CN107324797A - A kind of high-potential gracient high nonlinear coefficient zinc oxide varistor medium and preparation method thereof - Google Patents

A kind of high-potential gracient high nonlinear coefficient zinc oxide varistor medium and preparation method thereof Download PDF

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CN107324797A
CN107324797A CN201710487871.4A CN201710487871A CN107324797A CN 107324797 A CN107324797 A CN 107324797A CN 201710487871 A CN201710487871 A CN 201710487871A CN 107324797 A CN107324797 A CN 107324797A
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zinc oxide
oxide varistor
mnnb
mnsio
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陈映义
牛继恩
王新苗
李云峰
姜学文
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Shantou Rui Sheng Electronics Co Ltd
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Shantou Rui Sheng Electronics Co Ltd
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Abstract

A kind of high-potential gracient high nonlinear coefficient zinc oxide varistor medium, based on molfraction, consisting of：100 parts of ZnO, Sb2O30.03 1.5 parts, Co2O30.03 1.5 parts, Bi2O30.03 1.5 parts, Ni2O30.03 1.5 parts, Cr2O30.03 1.5 parts, MnNb2O60.03 1.5 parts, Al2O30.03 0.8 parts, 0.03 0.8 parts of Firebrake ZB, LiNO30.03 0.8 parts, MnSiO30.03 0.8 parts.The present invention also provides a kind of preparation method of above-mentioned high-potential gracient high nonlinear coefficient zinc oxide varistor medium.The zinc oxide varistor medium of the present invention has high-potential gracient, high nonlinear coefficient, and pulse shock tolerance is strong.

Description

A kind of high-potential gracient high nonlinear coefficient zinc oxide varistor medium and its system Preparation Method
Technical field
The present invention relates to the dielectric material of piezoresistor, and in particular to a kind of high-potential gracient high nonlinear coefficient oxidation Zinc pressure-sensitive resistor medium and preparation method thereof.
Background technology
Zinc oxide varistor material can be used for manufacture high-energy zinc oxide varistor, the Zinc-oxide piezoresistor Piece can be used for manufacture arrester or piezoresistor, applied to abnormal overvoltage is absorbed in power electronic circuits, with protection circuit System.Often because thunderbolt load causes circuit abnormal overvoltage, Zinc-oxide piezoresistor dielectric material in power electronic circuits It has been largely used to that abnormal overvoltage is absorbed or suppressed in power electronic circuits, protection power electronic circuits exempt from destruction.
But, the Zinc-oxide piezoresistor dielectric material applied now, its electric potential gradient（Unit thickness pressure sensitive voltage） Usually less than 250V/mm, for the higher power electronic circuits of operating voltage, the thickness of the zinc oxide varistor used Larger or series connection quantity is more.If the electric potential gradient of Zinc-oxide piezoresistor dielectric material can be improved, same application scenario The thickness quantity that can reduce or connect of zinc oxide varistor can reduce, by keeping away that zinc oxide varistor is made The height of thunder device can be substantially reduced, and this can not only reduce the cost of arrester in itself, and can reduce arrester application scenario Gravity load, improve electrical power trans mission/distribution system reliability.
At present, existing Zinc-oxide piezoresistor dielectric material has a higher electric potential gradient, but mostly nonlinear factor compared with It is small, or pulse shock tolerance is weaker, it is difficult to the need for the lightning protection overvoltage protection for meeting power electronic circuits well.
The content of the invention
There is high-potential gracient, high nonlinear coefficient and high impulse punching the technical problem to be solved in the present invention is to provide one kind Zinc oxide varistor dielectric material of tolerance and preparation method thereof is hit, by this high-performance zinc oxide piezoresistor The piezoresistor that dielectric material is made has the advantages that high-potential gracient, high nonlinear coefficient, high impulse impact tolerance. The technical scheme of use is as follows：
A kind of high-potential gracient high nonlinear coefficient zinc oxide varistor medium, it is characterised in that based on molfraction, its Constitute and be：100 parts of ZnO, Sb2O30.03-1.5 parts, Co2O30.03-1.5 parts, Bi2O30.03-1.5 parts, Ni2O3 0.03- 1.5 parts, Cr2O30.03-1.5 parts, MnNb2O60.03-1.5 parts, Al2O30.03-0.8 parts, 0.03-0.8 parts of Firebrake ZB, LiNO30.03-0.8 parts, MnSiO30.03-0.8 parts.
It is preferred that above-mentioned MnNb2O6、MnSiO3Conventional chemical raw material is respectively adopted with Solid phase synthesis.
