aluminium oxide ceramics, and heating circuit is placed in the external insulation layer and inner insulating layer
Between, through hole is provided with the inner insulating layer, the bottom of the heater is provided with wire holder, lead is provided with the wire holder
Therebetween connected in hole, the through hole and fairlead and with metallic resistance slurry, the heater, wire holder and heating
Circuit three turns into an entirety by high temperature co-firing, and the both ends of the heating circuit are connected with least two electrodes, at least two
Root lead passes through the fairlead, and is connected respectively to by the metallic resistance slurry on the electrode.
Preferably, the lead is nickel wire or copper cash, the external insulation layer and inner insulating layer are mass percent
For 92%-96.5% aluminium oxide ceramics, the material of the wire holder is as the material of the heater.
Preferably, the heater is in a tubular form, the wire holder includes integrally formed wire holder head and wire holder
Main body, it is interference fitted between heater and the wire holder head.
Preferably, cylinder is made on the wire holder head, the wire holder head is stuck in the heater, described
The internal diameter of heater is smaller 0.14-0.20mm than the external diameter on the wire holder head.
Preferably, tubulose is made on the wire holder head, the heater is stuck in the wire holder head, the hair
The external diameter of hot body is bigger 0.14-0.20mm than the internal diameter on the wire holder head.
Preferably, the metallic resistance slurry is made up of tungsten powder or molybdenum powder plus porcelain powder, the tungsten powder or molybdenum powder
Mass percent be 65%-100%, the mass percent of the porcelain powder is 0%-35%, line with heating function route metal electricity
Resistance paste is made, its shape form of zigzag.
A kind of preparation method of the vehicle thermoregulator ceramic heating element, comprises the following steps：
Step 1, metallic resistance slurry is made：Metallic resistance slurry is rolled into plus porcelain powder with tungsten powder or molybdenum powder, is rolled
When add adhesive, solvent and dispersant；
Step 2, external insulation layer and inner insulating layer are made：External insulation layer and interior insulation is made with aluminium oxide ceramics curtain coating green compact
Layer, and through hole is stamped out to the inner insulating layer；
Step 3, printing heating circuit：With screen printing technique on the outside of the inner insulating layer on type metal resistance starch
Material, form heating circuit, filled up in the through hole of the inner insulating layer with metallic resistance slurry, on inner insulating layer inboard with through hole
Corresponding position print electrode；
Step 4, heater is made：Last layer viscose glue is applied in the inner insulating layer outer surface and external insulation layer inner surface, will
On the external insulation layer is bonded on the outside of the inner insulating layer, and by a metal bar core, by the external insulation layer and inner insulating layer
Be rolled into tubulose, form heater, now two electrodes be in it is same diametrically, the heater is passed through together with metal bar core
Static pressure compression molding, then metal bar core is extracted out from heater；
Step 5, wire holder is made：Drawn with aluminium oxide ceramics by injection moulding or injection moulding into wire holder, and described
Fairlead is reserved in line seat；
Step 6, biscuiting and metallization：By wire holder biscuiting, printed after biscuiting in the fairlead with surface and side
Upper or coated with metal resistance slurry；
Step 7, it is aligned：Wire holder head is put into heater, when being put into, the fairlead and electrode alignment made
Both be in it is same diametrically；
Step 8, burn altogether：Under reducibility gas, the heater, wire holder and heating circuit three are consolidated by tool
Determining high temperature co-firing turns into an entirety, and reducibility gas is the hydrogen that percentage by volume is 35%-75% and 25%-65% nitrogen
Gas；
Step 9, nickel plating：The nickel plating in the fairlead；
Step 10, high temperature brazing：High temperature is carried out to the fairlead and lead with silver-bearing copper or fine silver solder or nickel soldering paste
Soldering；
Step 11, glaze is sealed：Not higher than brazing temperature and under reducibility gas, with glaze by the wire holder and heating
Body seals.
