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A kind of alumina ceramic skeleton for transformer and preparation method thereof

A technology of alumina ceramics and transformers, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc. It can solve problems affecting appearance and service life, deformation of ceramic skeleton products, and lower pass rate of finished products, so as to maintain stability And the effects of uniformity, improving pass rate, and improving compatibility

Active Publication Date: 2022-05-13
LIWEIXING ELECTRONICS SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alumina material is an inorganic material. The molding methods of its products mainly include dry pressing, grouting, extrusion, cold isostatic pressing, injection, casting, hot pressing and hot isostatic pressing. However, during the sintering process of alumina ceramics, the volume of the green body will gradually shrink, and the finished product will shrink by 10-20%, which will easily cause deformation of the finished ceramic skeleton and easily The phenomenon of warping and cracking will affect its appearance and service life, and reduce the qualified rate of finished products

Method used

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  • A kind of alumina ceramic skeleton for transformer and preparation method thereof
  • A kind of alumina ceramic skeleton for transformer and preparation method thereof
  • A kind of alumina ceramic skeleton for transformer and preparation method thereof

Examples

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preparation example 1

[0029] Preparation Example 1: Get 20kg of kaolin, add 40kg of nitric acid solution with a volume fraction of 2%, stir for 6 hours, wash it with ethanol solution to obtain acidified kaolin; add 3kg of magnesia and 1kg of stearic acid to the acidified kaolin, Wet ball milling in a ball mill with ethanol solution as solvent for 6 hours to obtain the mixture; place the mixture at a temperature of 130°C, dry it for 6 hours, then place it at a temperature of 800°C and calcinate for 3 hours to obtain modified kaolin .

preparation example 2

[0030] Preparation Example 2: Take 25kg of kaolin, add 45kg of nitric acid solution with a volume fraction of 2%, stir for 7 hours, and wash it with ethanol solution to obtain acidified kaolin; add 4kg of magnesia and 1.5kg of stearic acid to the acidified kaolin , wet ball milling in a ball mill using ethanol solution as a solvent for 7 hours to obtain a mixture; place the mixture at a temperature of 140°C and dry it for 7 hours, then place it at a temperature of 850°C and calcinate for 3.5 hours to obtain a modified Sexual kaolin.

preparation example 3

[0031] Preparation example 3: get 30kg of kaolin, add 50kg of nitric acid solution with a volume fraction of 2% therein, after stirring for 8h, wash it with ethanol solution to obtain acidified kaolin; add 5kg of magnesia and 2kg of stearic acid to the acidified kaolin, Wet ball milling in a ball mill using ethanol solution as a solvent for 8 hours to obtain a mixture; place the mixture at a temperature of 150°C and dry it for 8 hours, then place it at a temperature of 900°C and calcinate it for 4 hours to obtain a modified kaolin .

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Abstract

The invention discloses an alumina ceramic skeleton for a transformer and a preparation method thereof. The preparation method of an alumina ceramic skeleton for a transformer comprises the following steps: taking alumina, modified kaolin, lithium-based bentonite, silicon nitride, sintering Auxiliaries and skeleton binders, which are pulverized, ball milled, solidified and sintered to obtain alumina ceramic skeletons for transformers. The invention can reduce the shrinkage of the green body during sintering and reduce the deformation, edge warping and cracking of the ceramic skeleton through the combination of the modified kaolin, the lithium-based bentonite and the skeleton binder.

Description

technical field [0001] The invention relates to the technical field of transformer framework materials, more specifically, it relates to an alumina slurry for a transformer alumina ceramic framework and a preparation method thereof. Background technique [0002] The transformer frame, also known as the transformer wire frame, is the main structural part of the transformer. Its main function is to increase the winding space for the copper wire in the transformer; the traditional transformer frame material is made of phenolic resin with excellent insulation performance, but due to phenolic Resin has low electrical conductivity and poor heat dissipation performance. When it is used in transformer skeleton, it is not conducive to the heat dissipation of transformer. Therefore, alumina ceramic material with excellent insulation performance and heat dissipation performance is more suitable for making transformer skeleton. [0003] Alumina ceramics are a kind of aluminum oxide (Al ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/626C04B35/634H01F41/00
CPCC04B35/10C04B35/622C04B35/62605C04B35/63496C04B35/63416H01F41/00C04B2235/349C04B2235/3244C04B2235/3225C04B2235/3873C04B2235/3206C04B2235/6562C04B2235/6567C04B2235/96
Inventor 李小华陈友林孙标山
Owner LIWEIXING ELECTRONICS SHENZHEN
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