Above-mentioned MnNb2O6It can be prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And Nb2O5, it is then right MnCO3And Nb2O5It is ground and is well mixed；Again by MnCO3And Nb2O5Mixed material be put into alumina crucible, in 120 minutes are incubated at 1150-1200 DEG C, MnNb is obtained2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby With.
Above-mentioned MnSiO3It can be prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And SiO2, it is then right MnCO3And SiO2It is ground and is well mixed；Again by MnCO3And SiO2Mixed material be put into alumina crucible, in 120 minutes are incubated at 1200-1250 DEG C, MnSiO is obtained3.Obtained MnSiO3After cooling, ground and 200 mesh sieves excessively are standby.
It is prepared by one kind that the present invention also provides above-mentioned high-potential gracient high nonlinear coefficient zinc oxide varistor medium Method, it is characterised in that comprise the steps：
（1）ZnO, Sb are equipped with proportion2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3；
（2）Prepare additive slurry
By step（1）Provisioned Sb2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3Mixing, obtains compound；Then pure water is added into compound and ammonium salt dispersant carries out ball milling, each component is mixed Uniformly, additive slurry is obtained；
（3）Prepare spraying slurry
By step（1）Provisioned ZnO is added in additive slurry, and adds polyvinyl alcohol water solution, obtains mixed slurry； Then ball milling is carried out to mixed slurry, when the proportion for being milled to mixed slurry is 1.5-2.2 and viscosity is 40-200cps（Ball milling Time is about 3 hours）, obtain slurry of spraying；
（4）Using spray drying tower to step（3）Obtain spraying slurry and carry out mist projection granulating, obtain powder；
（5）Through dry-pressing formed, by step（4）Obtained powder pressing is into green sheet；
（6）By step（5）Obtained green sheet is excluded after polyvinyl alcohol, and 2-4 is incubated in the environment of temperature is 1100-1250 DEG C Hour, green sheet is sintered, high-potential gracient high nonlinear coefficient zinc oxide varistor medium is obtained.
Preferred steps（2）In, when carrying out ball milling, the addition of ammonium salt dispersant is the 0.5-1.3% of compound gross weight, quilt Compound, balls, the part by weight of water used of ball milling be：Compound:Ball:Water=1:3:(0.6-1.0).
Preferred steps（3）In, the solid content of the polyvinyl alcohol water solution added is ZnO, Sb2O3、Co2O3、Bi2O3、 Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3And MnSiO3Gross weight 0.8-1.6%.
Preferred steps（6）In, exclude polyvinyl alcohol in the environment of green sheet being placed in into 500-550 DEG C.
Step（6）Sintering process in, the polyethylene of moisture in green sheet, ammonium salt dispersant and remaining can be removed Alcohol.
In the two-face printing silver electrode of obtained high-potential gracient high nonlinear coefficient zinc oxide varistor dieelctric sheet Slurry, obtains argent electrode layer through 600 DEG C of reduction, that is, forms metal electrode；Then it is tin plating in the welding of two sides metal electrode Copper lead, then dip-coating high-temp epoxy insulated paint, cured rear reheating apply powder epoxy encapsulating material, and pressure-sensitive electricity is can obtain after solidification Hinder device.
The present invention compared with prior art, has the following advantages that：（1）The current potential of the zinc oxide varistor medium of acquisition Gradient is 534-692V/mm（Electric potential gradient can be adjusted by adjusting composition of raw materials or preparation technology）；（2）The oxidation of acquisition The nonlinear factor α of zinc pressure-sensitive resistor medium is 71-89；（3）The pulse shock of the zinc oxide varistor medium of acquisition Tolerance is strong；（4）Preparation is simple.In brief, zinc oxide varistor medium of the invention has high electricity Potential gradient, high nonlinear coefficient, and pulse shock tolerance is strong, it is expected to applied to electric lightning or other power electronics lines The lightning protection overvoltage protection on road.
Embodiment
Embodiment 1
First, with Solid phase synthesis MnNb2O6、MnSiO3。
MnNb2O6Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5 It is ground and is well mixed；Again by MnCO3And Nb2O5Mixed material be put into alumina crucible, at 1180 DEG C be incubated 120 minutes, obtain MnNb2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
MnSiO3Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And SiO2, then to MnCO3And SiO2Enter Row grinds and is well mixed；Again by MnCO3And SiO2Mixed material be put into alumina crucible, at 1220 DEG C be incubated 120 points Clock, obtains MnSiO3.Obtained MnSiO3After cooling, ground and 200 mesh sieves excessively are standby.