Preferably, in the step 4, dislocation lap joint is formed in edge when external insulation layer and inner insulating layer are bonded.
Preferably, in the step 6, the temperature of biscuiting is 1100 DEG C -1400 DEG C；In the step 8, the temperature burnt altogether
For 1550 DEG C -1650 DEG C；In the step 10, brazing temperature is 700 DEG C -1000 DEG C；In the step 11, envelope glaze temperature is
700 DEG C -1000 DEG C and it is not higher than brazing temperature.
Preferably, in the step 8, before reducibility gas is passed through, hydrogen and nitrogen is first allowed to pass through wet hydrogen bucket, wet hydrogen
For bucket built with the water of certain temperature, water temperature is 38 DEG C -45 DEG C.
Compared with prior art, beneficial effects of the present invention are：
1. the present invention uses aluminium oxide ceramics, the heating circuit that the metallic resistance slurry of printing is formed is wrapped in inside,
Burn altogether and be used as heater, good insulation preformance, intensity is high, and heat conduction is fast, and heating is uniform, and power density is big, it is possible to achieve is rapidly heated
And temperature-compensating, security performance is high, service life length.
2. in the prior art, metal substrate or heating wire are usually and wax directly contacts, insulation is poor, and power density is not made pottery
Porcelain heater is big, and plastic cement skeleton high temperature is yielding, of poor quality.In the present invention, heating circuit is placed in external insulation layer and interior insulation
Between layer, three turns into an entirety by high temperature co-firing, in the absence of high temperature deformation.
3. compared with Authorization Notice No. is the B of CN 103002604 Chinese invention patent, in its heating element heater, temperature-sensitive electricity
Resistance and wire are embedded in ceramics and burnt altogether, are not easy to realize in practical operation, and in the present invention, external insulation layer, heating circuit and interior
Insulating barrier three burns till the mode being integrated and easily realized altogether.
4. heater heating temp is uniform, under identical voltage, its temperature difference is small, can improve the performance of thermosistor, can be effective
The temperature of engine is controlled, reduces engine scuffing, improves fuel economy.
It is simple to operate, operating efficiency is high 5. the structure of the present invention is simple, more convenient compared with the installation of other heaters during use.
6. in the preparation method of the present invention, heating circuit is printed on inner insulating layer, it is simple to operate.
7. in the preparation method of the present invention, after first burning heater, wire holder and heating circuit altogether, then fairlead plated
Nickel, and lead high temperature brazing, such lead be just not present with it is ceramic co-fired and the problem of be melted.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The preferred embodiment of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the stereogram of the present invention；
Fig. 2 is the left view of the present invention；
Fig. 3 is the upward view of the present invention；
Fig. 4 is the sectional view of the line A-A along Fig. 3；
Fig. 5 is the structural representation of inner insulating layer outside 121 and heating circuit 4 in the present invention；
Fig. 6 is the structural representation of inner insulating layer inboard 122 in the present invention；
Fig. 7 is the stereogram of wire holder 2 in the present invention；
Fig. 8 is the front view of wire holder 2 in the present invention；
Fig. 9 is the top view of wire holder 2 in the present invention；
Figure 10 is the sectional view of the line B-B along Fig. 9；
Figure 11 is the sectional view that wire holder 2 uses another structure in the present invention；
Figure 12 is in the prior art using the heating element heater on the skeleton of plastic cement 7 around heating wire 9；
Figure 13 is the assembling figure of heating element heater in the prior art.
In figure, 1- heaters, 11- external insulation layers, 12- inner insulating layers, on the outside of 121- inner insulating layers, in 122- inner insulating layers
Side, 123- through holes, 2- wire holders, 21- wire holders head, 22- wire holder main bodys, 23- fairleads, 3- leads, 4- heating circuits,
41- electrodes, 5- metallic resistance slurries, 6- glaze, 7- plastic cement, 8- sealing rings, 9- heating wire, 10- copper sheathings.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings.Herein it should be noted that for
The explanation of these embodiments is used to help understand the present invention, but does not form limitation of the invention.It is in addition, disclosed below
As long as each embodiment of the invention in involved technical characteristic do not form conflict can each other and be mutually combined.
