Preparing method of homogeneity fused quartz ceramic

A technology of fused silica and fused silica powder, applied in the field of preparation of homogeneous fused silica ceramics, can solve the problems of low efficiency, poor material reliability, low strength, etc. Effect

Inactive Publication Date: 2017-01-11
FOSHAN GAOMING DISTRICT MINGCHENG TOWN NEW ENERGYNEW MATERIAL IND TECH INNOVATION CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods generally have the disadvantages of uneven microstructure, poor material reliability, low product density, and low strength, and are inefficient and difficult to adapt to the needs of mass industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Preparation of fused silica molding slurry

[0035] The raw material used in the examples is fused silica powder with a purity greater than 99.99wt%.

[0036]The high-purity fused silica powder is mixed according to the following particle size distribution and mass percentage: 8-15μm, 4wt%; 15-45μm, 8wt%; 45-58μm, 16wt%; 58-114μm, 35wt%; 114-160μm , 22 wt %; 160-175 μm, 15 wt %; the above-mentioned high-purity fused silica powder is added to deionized water and the mass of the powder is 0.35% polyvinyl alcohol, 0.58% lactic acid, 0.18% sodium bicarbonate to make Slurry with a solids content of 80 vol%.

[0037] The 40wt% acrylamide aqueous solution and N,N-methylenebisacrylamide were mixed in a mass ratio of 30:1, and stirred and dissolved to obtain a premixed solution.

[0038] The slurry, alumina powder, and premix prepared above were mixed at a mass ratio of 48:1:8, dispersed at 900 r / min for 60 min, and then added with ammonium persulfate accounting for 4% of t...

Embodiment 2

[0043] In this example, the process conditions and raw materials are the same as those in Example 1. The difference is that Si, which accounts for 0.80% by mass, is added to the fused silica powder. 3 N 4 powder, and Si 3 N 4 The particle size of the powder is 50 μm.

Embodiment 3

[0045] In this example, the process conditions and raw materials are the same as those in Example 1. The difference lies in that: 0.65% by mass of silica aerogel micropowder is added to the fused silica powder. The specific surface area is 480m 2 / g, density is 68kg / m 3 .

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PUM

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Abstract

The invention discloses a preparing method of homogeneity fused quartz ceramic. The preparing method comprises the step A, mixing high purity fused quartz powder; adding quartz powder material into deionized water as well as polyvinyl alcohol, lactic acid and sodium sesquicarbonate to make slurry; B, conducting mixing of 40wt% acrylamide aqueous solution with N,N'-Methylenebisacrylamide N,N'-Methylenebis (2-propenamide) to obtain premixed liquid; C, conducting mixing of the slurry in the step A, sintering aid and the premixed liquid in the step B, and adding initiator to obtain formed slurry after dispersion; D, pouring the formed slurry in the step C into a mold of a dynamic gel casting device, conducting solidification after vibration, and opening the mold after cooling, so that the green ceramic required is obtained; E, firing the green ware body in the step D in a high temperature wave until being molded, so that the fused quartz ceramic required is prepared.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a preparation method of homogeneous fused silica ceramics. Background technique [0002] Quartz ceramics refer to products made of quartz glass or fused quartz as raw materials, only broken, shaped, fired and other ceramic manufacturing processes, also known as fused quartz ceramics, quartz glass ceramics. Due to a series of excellent properties such as excellent thermal shock stability, low thermal conductivity and low thermal expansion coefficient, fused silica ceramics have been more and more widely used in metallurgy, glass, chemical industry, aerospace and other fields. Fused silica ceramics mainly have the following advantages: [0003] 1) The coefficient of thermal expansion is small. The coefficient of thermal expansion (at room temperature) of pure fused silica ceramics is only 0.54×10 -6 / °C, has the same thermal expansion coefficient as quartz glass, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/634C04B35/632C04B35/63
CPCC04B35/14C04B35/622C04B35/6303C04B35/632C04B35/63416C04B2235/3873C04B2235/48C04B2235/5436C04B2235/5445C04B2235/6023C04B2235/6562C04B2235/6567C04B2235/661C04B2235/96
Inventor 麦浩
Owner FOSHAN GAOMING DISTRICT MINGCHENG TOWN NEW ENERGYNEW MATERIAL IND TECH INNOVATION CENT
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