Then, it is prepared according to the following steps high-potential gracient high nonlinear coefficient zinc oxide varistor medium：
（1）ZnO, Sb are equipped with proportion2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3；
In the present embodiment, based on molfraction, the ratio of the raw material of outfit is：100 parts of ZnO, Sb2O30.26 part, Co2O3 0.26 part, Bi2O30.26 part, Ni2O30.26 part, Cr2O30.26 part, MnNb2O60.26 part, Al2O30.35 part, Firebrake ZB 0.35 part, LiNO30.35 part, MnSiO30.35 part；
（2）Prepare additive slurry
By step（1）Provisioned Sb2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3Mixing, obtains compound；Then pure water is added into compound and ammonium salt dispersant carries out ball milling, each component is mixed Uniformly, additive slurry is obtained；
This step（2）In, carry out ball milling when, the addition of ammonium salt dispersant is the 1% of compound gross weight, by the compound of ball milling, Balls, the part by weight of water used are：Compound:Ball:Water=1:3: 0.7；
（3）Prepare spraying slurry
By step（1）Provisioned ZnO is added in additive slurry, and adds polyvinyl alcohol water solution, obtains mixed slurry； Then ball milling is carried out to mixed slurry, when the proportion for being milled to mixed slurry is 1.8 and viscosity is 100cps, obtains spraying material Slurry；
This step（3）In, the solid content of the polyvinyl alcohol water solution added is ZnO, Sb2O3、Co2O3、Bi2O3、Ni2O3、 Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3And MnSiO3Gross weight 1%；
（4）Using spray drying tower to step（3）Obtain spraying slurry and carry out mist projection granulating, obtain powder；
（5）Through dry-pressing formed（Powder is carried out in 100Mpa pressure dry-pressing formed）, by step（4）Obtained powder pressing into Green sheet（The disk that green sheet is a diameter of 23mm, thickness is 2mm)；
（6）By step（5）Obtained green sheet is excluded after polyvinyl alcohol（Green sheet is placed in the environment of 520 DEG C and excludes poly- second Enol）, 3 hours are incubated in the environment of temperature is 1200 DEG C, green sheet is sintered, obtains high-potential gracient high nonlinear coefficient Zinc oxide varistor medium.
In the two-face printing silver electrode of obtained high-potential gracient high nonlinear coefficient zinc oxide varistor dieelctric sheet Slurry, obtains argent electrode layer through 600 DEG C of reduction, that is, forms metal electrode；Then it is tin plating in the welding of two sides metal electrode Copper lead, then dip-coating high-temp epoxy insulated paint, cured rear reheating apply powder epoxy encapsulating material, and pressure-sensitive electricity is can obtain after solidification Device is hindered, electric performance test sample is used as.
Embodiment 2
First, with Solid phase synthesis MnNb2O6、MnSiO3。
MnNb2O6Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5 It is ground and is well mixed；Again by MnCO3And Nb2O5Mixed material be put into alumina crucible, at 1150 DEG C be incubated 120 minutes, obtain MnNb2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
MnSiO3Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And SiO2, then to MnCO3And SiO2Enter Row grinds and is well mixed；Again by MnCO3And SiO2Mixed material be put into alumina crucible, at 1250 DEG C be incubated 120 points Clock, obtains MnSiO3.Obtained MnSiO3After cooling, ground and 200 mesh sieves excessively are standby.