As Figure 1-Figure 4, a kind of vehicle thermoregulator ceramic heating element disclosed by the invention, including heater 1, hair
Hot body 1 includes external insulation layer 11 and inner insulating layer 12, and external insulation layer 11 and inner insulating layer 12 are aluminium oxide ceramics, and generate heat circuit
4 are placed between external insulation layer 11 and inner insulating layer 12, and through hole 123 is provided with inner insulating layer 12, and the bottom of heater 1, which is provided with, draws
Line seat 2, is provided with fairlead 23 in wire holder 2, uses in through hole 123 and fairlead 23 and metallic resistance slurry 5 therebetween
Connection so that both can turn on connection, and heater 1, wire holder 2 and the heating three of circuit 4 turn into one by high temperature co-firing
Overall, the both ends (other end for the circuit 4 that generated heat in Fig. 5 is not deployed) of the circuit 4 that generates heat are connected with least two electrodes 41, and at least two
Root lead 3 passes through fairlead 23, and is connected respectively to by metallic resistance slurry 5 on electrode 41, and lead 3 is nickel wire or copper
Line.
External insulation layer 11 and inner insulating layer 12 are the aluminium oxide ceramics that mass percent is 92%-96.5%.Meanwhile it is
Make the present invention it is easy to make, the material of wire holder 2 is preferably as the material of heater 1.
In a tubular form, so when 1 heating paraffin wax of heater, the inner and outer wall of heater 1 can be to paraffin for heater 1
Heating, is greatly enhanced the efficiency of heating surface.
Referring to Fig. 7-Figure 11, wire holder 2 includes integrally formed wire holder head 21 and wire holder main body 22, heater 1
It is interference fitted between wire holder head 21 so that heater 1 can be bound more closely with wire holder 2, be avoided when ceramics hair
Thermal element is used in liquid leakage when in thermosistor.As embodiment one, as shown in Fig. 7-Figure 10, wire holder head 21 can make
Cylinder, wire holder head 21 are stuck in heater 1, and now the internal diameter d1 of heater 1 is smaller than the outer diameter D 2 on wire holder head 21
0.14-0.20mm.As embodiment two, as shown in figure 11, wire holder head 21 can make tubulose, and heater 1 is stuck in lead
In seat head 21, now the outer diameter D 1 of heater 1 is bigger 0.14-0.20mm than the internal diameter d2 on wire holder head 21.Certainly, wire holder
2 are not limited to both the above with the connected mode of heater 1, as long as can make both clampings.
Metallic resistance slurry 5 is made up of the refractory metal such as tungsten powder (W) or molybdenum powder (Mo) plus porcelain powder, wherein tungsten powder or
The mass percent of person's molybdenum powder is 65%-100%, and the mass percent of porcelain powder is 0%-35%, and the proportion of porcelain powder is bigger, metal
The resistance of resistance slurry 5 is bigger, specifically can be according to product it needs to be determined that the ratio of tungsten powder or molybdenum powder and porcelain powder.
Heating circuit 4 is made up of metallic resistance slurry 5, its shape form of zigzag, as shown in figure 5, so heating circuit 4
Can evenly and more it be distributed in heater 1 so that heater 1 generates heat faster evenly.
