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Sintering aid and quartz ceramics and their preparation and application methods

A technology of quartz ceramics and sintering aids, applied in the field of quartz ceramic materials, can solve the problems of easy crystallization, damage to application value, high sintering temperature, and achieve the effects of large application value, low cost and simple preparation process

Active Publication Date: 2022-03-22
ELECTROMECHANICAL ENG INST OF SICHUAN AEROSPACE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fused silica ceramics currently used have a high sintering temperature, and during the sintering process, as the temperature rises, crystallization is prone to occur, resulting in obvious performance decline and damaging its application value.

Method used

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  • Sintering aid and quartz ceramics and their preparation and application methods
  • Sintering aid and quartz ceramics and their preparation and application methods

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0066] 3. Preparation method of quartz ceramics

[0067] The preparation method at least comprises the following steps:

[0068] (1) Add the sintering aid to the fused silica powder to obtain a mixed raw material, and add deionized water and ball milling media to the mixed raw material;

[0069] (2) Ball milling;

[0070] (3) Heating the slurry obtained by ball milling, and then sieving;

[0071] (4) Granulate the sieved mixture;

[0072] (5) Dry press the granulated mixture, the dry pressure is 80~120MPa, and hold the pressure twice, the first holding time is 45~60s, and the second holding time is 20~30s ;

[0073] (6) Sintering the pressed mixture at 1150-1300° C. to obtain the quartz ceramics.

[0074] During specific implementation, the raw material fused silica powder can be prepared by the technical staff or purchased on the market.

[0075] During specific implementation, the ball milling medium can be selected or adjusted according to actual needs, for example, a...

Embodiment 1

[0096] According to the above preparation method, and specifically adjust the composition ratio of quartz and sintering aids and the sintering temperature, the quartz ceramic samples numbered 1~5 are obtained, as shown in the following table:

[0097]

Embodiment 2

[0099] According to the above preparation method, and specifically adjust the composition ratio of quartz and sintering aids and the sintering temperature, the quartz ceramic samples numbered 6~10 are obtained, as shown in the following table:

[0100]

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PUM

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Abstract

The invention discloses a sintering aid, quartz ceramics and a preparation and application method thereof. The sintering aid includes lanthanum oxide, aluminum oxide, boron oxide, neodymium oxide and yttrium oxide. The quartz ceramics are obtained by sintering the sintering aid and quartz at a certain temperature. The raw material cost of the quartz ceramics prepared by the present invention is low, the preparation process is simple, the product does not contain heavy metals, no pollution, and the product has a compact and stable microstructure. , no devitrification occurs during the sintering process, it can be used as a wave-transparent material, especially a radome material, and is widely used in many fields such as aviation, aerospace, optics, electronics, glass, and metallurgy.

Description

technical field [0001] The invention relates to the technical field of quartz ceramic materials. Background technique [0002] Wave-transparent material is a multifunctional dielectric material that can pass through electromagnetic waves without changing its properties. It is widely used in daily communications, rockets, spacecraft, guided weapons, satellites and other fields. It is mainly used as antenna window or radome material to use. [0003] Wave-transparent materials are structural-heat-resistant-wave-transparent functional materials. Due to the particularity of the use environment, they usually need to meet the requirements of heat insulation, load bearing, impact resistance, wave transmission, weather resistance, and air tightness at the same time. strict requirements. The selection of raw materials is very critical for wave-transparent materials to meet these requirements. In the prior art, the raw materials of wave-transparent materials are mainly divided into t...

Claims

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Application Information

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IPC IPC(8): C04B35/64C04B35/14C04B35/622
CPCC04B35/14C04B35/622C04B35/64C04B2235/77C04B2235/96
Inventor 段舒心陈育阳李毅梁霄石继梅刘福东李晓波
Owner ELECTROMECHANICAL ENG INST OF SICHUAN AEROSPACE
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