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A kind of preparation method of high-performance zinc oxide resistor sheet

A high-performance technology for zinc oxide resistors, applied in the manufacture of resistors, manufacturing resistor chips, resistors, etc., can solve the problem of low potential gradient, energy absorption capacity and current shock resistance, which cannot meet the requirements of ultra-high voltage arresters Devices, unfavorable miniaturization of zinc oxide resistors, etc., to avoid macroscopic uneven shrinkage, improve comprehensive electrical performance, and achieve volume miniaturization

Active Publication Date: 2020-09-29
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during high-temperature sintering, there is still the problem that bismuth oxide is easy to volatilize, leading to fluctuations in the original formula, which will deteriorate the electrical properties of the obtained resistor; The composition uniformity is poor, resulting in low potential gradient, energy absorption capacity and current shock withstand characteristics, so it cannot meet the needs of EHV / UHV arrester devices, and is not conducive to the miniaturization of zinc oxide resistors
[0004] Therefore, the existing technology has a large room for improvement

Method used

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  • A kind of preparation method of high-performance zinc oxide resistor sheet

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Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a high-performance zinc oxide resistance sheet, comprising the following steps:

[0026] (a) Take the raw material of zinc oxide resistor by weighing the raw material formula of zinc oxide resistor, mix the materials evenly after grinding, and obtain the powder mixture for subsequent use; wherein the raw material formula of zinc oxide resistor is composed of the following raw materials in mass percentage: zinc oxide 92%, bismuth oxide 1.5%, chromium oxide 1.2%, cobalt oxide 0.8%, silver oxide 1.1%, antimony oxide 1.2%, nickel oxide 0.8%, manganese oxide 0.6%, silicon oxide 0.8%;

[0027] (b) adding polyacrylic acid ammonium dispersant and polyvinyl alcohol binder solution to the powder mixture, then granulating, and pressing it into a zinc oxide resistor sheet green body;

[0028] (c) Place the green zinc oxide resistor sheet in the debinding chamber, control the temperature in the debinding chamber to be 350°C, and make the atmosphere pressure in...

Embodiment 2

[0032] A method for preparing a high-performance zinc oxide resistance sheet, comprising the following steps:

[0033] (a) take the raw material of zinc oxide resistor by weighing the raw material of zinc oxide resistor raw material formula, after grinding, mix evenly, obtain powder mixture for subsequent use; wherein said zinc oxide resistor raw material formula is the same as embodiment 1;

[0034] (b) adding polyacrylic acid ammonium dispersant and polyvinyl alcohol binder solution to the powder mixture, then granulating, and pressing it into a zinc oxide resistor sheet green body;

[0035] (c) Place the green zinc oxide resistor sheet in the debinding chamber, control the temperature in the debinding chamber to 380°C, and make the atmosphere pressure in the debinding chamber 40Mpa by introducing air into the debinding chamber. Degumming to obtain zinc oxide resistor blanks;

[0036] (d) placing the zinc oxide resistor sheet blank in a firing chamber, controlling the tempe...

Embodiment 3

[0039] A method for preparing a high-performance zinc oxide resistance sheet, comprising the following steps:

[0040] (a) take the raw material of zinc oxide resistor by weighing the raw material of zinc oxide resistor raw material formula, after grinding, mix evenly, obtain powder mixture for subsequent use; wherein said zinc oxide resistor raw material formula is the same as embodiment 1;

[0041] (b) adding polyacrylic acid ammonium dispersant and polyvinyl alcohol binder solution to the powder mixture, then granulating, and pressing it into a zinc oxide resistor sheet green body;

[0042] (c) Place the green zinc oxide resistor sheet in the debinding chamber, control the temperature in the debinding chamber to 400°C, and make the atmosphere pressure in the debinding chamber 50Mpa by feeding air into the debinding chamber. Degumming to obtain zinc oxide resistor blanks;

[0043] (d) placing the zinc oxide resistance sheet blank in a firing chamber, controlling the tempera...

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Abstract

The invention relates to the technical field of manufacturing zinc oxide lightning arrester, in particular to a method for preparing a high-performance zinc oxide resistor sheet, subsequently the steps of mixing, granulating, pressing, debinding, firing, spraying aluminum and coating high resistance layer and insulating glaze. By creatively designing the technological conditions of glue drainage and firing, a synergistic effect is obtained to compensate for that volatilization of organic matter in the glue discharge stage, pore defects caused by decomposition in zinc oxide resistor sheet and volatilization of bismuth oxide in firing stage, Improving the density and uniformity of zinc oxide resistor, improving the potential gradient of zinc oxide resistor, energy absorption capacity and current shock resistance, and improving the electrical performance of zinc oxide resistor as a whole, it is easy to meet the requirements of ultra / ultra high voltage lightning arrester devices, and is conducive to the volume miniaturization of the resistor.

Description

technical field [0001] The invention relates to the technical field of zinc oxide lightning arrester manufacture, in particular to a preparation method of a high-performance zinc oxide resistance sheet. Background technique [0002] Surge arresters are key equipment for power grids and power equipment to prevent lightning strikes and flashover accidents, and zinc oxide resistors are widely used in the manufacture of surge arresters because of their excellent nonlinear volt-ampere characteristics and impact energy absorption capacity. With the rapid development of the power industry, the requirements for surge arresters and zinc oxide resistors have also increased. Zinc oxide resistors are the core components of surge arresters, and their performance and manufacturing level directly restrict the development of surge arresters. Therefore, how to obtain high-performance zinc oxide resistors is an important research direction to improve the quality of arresters. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C17/00H01C17/30H01C7/12
CPCH01C7/12H01C17/006H01C17/30
Inventor 曹伟万帅谷山强陈家宏谭进王剑吕军刘新杜雪松许衡刘刚王智凯张瑞
Owner STATE GRID CORP OF CHINA
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