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Preparation method of fused silica ceramic revolving body

A technology of fused silica and fused silica powder, which is applied in the field of preparation of fused silica ceramic revolving bodies, can solve the problems of long molding time, easy shadowing of products, and high porosity, and achieves simple molding methods and solves the grouting molding process cycle Long-lasting, low-alcohol effect

Active Publication Date: 2019-09-06
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a fused silica ceramic revolving body, which solves the problems of long molding time, easy shadows and high porosity in the traditional molding process, and has the advantages of short preparation cycle, uniform product material and The characteristics of high density and broad promotion prospects

Method used

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  • Preparation method of fused silica ceramic revolving body

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of the fused silica ceramic revolving body comprises the following steps:

[0045] (1) Preparation of alcohol-based quartz slurry

[0046] Mix the fused silica powder with a median diameter of 30 μm and the fused silica powder with a median diameter of 10 μm, wherein the fused silica powder with a median diameter of 30 μm accounts for 30 wt%, then add alcohol and thermosetting resin to stir and mix for 4 hours, and let it stand for stale 36h, stirred again for 6h to obtain an alcohol-based quartz slurry, wherein the alcohol in the slurry accounts for 17.5wt%, and the phenolic resin accounts for 0.5wt%;

[0047] (2) Preparation of green body

[0048] The green body is prepared by high-pressure grouting method, and it is made after stripping;

[0049] The high-pressure grouting process is divided into two processes: low-pressure grouting and pressure-holding and alcohol removal in stages: first, grouting is carried out at 0.5MPa until the mold is ...

Embodiment 2

[0055] The preparation method of the fused silica ceramic revolving body comprises the following steps:

[0056] (1) Preparation of alcohol-based quartz slurry

[0057] Mix the fused silica powder with a median diameter of 20 μm and the fused silica powder with a median diameter of 5 μm, wherein the fused silica powder with a particle diameter of 15 μm accounts for 40 wt%, then add alcohol and thermosetting resin to stir and mix for 5 hours, and let it stand for 48 hours , stirred again for 8h to obtain an alcohol-based quartz slurry, wherein the alcohol in the slurry accounts for 16.5wt%, and the phenolic resin accounts for 5wt%;

[0058] (2) Preparation of green body

[0059] The green body is prepared by high-pressure grouting method, and it is made after stripping;

[0060]The high-pressure grouting process is divided into two processes: low-pressure grouting and pressure-holding and alcohol removal in stages: first, grouting is performed at 0.2MPa until the mold is full...

Embodiment 3

[0066] The preparation method of the fused silica ceramic revolving body comprises the following steps:

[0067] (1) Preparation of alcohol-based quartz slurry

[0068] Mix fused silica powder with a median diameter of 50 μm and fused silica powder with a median diameter of 15 μm, wherein the fused silica powder with a particle diameter of 50 μm accounts for 10 wt%, then add alcohol and thermosetting resin to stir and mix for 3 hours, and let it stand for 24 hours , stirred again for 4h to obtain an alcohol-based quartz slurry, wherein the alcohol in the slurry accounts for 20wt%, and the phenolic resin accounts for 0.1wt%;

[0069] (2) Preparation of green body

[0070] The green body is prepared by high-pressure grouting method, and it is made after stripping;

[0071] The high-pressure grouting process is divided into two processes: low-pressure grouting and pressure-holding and alcohol removal in stages: first, grouting is performed at 0.1MPa until the mold is full of gr...

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Abstract

The invention relates to a preparation method of a fused quartz ceramic revolving body, and belongs to the technical field of quartz ceramic material preparation. The preparation method is characterized in that fused quartz powder, alcohol and thermosetting resin are uniformly mixed; after still standing and aging, secondary uniform mixing is performed; alcohol-based quartz slurry is obtained; then, mold blank body formation is performed by a high-pressure slurry injection method; through demolding, drying, curing and sintering, the fused quartz ceramic revolving body is obtained. The preparation method has the advantages that fused quartz is used as major raw materials; the preparation process is very special, so that the content of the major ingredient, fused quartz, in a finished product is enabled to reach 99 percent or higher; the product has uniform compactness, high strength and excellent dielectric property. Compared with a slip casting and gel casting process, the high-pressure casting process has the advantages that the consistency of the quartz ceramic revolving body is greatly improved; the problems of long period of the slip casting process, great product density distribution differences and existence of shadow, pores and the like of a blank body of the gel casting process are well solved.

Description

technical field [0001] The invention relates to a preparation method of a fused quartz ceramic revolving body, belonging to the technical field of preparation of quartz ceramic materials. Background technique [0002] The fused silica ceramic revolving body has a dense and uniform structure, high strength, and excellent dielectric properties. Its main function is to protect the antenna from harsh factors such as gas and moisture in the application environment. [0003] The traditional molding methods of fused silica ceramic revolving body mainly include two methods: grouting molding and coagulation molding. Although both are relatively mature, there are still some shortcomings that are difficult to improve: the molding time required by the grouting molding method is long, and the products The density distribution is uneven; because organic substances need to be added to the injection molded products, it is easy to form shadow flow marks and pores after sintering. Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14B28B1/26C04B35/626
Inventor 孙成功曹俊倡陈秀峰邢政鹏栾强李勇程洪浩姜立平李红彬
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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