Then, it is prepared according to the following steps high-potential gracient high nonlinear coefficient zinc oxide varistor medium：
（1）ZnO, Sb are equipped with proportion2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3；
In the present embodiment, based on molfraction, the ratio of the raw material of outfit is：100 parts of ZnO, Sb2O31.0 parts, Co2O3 1.0 parts, Bi2O31.0 parts, Ni2O31.0 parts, Cr2O31.0 parts, MnNb2O61.0 parts, Al2O30.6 part, 0.6 part of Firebrake ZB, LiNO30.6 part, MnSiO30.6 part；
（2）Prepare additive slurry
By step（1）Provisioned Sb2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3Mixing, obtains compound；Then pure water is added into compound and ammonium salt dispersant carries out ball milling, each component is mixed Uniformly, additive slurry is obtained；
This step（2）In, when carrying out ball milling, the addition of ammonium salt dispersant is the 1.3% of compound gross weight, by the mixing of ball milling Material, balls, the part by weight of water used are：Compound:Ball:Water=1:3: 0.6；
（3）Prepare spraying slurry
By step（1）Provisioned ZnO is added in additive slurry, and adds polyvinyl alcohol water solution, obtains mixed slurry； Then ball milling is carried out to mixed slurry, when the proportion for being milled to mixed slurry is 1.5 and viscosity is 40cps, obtains slurry of spraying；
This step（3）In, the solid content of the polyvinyl alcohol water solution added is ZnO, Sb2O3、Co2O3、Bi2O3、Ni2O3、 Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3And MnSiO3Gross weight 1.5%；
（4）Using spray drying tower to step（3）Obtain spraying slurry and carry out mist projection granulating, obtain powder；
（5）Through dry-pressing formed（Powder is carried out in 100Mpa pressure dry-pressing formed）, by step（4）Obtained powder pressing into Green sheet（The disk that green sheet is a diameter of 23mm, thickness is 2mm)；
（6）By step（5）Obtained green sheet is excluded after polyvinyl alcohol（Green sheet is placed in the environment of 550 DEG C and excludes poly- second Enol）, 2 hours are incubated in the environment of temperature is 1250 DEG C, green sheet is sintered, obtains high-potential gracient high nonlinear coefficient Zinc oxide varistor medium.
In the two-face printing silver electrode of obtained high-potential gracient high nonlinear coefficient zinc oxide varistor dieelctric sheet Slurry, obtains argent electrode layer through 600 DEG C of reduction, that is, forms metal electrode；Then it is tin plating in the welding of two sides metal electrode Copper lead, then dip-coating high-temp epoxy insulated paint, cured rear reheating apply powder epoxy encapsulating material, and pressure-sensitive electricity is can obtain after solidification Device is hindered, electric performance test sample is used as.
Embodiment 3
First, with Solid phase synthesis MnNb2O6、MnSiO3。
MnNb2O6Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5 It is ground and is well mixed；Again by MnCO3And Nb2O5Mixed material be put into alumina crucible, at 1200 DEG C be incubated 120 minutes, obtain MnNb2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
MnSiO3Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And SiO2, then to MnCO3And SiO2Enter Row grinds and is well mixed；Again by MnCO3And SiO2Mixed material be put into alumina crucible, at 1200 DEG C be incubated 120 points Clock, obtains MnSiO3.Obtained MnSiO3After cooling, ground and 200 mesh sieves excessively are standby.
Then, it is prepared according to the following steps high-potential gracient high nonlinear coefficient zinc oxide varistor medium：
（1）ZnO, Sb are equipped with proportion2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3；
In the present embodiment, based on molfraction, the ratio of the raw material of outfit is：100 parts of ZnO, Sb2O30.7 part, Co2O3 0.7 part, Bi2O30.7 part, Ni2O30.7 part, Cr2O30.7 part, MnNb2O60.7 part, Al2O30.3 part, 0.3 part of Firebrake ZB, LiNO30.3 part, MnSiO30.3 part；
（2）Prepare additive slurry
By step（1）Provisioned Sb2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3Mixing, obtains compound；Then pure water is added into compound and ammonium salt dispersant carries out ball milling, each component is mixed Uniformly, additive slurry is obtained；
This step（2）In, when carrying out ball milling, the addition of ammonium salt dispersant is the 0.5% of compound gross weight, by the mixing of ball milling Material, balls, the part by weight of water used are：Compound:Ball:Water=1:3: 1.0；
（3）Prepare spraying slurry
By step（1）Provisioned ZnO is added in additive slurry, and adds polyvinyl alcohol water solution, obtains mixed slurry； Then ball milling is carried out to mixed slurry, when the proportion for being milled to mixed slurry is 2.2 and viscosity is 200cps, obtains spraying material Slurry；
This step（3）In, the solid content of the polyvinyl alcohol water solution added is ZnO, Sb2O3、Co2O3、Bi2O3、Ni2O3、 Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3And MnSiO3Gross weight 0.8%；
（4）Using spray drying tower to step（3）Obtain spraying slurry and carry out mist projection granulating, obtain powder；
（5）Through dry-pressing formed（Powder is carried out in 100Mpa pressure dry-pressing formed）, by step（4）Obtained powder pressing into Green sheet（The disk that green sheet is a diameter of 23mm, thickness is 2mm)；
（6）By step（5）Obtained green sheet is excluded after polyvinyl alcohol（Green sheet is placed in the environment of 500 DEG C and excludes poly- second Enol）, 4 hours are incubated in the environment of temperature is 1100 DEG C, green sheet is sintered, obtains high-potential gracient high nonlinear coefficient Zinc oxide varistor medium.
