A kind of preparation method of zinc oxide resistor sheet

A zinc oxide resistor sheet and zinc oxide powder technology, applied in the field of ceramic materials, can solve the problems of corrosion of metal molds, limited application, poor economy, etc., and achieve the effects of simple preparation method, simple operation and low cost
CN113149634BActive Publication Date: 2022-05-27STATE GRID HUNAN ELECTRIC POWER +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID HUNAN ELECTRIC POWER
Publication Date
2022-05-27

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Abstract

The invention discloses a preparation method of a zinc oxide resistance sheet, which comprises the following steps: (1) dissolving a doped metal salt, adding zinc oxide powder, and stirring evenly to obtain a mixed liquid to be precipitated; (2) adding the mixed liquid to be precipitated Adding a precipitating agent in the mixture, and carrying out precipitation reaction to obtain a composite powder doped with metal salt precipitates wrapped in zinc oxide; (3) filtering, washing, and drying the composite powder to obtain a prefabricated powder; (4) prefabricating the prefabricated powder First cold sintering to obtain a prefabricated green body; (5) performing secondary high-temperature sintering on the prefabricated green body to obtain a high-temperature sintered green body; (6) performing surface treatment on the high-temperature sintered green body to obtain a zinc oxide resistor. The zinc oxide resistance plate grain uniformity of the preparation method of the invention is better, the grain is smaller, and the comprehensive performance is good.
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Description

technical field

[0001] The invention belongs to the field of ceramic materials, and in particular relates to a preparation method of a resistor sheet. Background technique

[0002] Zinc oxide resistor is a varistor ceramic with nonlinear volt-ampere characteristics, which is used to prevent lightning tripping of electrical equipment. Most traditional zinc oxide resistors are prepared by traditional solid-phase sintering method (such as patents CN105884345A, CN101950648A, CN101503292A, CN110078494A), and after grinding metal oxide powders such as zinc oxide, bismuth oxide, antimony oxide, cobalt oxide, manganese oxide, and nickel oxide Granulation, tablet pressing and sintering to make finished resistor sheet. The process uses a sintering temperature above 1100°C to sinter the metal oxide particles into a zinc oxide resistor sheet. High temperature sintering is easy to cause oxide particles to agglomerate, so the internal grain size of the resistor chip is larger. The pote...

Claims

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