The invention also discloses a kind of preparation method of vehicle thermoregulator ceramic heating element, comprise the following steps：
Step 1, metallic resistance slurry 5 is made：Metallic resistance slurry 5 is rolled into plus porcelain powder with tungsten powder or molybdenum powder, is rolled
Adhesive, solvent and dispersant are added when processed；
Step 2, external insulation layer 11 and inner insulating layer 12 are made：The He of external insulation layer 11 is made with aluminium oxide ceramics curtain coating green compact
Inner insulating layer 12, and through hole 123 is stamped out to inner insulating layer 12；
Step 3, printing heating circuit 4：With screen printing technique 121 on the outside of the inner insulating layer on type metal resistance slurry
5, heating circuit 4 is formed, as shown in figure 5, being filled up in the through hole 123 of inner insulating layer 12 with metallic resistance slurry 5, in inner insulating layer
Print electrode 41 on inboard 122 with the corresponding position of through hole 123, as shown in Figure 6；
Step 4, heater 1 is made：Last layer viscose glue is applied in the outer surface of inner insulating layer 12 and the inner surface of external insulation layer 11, will
External insulation layer 11 is bonded on 121 on the outside of inner insulating layer, and by a metal bar core, external insulation layer 11 and inner insulating layer 12 are rolled into
Tubulose, formed heater 1, now two electrodes 41 be in it is same diametrically.In addition, to make external insulation layer 11 and inner insulating layer 12
Tubulose can be smoothly rolled into, dislocation lap joint is formed in edge when both are bonded；Heater 1 is passed through etc. together with metal bar core quiet
Pressing mold is molded, then extracts metal bar core from heater 1 out；
Step 5, wire holder 2 is made：With aluminium oxide ceramics by injection moulding or injection moulding into wire holder 2, and in lead
Fairlead 23 is reserved in seat 2；
Step 6, biscuiting and metallization：By the biscuiting of wire holder 2, due to high temperature sintering aluminium oxide ceramics, aluminum oxide can be made to make pottery
Porcelain becomes fine and close, so that wire holder 2 shrinks, the heater 1 being interference fitted originally and wire holder head 21, by wire holder
After 2 biscuitings are shunk, wire holder head 21 can be successfully put into heater 1, meanwhile, wire holder 2 can also have after biscuiting
Certain intensity, this is to be directed to the situation that wire holder head 21 in embodiment one is caught in heater 1, and following steps are also to implement
Carried out on the basis of example one., then will heating if being caught in the situation on wire holder head 21 for heater 1 in embodiment two
The biscuiting of body 1, after the biscuiting of heater 1 contraction, heater 1 can be successfully put into wire holder head 21.The temperature of biscuiting
For 1100 DEG C -1400 DEG C.After biscuiting in the fairlead 23 and surface and side, i.e., the position contacted with heater 1, in printing or
Person's coated with metal resistance slurry 5 so that fairlead 23 metallizes, i.e., fairlead 23 can be conductive, the purpose of metallization be in order to
Fairlead 23 and through hole 123 is allowed to turn on and link together；
Step 7, it is aligned：Wire holder head 21 is put into heater 1, when being put into, fairlead 23 be aligned with electrode 41,
Make both be in it is same diametrically；
Step 8, burn altogether：Under reducibility gas, heater 1, wire holder 2 and the heating three of circuit 4 are consolidated by tool
Determining high temperature co-firing turns into an entirety, and reducibility gas is the hydrogen that percentage by volume is 35%-75% and 25%-65% nitrogen
Gas, the temperature burnt altogether are 1550 DEG C -1650 DEG C.Because wire holder 2 have passed through biscuiting before, therefore in common burning, wire holder 2
Contraction is smaller, and the contraction of heater 1 is larger, and both shrinkage ratios are inconsistent, and after common burning, heater 1 can be by wire holder 2
Clamping, so that both form interference fit.