In the two-face printing silver electrode of obtained high-potential gracient high nonlinear coefficient zinc oxide varistor dieelctric sheet Slurry, obtains argent electrode layer through 600 DEG C of reduction, that is, forms metal electrode；Then it is tin plating in the welding of two sides metal electrode Copper lead, then dip-coating high-temp epoxy insulated paint, cured rear reheating apply powder epoxy encapsulating material, and pressure-sensitive electricity is can obtain after solidification Device is hindered, electric performance test sample is used as.
Embodiment 4
In the case where other parts are same as Example 1, the present embodiment and the difference of embodiment 1 are ZnO, Sb2O3、 Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3And MnSiO3Consumption it is different.In the present embodiment, press Molfraction meter, the ratio of the raw material of outfit is：100 parts of ZnO, Sb2O31.2 parts, Co2O31.2 parts, Bi2O31.2 parts, Ni2O31.2 parts, Cr2O31.2 parts, MnNb2O61.2 parts, Al2O30.6 part, 0.6 part of Firebrake ZB, LiNO30.6 part, MnSiO30.6 part.
Embodiment 5
In the case where other parts are same as Example 2, the present embodiment and the difference of embodiment 2 are ZnO, Sb2O3、 Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3And MnSiO3Consumption it is different.In the present embodiment, press Molfraction meter, the ratio of the raw material of outfit is：100 parts of ZnO, Sb2O30.3 part, Co2O30.3 part, Bi2O30.6 part, Ni2O30.6 part, Cr2O30.6 part, MnNb2O60.6 part, Al2O30.35 part, 0.35 part of Firebrake ZB, LiNO30.35 part, MnSiO30.33 part.
Embodiment 6
In the case where other parts are same as Example 3, the present embodiment and the difference of embodiment 3 are ZnO, Sb2O3、 Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3And MnSiO3Consumption it is different.In the present embodiment, press Molfraction meter, the ratio of the raw material of outfit is：100 parts of ZnO, Sb2O30.8 part, Co2O30.8 part, Bi2O30.3 part, Ni2O30.3 part, Cr2O30.3 part, MnNb2O60.3 part, Al2O30.35 part, 0.35 part of Firebrake ZB, LiNO30.35 part, MnSiO30.35 part.
Using the pressure sensitive voltage of Method of constant flow source testing example 1-6 samples（V1mA）And V0.1mA, using constant pressure source（Voltage is adjusted For 83%V1mA）The leakage current of testing example 1-6 samples, the nonlinear factor α values of sample are calculated using correlation formula.Bear Pulse current impact capacity is the key that pressure cell results in practical application.1-6 sample pulse shocks of the embodiment of the present invention Test waveform is that 8/20 μ s simulate lightning wave, and peak point current desired value is 5000A, the pressure of test sample before and after pulse shock test Quick voltage, calculates pressure sensitive voltage rate of change, and observes judgement sample and bear the surface structure after pulse shock, if pressure sensitive voltage V1mA rates of change are within ± 10%, and sample bears surface structure after pulse shock and has no destruction, then judges that the sample is born Pulse shock performance is qualified, otherwise judges the sample for failure.Specific performance is as shown in table 1.
As it can be seen from table 1 the zinc oxide varistor medium prepared by 1-6 of the embodiment of the present invention has high current potential Gradient, electric potential gradient is 534-692V/mm；Nonlinear factor is more than 70, specially 71-89；Pulse shock tolerance is strong, can For electric lightning or the lightning protection overvoltage protection of other power electronic circuits.
The performance of zinc oxide varistor medium made from the various embodiments of the present invention of table 1

Claims (7)

1. a kind of high-potential gracient high nonlinear coefficient zinc oxide varistor medium, it is characterised in that based on molfraction, Consisting of：100 parts of ZnO, Sb2O30.03-1.5 parts, Co2O30.03-1.5 parts, Bi2O30.03-1.5 parts, Ni2O3 0.03-1.5 parts, Cr2O30.03-1.5 parts, MnNb2O60.03-1.5 parts, Al2O30.03-0.8 parts, Firebrake ZB 0.03-0.8 Part, LiNO30.03-0.8 parts, MnSiO30.03-0.8 parts.
