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Large-capacity small-size high-gradient alternating current zinc oxide resistor sheet and preparation process thereof

A zinc oxide resistor sheet and a technology for the preparation process, which are used in resistor manufacturing, resistors, varistors, etc., can solve the problems of large size and small potential gradient of large-capacity resistor sheets, and achieve small size, large capacitance, and suppress effect of growth

Active Publication Date: 2017-06-06
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, with the development of economy and society, the transmission capacity and voltage level of power transmission lines have been continuously improved, and the requirements for the safety and reliability of power transmission and transformation equipment have become higher and higher, and then the protection of power transmission lines and power transmission and transformation The surge arrester of the equipment also puts forward higher requirements, and the large-capacity resistors on the market generally have shortcomings such as large size and small potential gradient.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The invention provides a high-capacity, small-size, high-gradient AC zinc oxide resistance sheet and a preparation process thereof, comprising the following steps:

[0032] (1) Weighing: Weigh each component according to molar fraction: 96mol zinc oxide, 1mol antimony trioxide, 0.5mol bismuth trioxide, 0.3mol cobalt trioxide, 0.3mol tricobalt tetroxide, 0.4mol silicon dioxide, 0.6mol manganese dioxide, 0.7mol chromium trioxide, 0.2mol nickelous oxide, 0.2mol boron oxide, 0.06mol aluminum nitrate, 0.4mol yttrium trioxide, the purity of the zinc oxide is greater than or equal to 99.97%, and the remaining substances The purity of all are analytically pure;

[0033] (2) Ball milling and mixing: each component weighed is put into a high-energy ball mill for ball milling and mixing, and ammonium polyacrylate anionic surfactant is used as a dispersant, and ball milling is mixed for 6 hours to obtain a slurry;

[0034] (3) Drying: drying the slurry mixed by ball milling at a t...

Embodiment 2

[0044] The invention provides a high-capacity, small-size, high-gradient AC zinc oxide resistance sheet and a preparation process thereof, comprising the following steps:

[0045] (1) Weighing: Weigh each component according to molar fraction: 96mol zinc oxide, 1mol antimony trioxide, 0.5mol bismuth trioxide, 0.3mol cobalt trioxide, 0.3mol tricobalt tetroxide, 0.4mol silicon dioxide, 0.6mol manganese dioxide, 0.7mol chromium trioxide, 0.2mol nickelous oxide, 0.2mol boron oxide, 0.06mol aluminum nitrate, 0.4mol yttrium trioxide, the purity of the zinc oxide is greater than or equal to 99.97%, and the remaining substances The purity of all are analytically pure;

[0046] (2) Ball milling and mixing: each component weighed is put into a high-energy ball mill for ball milling and mixing, and ammonium polyacrylate anionic surfactant is used as a dispersant, and ball milling is mixed for 6 hours to obtain a slurry;

[0047] (3) Drying: drying the slurry mixed by ball milling at a t...

Embodiment 3

[0057] The invention provides a high-capacity, small-size, high-gradient AC zinc oxide resistance sheet and a preparation process thereof, comprising the following steps:

[0058] (1) Weighing: Weigh each component according to molar fraction: 98mol zinc oxide, 1mol antimony trioxide, 0.7mol bismuth trioxide, 0.3mol cobalt trioxide, 0.2mol tricobalt tetroxide, 0.5mol silicon dioxide, 0.5mol manganese dioxide, 0.5mol chromium oxide, 0.4mol nickel oxide, 0.2mol boron oxide, 0.06mol aluminum nitrate, 0.4mol yttrium oxide, the purity of the zinc oxide is greater than or equal to 99.97%, and the remaining substances The purity of all are analytically pure;

[0059] (2) Ball milling and mixing: each component weighed is put into a high-energy ball mill for ball milling and mixing, and ammonium polyacrylate anionic surfactant is used as a dispersant, and ball milling is mixed for 6 hours to obtain a slurry;

[0060] (3) Drying: drying the slurry mixed by ball milling at a temperatur...

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Abstract

The invention provides a large-capacity small-size high-gradient alternating current zinc oxide resistor sheet and a preparation process thereof; the product is prepared by, with a zinc oxide powder as a main material, properly adding antimonous oxide, bismuth trioxide, cobaltic oxide, cobaltosic oxide, silicon dioxide, manganese dioxide, chromic oxide and other metal oxides, and carrying out weighing, ball-milling mixing, drying, granulation, dry pressing molding, pre-sintering, high temperature sintering, sheet grinding, heat treatment, electrode spraying, glaze coating and other processes. The product has the advantages of large capacity, small size, high electric potential gradient, safety and reliability and the like, and is suitable for use of small-sized large-capacity lightning arresters; and the preparation process is simple and convenient, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the technical field of lightning arrester manufacture, in particular to a large-capacity, small-size, high-gradient AC zinc oxide resistance sheet and a preparation process thereof. Background technique [0002] Zinc oxide resistors are the core components of surge arresters in the power industry. Usually, zinc oxide powder is the main body, and an appropriate amount of other metal oxide additives are added, such as antimony trioxide, bismuth trioxide, dicobalt trioxide, tricobalt tetroxide, dicobalt Silicon oxide, manganese dioxide, chromium trioxide, etc., are made by weighing, ball milling, drying, granulation, dry pressing, pre-sintering, high-temperature firing, grinding, heat treatment, electrode spraying and glaze coating. It has excellent performances such as good nonlinearity, fast response speed, large surge resistance, stable pressure-sensitive characteristics and convenient manufacture, and has been widely used in v...

Claims

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Application Information

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IPC IPC(8): H01C7/12H01C17/00
CPCH01C7/12H01C17/00
Inventor 万帅陈家宏谷山强王剑吕军冯万兴刘熙曹伟刘新张伟杜雪松
Owner STATE GRID CORP OF CHINA
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