During common burning, due to containing carbon impurity inside aluminium oxide ceramics, these carbon impurities can directly affect sintering
Quality, therefore before reducibility gas is passed through, can first allow hydrogen and nitrogen to pass through wet hydrogen bucket, wet hydrogen bucket is built with certain temperature
Water, water temperature are 38 DEG C -45 DEG C so that hydrogen and nitrogen carry certain aqueous vapor and entered in sintering furnace, at high temperature, hydrone tool
There is certain oxidation characteristic, generate carbon monoxide or carbon dioxide with carbon impurity and discharge, so as to effectively go alumina
The carbon impurity of ceramics, ensure the quality of sintering；
Step 9, nickel plating：The nickel plating in fairlead 23；
Step 10, high temperature brazing：High temperature pricker is carried out to fairlead 23 and lead 3 with silver-bearing copper or fine silver solder or nickel soldering paste
Weldering, brazing temperature are 700 DEG C -1000 DEG C, and now fairlead 23 is fully sealed for silver-bearing copper or fine silver solder or nickel soldering paste, unlikely
In there is Seepage；
Step 11, glaze is sealed：Not higher than brazing temperature and under reducibility gas, i.e., temperature is 700 DEG C -1000 DEG C and not
Higher than brazing temperature, wire holder 2 and heater 1 are sealed with glaze 6, prevented in the use of the present invention, paraffin seepage is got off.By
It is inorganic material in glaze 6, compared with other organic encapsulants, product hermeticity of the invention can be good, is not easy simultaneously
Aging.
Embodiments of the present invention are explained in detail above in association with accompanying drawing, but the invention is not restricted to described implementation
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen within protection scope of the present invention.
Claims (10)
- A kind of 1. vehicle thermoregulator ceramic heating element, it is characterised in that：Including heater, the heater includes external insulation Layer and inner insulating layer, the external insulation layer and inner insulating layer are aluminium oxide ceramics, heating circuit be placed in the external insulation layer and Between inner insulating layer, through hole is provided with the inner insulating layer, the bottom of the heater is provided with wire holder, in the wire holder Be provided with fairlead, the through hole with connected in fairlead and with metallic resistance slurry therebetween, the heater, lead Seat and heating circuit three turn into an entirety by high temperature co-firing, and the both ends of the heating circuit are connected with least two electricity Pole, at least two leads pass through the fairlead, and are connected respectively to by the metallic resistance slurry on the electrode.
- 2. vehicle thermoregulator ceramic heating element according to claim 1, it is characterised in that：The lead be nickel wire or Person's copper cash, the external insulation layer and inner insulating layer be mass percent be 92%-96.5% aluminium oxide ceramics, the lead The material of seat is as the material of the heater.
- 3. vehicle thermoregulator ceramic heating element according to claim 1, it is characterised in that：The heater is in pipe Shape, the wire holder include integrally formed wire holder head and wire holder main body, between heater and the wire holder head Interference fit.
- 4. vehicle thermoregulator ceramic heating element according to claim 3, it is characterised in that：Do on the wire holder head Into cylinder, the wire holder head is stuck in the heater, and the internal diameter of the heater is outer than the wire holder head The small 0.14-0.20mm in footpath.
- 5. vehicle thermoregulator ceramic heating element according to claim 3, it is characterised in that：Do on the wire holder head Into tubulose, the heater is stuck in the wire holder head, the internal diameter of the external diameter of the heater than the wire holder head Big 0.14-0.20mm.
- 6. vehicle thermoregulator ceramic heating element according to claim 1, it is characterised in that：The metallic resistance slurry It is made up of tungsten powder or molybdenum powder plus porcelain powder, the mass percent of the tungsten powder or molybdenum powder is 65%-100%, the porcelain powder Mass percent be 0%-35%, line with heating function route metallic resistance slurry is made, its shape form of zigzag.
