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Preparation process of low-voltage nano-zinc oxide film varistor

A technology of nano-zinc oxide and varistor, which is applied in the field of preparation process of low-voltage nano-zinc oxide film varistor, which can solve the problem that varistor is difficult to meet the practical application requirements, the pressure-sensitive performance and its stability are poor, and the performance of the film is reduced and other issues, to achieve the effects of good aging performance, low cost, and excellent electrical properties

Pending Publication Date: 2016-11-02
西安立伟电子科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in the preparation of ZnO ceramic thin-film varistors, the film thickness used is generally tens to hundreds of nm. Because the film thickness is too small, the pressure-sensitive performance and stability are relatively poor, making it difficult for varistors to achieve Practical application requirements
To optimize its performance, it is necessary to increase the film thickness, and the increase of film thickness is prone to cracks, which will reduce the performance of the film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) In 10mol ZnO sol, add 8mol bismuth ion Bi 3+ , 5mol antimony ion Sb 3+ , 4mol manganese ion Mn 2+ , 6mol chromium ion 2molCr 3+ And 1mol cobalt ion Co 3+ , heat up, mix and stir, add 0.5mol zirconium balls and 10ml absolute ethanol, and planetary ball mill for 6 hours;

[0016] 2) Then dry at 60°C until completely dried to obtain ZnO nanopowder;

[0017] 3) crush the powder dried in step 2) with a mortar, add polyvinyl alcohol aqueous solution with a mass concentration of 5%, granulate, and then bake in an oven at 80°C to obtain granulated powder;

[0018] 4) pressing the powder obtained in step 3) into a green body, and then sintering;

[0019] 5) Silver printing, reduction, welding and encapsulation of the sintered porcelain pieces.

Embodiment 2

[0021] 1) In 15mol ZnO sol, doped with 10mol bismuth ion Bi 3+ , 8mol antimony ion Sb 3+ , 6mol manganese ion Mn 2+ , 9mol chromium ion 4molCr 3+ and 2mol cobalt ion Co 3+ , heat up, mix and stir, add 1mol zirconium balls and 10ml absolute ethanol, and planetary ball mill for 8 hours;

[0022] 2) Then dry at 80°C until completely dried to obtain ZnO nanopowder;

[0023] 3) crush the powder dried in step 2) with a mortar, add polyvinyl alcohol aqueous solution with a mass concentration of 5%, granulate, and then bake in an oven at 100°C to obtain granulated powder;

[0024] 4) pressing the powder obtained in step 3) into a green body, and then sintering;

[0025] 5) Silver printing, reduction, welding and encapsulation of the sintered porcelain pieces.

[0026] Compared with the prior art, the invention has simple process and low cost, and the invented product has excellent electrical performance, good aging performance, strong combined wave resistance, high energy densit...

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PUM

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Abstract

The present invention relates to the preparation technology of low-voltage nano-zinc oxide film varistor, and concrete steps are: 1) first in ZnO sol, dope bismuth ion Bi3+, antimony ion Sb3+, manganese ion Mn2+, chromium ion Cr3+ and cobalt ion Co3+, heat up Mix and stir, add zirconium balls and absolute ethanol, and planetary ball mill for 6 to 8 hours; 2) Then dry at 60°C to 80°C until completely dried to obtain ZnO nanopowder; 3) Combine step 2) The powder dried in the medium is crushed with a mortar, and a polyvinyl alcohol aqueous solution with a mass concentration of 5% is added, granulated, and then baked in an oven at 80°C to 100°C to obtain a granulated powder; 4) Step 3) The obtained powder is pressed into a green body with a weight of 0.98-1.05g, and then sintered; 5) silver printing, reduction, welding and encapsulation of the sintered ceramic sheet.

Description

technical field [0001] The invention relates to a preparation process of a low-voltage nanometer zinc oxide film varistor. Background technique [0002] Varistor is a voltage-limiting protection device with large current processing and energy absorption capabilities. It plays an important role in protecting the safety of electrical equipment and ensuring the normal and stable operation of electronic equipment. It is widely used in aviation, aerospace, electric power, post and telecommunications, Railways, automobiles, household appliances and other fields. [0003] At present, in the preparation of ZnO ceramic thin-film varistors, the film thickness used is generally tens to hundreds of nm. Because the film thickness is too small, the pressure-sensitive performance and stability are relatively poor, making it difficult for varistors to achieve Practical application requirements. In order to optimize its performance, it is necessary to increase the film thickness, and the i...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/622
Inventor 闫宁
Owner 西安立伟电子科技有限责任公司