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High-joule type voltage dependent resistor and production method thereof

A technology of piezoresistors and raw materials, which is applied in the field of high-joule piezoresistors and its preparation, can solve the problems of poor performance of piezoresistors, waste water and liquid pollution, and low manufacturing costs, and achieve strong combined wave resistance and process Simple, low-cost-to-manufacture effect

Active Publication Date: 2014-03-05
GUANGXI NEW FUTURE INFORMATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The way to improve the energy absorption capacity of high-joule varistors is mainly by improving the uniformity of the entire resistor grain. Commonly used methods include pyrolysis of nitrate, sol-gel method, co-precipitation method, plasma gas phase reaction and other chemical methods. Nanoscale varistor composite powder, or some powder, such as patents CN101531507A, CN1273424A, CN 102390993A, CN1614720A, but these wet chemical methods all have the problem of waste water and liquid pollution and difficult treatment, large investment and low output
Therefore, most commercial products currently use high-energy ball milling and traditional solid-state sintering methods to prepare varistors, such as patents CN 102603284A, CN 102515741A, and CN 102515740A. Although these patent applications have simple processes, low manufacturing costs, and little pollution, they are suitable for High-volume production, but the current and energy capacity performance is relatively poor compared to the performance of varistors manufactured by wet chemical methods

Method used

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  • High-joule type voltage dependent resistor and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of a high-joule varistor is carried out according to the following steps:

[0023] 1. First weigh 26.0761 grams of industrial superior grade ZnO powder and analyze the pure raw material Nb 2 o 5 85.1420 g, TiO 2 25.5819 grams obtain mixed powder;

[0024] 2. Add 547.2 grams of zirconium balls and 273.6 grams of deionized water to the mixed powder weighed in step 1, wet ball mill and mix for 4 hours, dry quickly at 130°C until completely dried, and then calcined at 1050°C for 4 hours to obtain ZnTiNb 2 o 8 Pre-fired powder;

[0025] 3. The ZnTiNb in step 2 2 o 8 Add 513 grams of zirconium balls and 220 milliliters of absolute ethanol to the calcined powder, planetary ball mill for 8 hours, pass all the ball-milled mixture through a 325-mesh molecular sieve, and then dry slowly at 80°C until completely dried to obtain 136.8 g ZnTiNb 2 o 8 ultrafine powder;

[0026] 4. Weigh and analyze the pure raw material 6861.5 g Bi respectively 2...

Embodiment 2

[0033] A preparation method of a high-joule varistor is carried out according to the following steps:

[0034] 1. First weigh 103.4274 grams of industrial superior grade ZnO powder and analyze the pure raw material Nb 2 o 5 337.705 grams, TiO 2 101.4676 grams obtain mixed powder;

[0035] 2. Add 2,034.75 grams of zirconium balls and 813.9 grams of deionized water to the mixed powder weighed in step 1, wet ball mill and mix for 4 hours, dry quickly at 150°C until completely dried, and then calcined at 1100°C for 3 hours to obtain ZnTiNb 2 o 8 Pre-fired powder;

[0036] 3. The ZnTiNb in step 2 2 o 8 Add 2170.4 grams of zirconium balls and 900 milliliters of absolute ethanol to the calcined powder, planetary ball mill for 8 hours, pass all the ball-milled mixture through a 325-mesh molecular sieve, and then dry slowly at 60°C until completely dried to obtain 542.6 g ZnTiNb 2 o 8 ultrafine powder;

[0037] 4. Weighing and analyzing 7696.3 grams of pure raw materia...

Embodiment 3

[0044] A preparation method of a high-joule varistor is carried out according to the following steps:

[0045] 1. First weigh 41.4587 grams of industrial superior grade ZnO powder and analyze the pure raw material Nb 2 o 5 135.3683 grams, TiO 2 40.6731 grams obtain mixed powder;

[0046] 2. Add 815.6 grams of zirconium balls and 435 grams of deionized water to the mixed powder weighed in step 1, wet ball mill and mix for 3 hours, dry quickly at 150°C until completely dried, and then calcined at 1075°C for 4 hours to obtain ZnTiNb 2 o 8 Pre-fired powder;

[0047] 3. The ZnTiNb in step 2 2 o 8Add 870 grams of zirconium balls and 360 milliliters of absolute ethanol to the calcined powder, planetary ball mill for 7 hours, pass all the ball-milled mixture through a 325-mesh molecular sieve, and then dry slowly at 60°C until completely dried to obtain 217.5 g ZnTiNb 2 o 8 ultrafine powder;

[0048] 4. Weighing and analyzing 7117.4 grams of pure raw materials respect...

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Abstract

The invention discloses a high-joule type voltage dependent resistor and a production method thereof. The voltage dependent resistor mainly comprises ZnO, and then raw materials of Bi2O3, Co3O4, Sb2O3, MnCO3, Ni2O3, ZrO2, Y2O3, SiO2, SnO2, MgO, H3BO3, Al(NO3)3.9H2O, AgNO3 and home-made ultrafine ZnTiNb2O8 powder are added to obtain the voltage dependent resistor. The production method comprises the steps that the ultrafine ZnTiNb2O8 powder is self-produced by using a conventional solid-phase synthesis method; then the ultrafine ZnTiNb2O8 powder, other additives and ZnO powder are subjected to ball-milling and mixed; and processes such as spray granulation, dry-pressing molding, binder removal and sintering are achieved to obtain a sintered ceramic chip, and the sintered ceramic chip is subjected to screen printing of silver paste, reduced, welded and packaged, so that the high-joule type voltage dependent resistor is obtained. According to the production method, the process is simple, and the produced voltage dependent resistor is low in cost, good in aging performance, high in combination wave resistance and energy density, environment-friendly and capable of achieving mass production.

Description

technical field [0001] The invention relates to a high-joule varistor and a preparation method thereof, belonging to the technical field of varistor preparation. Background technique [0002] With the continuous development of electronic information technology, varistors have the advantages of large current processing and energy absorption capabilities, low leakage current, and various surge withstand capabilities. They are widely used in communication equipment, electric power, electrical appliances, and lightning protection fields. The market prospect is very bright. The vastness has always been the focus of scientists' attention. After 50 years of development and research, so far, the potential gradient of zinc oxide varistors has been able to achieve dozens of series of 5~400V / mm, which can be applied from low-voltage integrated circuits to high-voltage / ultra-high-voltage power transmission and transformation systems. The diameter of the components can also range from 5...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/453C04B35/622
Inventor 褚冬进周军伟梁自伟覃远东常宝成刘丹陈玉萍
Owner GUANGXI NEW FUTURE INFORMATION IND
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