2. high-potential gracient high nonlinear coefficient zinc oxide varistor medium according to claim 1, its feature exists In the MnNb2O6Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5Enter Row grinds and is well mixed；Again by MnCO3And Nb2O5Mixed material be put into alumina crucible, at 1150-1200 DEG C protect Temperature 120 minutes, obtains MnNb2O6。
3. high-potential gracient high nonlinear coefficient zinc oxide varistor medium according to claim 1, its feature exists In the MnSiO3Prepared using following technique：By 1：1 mol ratio is equipped with MnCO3And SiO2, then to MnCO3And SiO2Carry out Grind and be well mixed；Again by MnCO3And SiO2Mixed material be put into alumina crucible, at 1200-1250 DEG C be incubated 120 minutes, obtain MnSiO3。
4. the preparation method of the high-potential gracient high nonlinear coefficient zinc oxide varistor medium described in claim 1, its It is characterised by comprising the steps：
（1）ZnO, Sb are equipped with proportion2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3；
（2）Prepare additive slurry
By step（1）Provisioned Sb2O3、Co2O3、Bi2O3、Ni2O3、Cr2O3、MnNb2O6、Al2O3, Firebrake ZB, LiNO3With MnSiO3Mixing, obtains compound；Then pure water is added into compound and ammonium salt dispersant carries out ball milling, each component is mixed Uniformly, additive slurry is obtained；
（3）Prepare spraying slurry
By step（1）Provisioned ZnO is added in additive slurry, and adds polyvinyl alcohol water solution, obtains mixed slurry； Then ball milling is carried out to mixed slurry, when the proportion for being milled to mixed slurry is 1.5-2.2 and viscosity is 40-200cps, obtained Spraying slurry；
（4）Using spray drying tower to step（3）Obtain spraying slurry and carry out mist projection granulating, obtain powder；
（5）Through dry-pressing formed, by step（4）Obtained powder pressing is into green sheet；
（6）By step（5）Obtained green sheet is excluded after polyvinyl alcohol, and 2-4 is incubated in the environment of temperature is 1100-1250 DEG C Hour, green sheet is sintered, high-potential gracient high nonlinear coefficient zinc oxide varistor medium is obtained.
5. the preparation side of high-potential gracient high nonlinear coefficient zinc oxide varistor medium according to claim 4 Method, it is characterised in that：Step（2）In, when carrying out ball milling, the addition of ammonium salt dispersant is the 0.5-1.3% of compound gross weight, Part by weight by the compound of ball milling, balls, water used is：Compound:Ball:Water=1:3:(0.6-1.0).
6. the preparation side of high-potential gracient high nonlinear coefficient zinc oxide varistor medium according to claim 4 Method, it is characterised in that：Step（3）In, the solid content of the polyvinyl alcohol water solution added is ZnO, Sb2O3、Co2O3、Bi2O3、 Ni2O3、Cr2O3、MnNb2O6 、Al2O3, Firebrake ZB, LiNO3And MnSiO3Gross weight 0.8-1.6%.
7. the preparation side of high-potential gracient high nonlinear coefficient zinc oxide varistor medium according to claim 4 Method, it is characterised in that：Step（6）In, exclude polyvinyl alcohol in the environment of green sheet is placed in into 500-550 DEG C.
CN201710487871.4A 2017-06-23 2017-06-23 A kind of high-potential gracient high nonlinear coefficient zinc oxide varistor medium and preparation method thereof Pending CN107324797A (en)

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CN108774061A (en) * 2018-06-26 2018-11-09 东莞市瓷谷电子科技有限公司 A kind of high-performance zinc oxide pressure-sensitive resistor medium material and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN102584206A (en) * 2012-01-19 2012-07-18 深圳顺络电子股份有限公司 Zinc oxide pressure-sensitive resistor raw material
CN105272208A (en) * 2015-11-07 2016-01-27 汕头高新区松田实业有限公司 Zinc oxide piezoresistor dielectric material and preparation method thereof

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN102584206A (en) * 2012-01-19 2012-07-18 深圳顺络电子股份有限公司 Zinc oxide pressure-sensitive resistor raw material
CN105272208A (en) * 2015-11-07 2016-01-27 汕头高新区松田实业有限公司 Zinc oxide piezoresistor dielectric material and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108774061A (en) * 2018-06-26 2018-11-09 东莞市瓷谷电子科技有限公司 A kind of high-performance zinc oxide pressure-sensitive resistor medium material and preparation method thereof
CN108774061B (en) * 2018-06-26 2021-06-01 东莞市瓷谷电子科技有限公司 High-performance zinc oxide piezoresistor dielectric material and preparation method thereof

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Application publication date: 20171107