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High-purity quartz ceramic with high density and no complex phase

A quartz ceramic, high-density technology, applied in the field of ceramic materials, can solve the problems of complex composition of quartz ceramics, poor high-temperature corrosion resistance of finished products, and difficulty in controlling the sintering reaction process, so as to reduce the influence of ceramics, simplify the molding process, and increase density. Effect

Active Publication Date: 2019-01-22
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a controllable reaction, no complex phase, high solid phase, high density and other deficiencies such as the complex composition of the existing quartz ceramics, which leads to the difficulty in controlling the sintering reaction process, and the poor high temperature corrosion resistance of the finished product. High purity quartz ceramics

Method used

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  • High-purity quartz ceramic with high density and no complex phase
  • High-purity quartz ceramic with high density and no complex phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation of high-density, non-complex-phase high-purity quartz ceramics specifically includes the following steps:

[0028] S1. Pre-invalidation: Prepare 88 parts of ammonium persulfate into an aqueous solution and then mix it with 9 parts of tetramethylethylenediamine to form a pre-invalidation mixed aqueous solution, and perform pre-invalidation at 28°C for 13 minutes;

[0029] S2. Preparation of premix: prepare 20 parts of N,N-dimethylacrylamide, 1 part of N,N'-methylenebisacrylamide and 100 parts of water in proportion, and then add 14 parts of pre-ineffective mixture Prepared as a premix.

[0030] S3. Quartz slurry preparation: Add 50 parts of high-purity fused silica powder with a purity of 99.9% to 20 parts of the premixed liquid, and stir evenly to obtain a suspension.

[0031] S4. Vacuuming: leave the suspension prepared in step S3 for 7 minutes, vacuumize, remove air bubbles, and obtain slurry;

[0032] S5. Microwave heating molding: inject the slurry...

Embodiment 2

[0036] The preparation of high-density, non-complex-phase high-purity quartz ceramics specifically includes the following steps:

[0037] S1. Pre-invalidation: Prepare 90 parts of ammonium persulfate into an aqueous solution and then mix it with 11 parts of tetramethylethylenediamine to form a pre-invalidation mixed aqueous solution, and perform pre-invalidation at 28°C for 13 minutes;

[0038] S2. Preparation of premix: 33 parts of N,N-dimethylacrylamide, 1.5 parts of N,N'-methylenebisacrylamide and 280 parts of water were prepared in proportion, and then 14.5 parts of pre-ineffective mixed solution were added Prepared as a premix.

[0039] S3. Preparation of quartz slurry: Add 68 parts of high-purity fused silica powder with a purity of 99.9% to 37 parts of premixed liquid, and stir evenly to obtain a suspension.

[0040] S4. Vacuuming: leave the suspension prepared in step S3 for 7 minutes, vacuumize, remove air bubbles, and obtain slurry;

[0041] S5. Microwave heating m...

Embodiment 3

[0045] The preparation of high-density, non-complex-phase high-purity quartz ceramics specifically includes the following steps:

[0046] S1. Pre-failure: Prepare 96 parts of potassium persulfate as an aqueous solution and then mix it with 12 parts of tetramethylethylenediamine to form a pre-failure mixed aqueous solution, and perform pre-failure at 28°C for 13 minutes;

[0047] S2. Preparation of premix: 40 parts of N,N-dimethylacrylamide, 3 parts of N,N'-methylenebisacrylamide and 400 parts of water are prepared in proportion, and then 15 parts of pre-ineffective mixed solution are added Prepared as a premix.

[0048] S3. Preparation of quartz slurry: Add 80 parts of high-purity fused silica powder with a purity of 99.9% to 50 parts of premixed liquid, and stir evenly to obtain a suspension.

[0049] S4. Vacuuming: leave the suspension prepared in step S3 for 7 minutes, vacuumize, remove air bubbles, and obtain slurry;

[0050] S5. Microwave heating molding: inject the slurr...

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Abstract

The invention discloses a high-purity quartz ceramic with controllable reaction, no complex phase and high density. The high-purity quartz ceramic comprises the following components in parts by weight: 50-80 parts of high-purity fused quartz powder and 20-50 parts of a premixed liquid; with 90 wt%-99.9 wt% of high-purity fused quartz powder as raw material, in-situ molding is performed with a water-based gel system, a catalyst (tetramethylethylenediamine) and an initiator are pre-invalid to obtain a pre-invalid mixed solution, and then a premixed liquid is prepared from a monomer, a crosslinking agent and the pre-invalid mixed solution in a certain proportion; the initiator ammonium persulfate (APS) is used as a dispersant, and fused quartz powder is added into the premixed liquid and stirred; after stirring, the mixture is placed in a vacuumizing instrument and is vacuumized, bubbles in the suspension are removed, and in-situ reaction molding is carried out after short time microwaveheating.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, more specifically, to a high-purity quartz ceramic with controllable reaction, no complex phase, high solid phase and high density. Background technique [0002] Due to its good physical and chemical properties, fused silica ceramics are widely used in the atomic industry and are the preferred material for polysilicon casting and smelting. Through the continuous improvement of ceramic molding technology, injection molding has become the preferred molding method for various ceramic materials. When fused silica ceramics are water-based injection molding, during the sintering process of the injection molding fused silica ceramic material, due to the organic The combustion loss of organic matter such as monomers and the difficulty in controlling the reaction time due to the fast molding reaction speed make it difficult to remove a large number of air bubbles in the slurry, and there is almo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/626C04B35/638
CPCC04B35/14C04B35/622C04B35/62605C04B35/638C04B2235/6562C04B2235/6567C04B2235/661C04B2235/77C04B2235/96
Inventor 侯清麟王迎霞田靓
Owner HUNAN UNIV OF TECH