- 7. a kind of preparation method of the ceramic heating element of vehicle thermoregulator according to claim 1, comprises the following steps：Step 1, metallic resistance slurry is made：Metallic resistance slurry is rolled into plus porcelain powder, add during rolling with tungsten powder or molybdenum powder Enter adhesive, solvent and dispersant；Step 2, external insulation layer and inner insulating layer are made：External insulation layer and inner insulating layer is made with aluminium oxide ceramics curtain coating green compact, And through hole is stamped out to the inner insulating layer；Step 3, printing heating circuit：With screen printing technique on the outside of the inner insulating layer on type metal resistance slurry, shape Into heating circuit, is filled up in the through hole of the inner insulating layer with metallic resistance slurry, on inner insulating layer inboard with pair of through hole Opening position is answered to print electrode；Step 4, heater is made：Last layer viscose glue is applied in the inner insulating layer outer surface and external insulation layer inner surface, by described in On external insulation layer is bonded on the outside of the inner insulating layer, and by a metal bar core, the external insulation layer and inner insulating layer are rolled into Tubulose, formed heater, now two electrodes be in it is same diametrically, the heater is passed through into isostatic pressed together with metal bar core Compression molding, then metal bar core is extracted out from heater；Step 5, wire holder is made：With aluminium oxide ceramics by injection moulding or injection moulding into wire holder, and in the wire holder Interior reserved fairlead；Step 6, biscuiting and metallization：By wire holder biscuiting, after biscuiting in the fairlead and in surface and side printing or Person's coated with metal resistance slurry；Step 7, it is aligned：Wire holder head is put into heater, when being put into, by the fairlead and electrode alignment, make its two Person be in it is same diametrically；Step 8, burn altogether：Under reducibility gas, the heater, wire holder and heating circuit three are fixed into height by tool It is the hydrogen that percentage by volume is 35%-75% and 25%-65% nitrogen that temperature is burnt till as an entirety, reducibility gas altogether；Step 9, nickel plating：The nickel plating in the fairlead；Step 10, high temperature brazing：High temperature brazing is carried out to the fairlead and lead with silver-bearing copper or fine silver solder or nickel soldering paste；Step 11, glaze is sealed：It is with glaze that the wire holder and heater is close not higher than brazing temperature and under reducibility gas Envelope.
- 8. the preparation method of vehicle thermoregulator ceramic heating element according to claim 7, it is characterised in that：The step In rapid 4, dislocation lap joint is formed in edge when external insulation layer and inner insulating layer are bonded.
- 9. the preparation method of vehicle thermoregulator ceramic heating element according to claim 7, it is characterised in that：The step In rapid 6, the temperature of biscuiting is 1100 DEG C -1400 DEG C；In the step 8, the temperature burnt altogether is 1550 DEG C -1650 DEG C；The step In rapid 10, brazing temperature is 700 DEG C -1000 DEG C；In the step 11, envelope glaze temperature is 700 DEG C -1000 DEG C and is not higher than soldering Temperature.
- 10. the preparation method of vehicle thermoregulator ceramic heating element according to claim 7, it is characterised in that：It is described In step 8, before reducibility gas is passed through, first allows hydrogen and nitrogen pass through wet hydrogen bucket, wet hydrogen bucket built with certain temperature water, Water temperature is 38 DEG C -45 DEG C.
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| CN108503391A (en) * | 2018-04-10 | 2018-09-07 | 珠海惠友电子有限公司 | A kind of manufacturing process of ceramic heating part |
| CN108617040A (en) * | 2018-06-06 | 2018-10-02 | 南平市弘毅电子科技有限公司 | Ceramic core contact conductor ceramic heating bar and preparation method thereof |
| CN108817598A (en) * | 2018-08-01 | 2018-11-16 | 无锡康伟工程陶瓷有限公司 | A kind of magnetron cathode antenna brazed assembly |
| CN111842727A (en) * | 2020-07-13 | 2020-10-30 | Oppo（重庆）智能科技有限公司 | Jig for wire installation |
| CN113179559A (en) * | 2020-12-01 | 2021-07-27 | 深圳市卓力能技术有限公司 | Heating body and preparation method thereof, heating assembly and aerosol generating device |
| CN113698224A (en) * | 2021-07-22 | 2021-11-26 | 中广核研究院有限公司 | Resistance welding connection device and silicon carbide connection method |
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| CN113698224A (en) * | 2021-07-22 | 2021-11-26 | 中广核研究院有限公司 | Resistance welding connection device and silicon carbide connection method |
| CN113698224B (en) * | 2021-07-22 | 2023-03-03 | 中广核研究院有限公司 | Resistance welding connection device and silicon carbide connection method |
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