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

Active Publication Date: 2022-05-27
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current cold sintering method has the following problems: (1) It is necessary to use an aqueous solution of an acid such as acetic acid as an auxiliary sintering agent. The acid reacts with the metal oxide at high temperature to promote the fusion of grains, which is conducive to the low-temperature sintering of oxide grains into Porcelain, but the acid will corrode the metal mold at higher temperature, which limits the application of this process; (2) cold sintering of different metal oxides requires these metal oxide particles to have lower surface energy, so the metal oxides used need Nanoscale raw materials, poor economy

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  • A kind of preparation method of zinc oxide resistor sheet
  • A kind of preparation method of zinc oxide resistor sheet
  • A kind of preparation method of zinc oxide resistor sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0044] A preparation method of zinc oxide resistor sheet, comprising the following steps:

[0045] (1) Dissolve metal salts of 0.8 mol of bismuth salt, 0.9 mol of antimony salt, 0.9 mol of nickel salt, 1.0 mol of manganese salt, 0.9 mol of cobalt salt, 0.5 mol of chromium salt, and 0.001 mol of aluminum salt in 900 mol of ethylene glycol, and then 94.999 mol of zinc oxide powder (about 1 μm in diameter) was added to the ethylene glycol solution of the metal salt, and stirred uniformly to form a mixed liquid to be precipitated. Dissolve sodium hydroxide in 800 mol of water to obtain a precipitant solution;

[0046] (2) adding a precipitant solution to the mixed liquid to be precipitated obtained in step (1), heating to 90° C., adjusting the pH value to 10, and reacting for 2 h to obtain a composite powder coated with zinc oxide doped with metal salt precipitate;

[0047] (3) filtering, washing and drying the composite powder obtained in step (2) to obtain a prefabricated powde...

Embodiment 2

[0052] A preparation method of zinc oxide resistor sheet, comprising the following steps:

[0053] (1) Dissolve metal salts of 2.0 mol of bismuth salt, 1.5 mol of antimony salt, 1.5 mol of nickel salt, 1.0 mol of manganese salt, 1.0 mol of cobalt salt, 1.0 mol of chromium salt and 0.01 mol of aluminum salt in 900 mol of ethylene glycol, and then 94.999 mol of zinc oxide powder (about 1 μm in diameter) was added to the ethylene glycol solution of the metal salt, stirred evenly to form a mixed liquid to be precipitated; sodium hydroxide was dissolved in 800 mol of water to obtain a precipitant solution;

[0054] (2) adding a precipitant solution to the mixed liquid to be precipitated obtained in step (1), heating to 90° C., adjusting the pH value to 10, and reacting for 2 h to obtain a composite powder coated with zinc oxide doped with metal salt precipitate;

[0055] (3) filtering, washing and drying the composite powder obtained in step (2) to obtain a prefabricated powder;

...

Embodiment 3

[0060] A preparation method of zinc oxide resistor sheet, comprising the following steps:

[0061] (1) Dissolve metal salts of 0.8 mol of bismuth salt, 0.9 mol of antimony salt, 0.9 mol of nickel salt, 1.0 mol of manganese salt, 0.9 mol of cobalt salt, 0.5 mol of chromium salt, and 0.001 mol of aluminum salt in 900 mol of ethylene glycol, and then 94.999 mol of zinc oxide powder (about 1 μm in diameter) was added to the ethylene glycol solution of the metal salt, stirred evenly to form a mixed liquid to be precipitated; sodium hydroxide was dissolved in 800 mol of water to obtain a precipitant solution;

[0062] (2) adding a precipitant solution to the mixed liquid to be precipitated obtained in step (1), heating to 90° C., adjusting the pH value to 10, and reacting for 2 h to obtain a composite powder coated with zinc oxide doped with metal salt precipitate;

[0063] (3) filtering, washing and drying the composite powder obtained in step (2) to obtain a prefabricated powder; ...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/453C04B35/622C04B35/64C04B41/89
CPCC04B35/453C04B35/622C04B35/64C04B41/89C04B41/52C04B41/009C04B2235/443C04B2235/449C04B2235/444C04B2235/448C04B2235/606C04B2235/6562C04B2235/6567C04B2235/96C04B41/5155C04B41/5022
Inventor 陈宝辉陆佳政付志瑶王博闻潘碧宸梁平
Owner STATE GRID HUNAN ELECTRIC POWER
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