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Cordierite nucleated glass prepared by using flyash and its preparation method

A technology of glass-ceramics and fly ash, applied in the field of ceramic materials

Inactive Publication Date: 2003-12-10
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the cordierite glass-ceramic prepared by using fly ash and the preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A cordierite glass-ceramic prepared from fly ash. When it is used to prepare kiln furniture, its formula is 61-66wt% of fly ash, 6-11wt% of aluminum oxide powder, 20-25wt% of basic magnesium carbonate (also known as magnesium carbonate) powder, methyl cellulose 3 -5wt%, water 3-6wt%. If it is used to prepare honeycomb products, its formula is 48-52wt% of fly ash, 5-9wt% of aluminum oxide powder, 15-20wt% of basic magnesium carbonate powder, 5-9wt% of methylcellulose, sodium stearate 1wt%, water 18-25wt%.

[0021] Preparation:

[0022] 1. Prepare kiln furniture. 1), ingredients: 61-66wt%, aluminum oxide powder 6-11wt%, basic magnesium carbonate (also known as magnesium carbonate) powder 20-25wt%, methylcellulose 3-5wt%, water 3-6wt%. ; Fully and evenly mix the above ingredients;

[0023] 2), manufacturing the green body: press molding with a press to make the green body;

[0024] 3), dry green body;

[0025] 4) High-temperature crystallization: the dried green bod...

Embodiment 2

[0030] Example 2: A cordierite glass-ceramic prepared with fly ash. When it is used to prepare kiln furniture, its formula is fly ash 59-64wt%, alumina powder 8-12wt%, magnesite (MgCO 3 ) powder 20-24wt%, methylcellulose 3wt%, water 5wt%. If it is used to prepare honeycomb products, its formula is 45-49wt% of fly ash, 6-10wt% of alumina powder, magnesite (MgCO 3 ) powder 15-19wt%, methylcellulose 4-8wt%, sodium stearate 1wt%, water 20-25wt%.

[0031] Its preparation method is basically the same as Example 1.

Embodiment 3

[0032] Example 3: A cordierite glass-ceramic prepared with fly ash. When it is used to prepare kiln furniture, its formula is 62-67wt% of fly ash, 9-13wt% of aluminum oxide powder, 15-19wt% of feldspar powder, 3wt% of methylcellulose, and 5wt% of water. If it is used to prepare honeycomb products, its formula is 50-55wt% of fly ash, 6-10wt% of aluminum oxide powder, 14-19wt% of magnesium hydroxide powder, 4-8wt% of methylcellulose, sodium stearate 1wt%, water 20-25wt%.

[0033] Its preparation method is basically the same as Example 1.

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Abstract

The present invention relates to an iolite pyroceram prepared by using flyash as main raw material and its preparation method. Its composition includes (wt%) 45-77% of flyash, 5-15% of alumina powder of bauxite, 10-25% of basic magnesium carbonate or magnesite or brucite or magnesium oxide powder, 3-10% of methyl cellulose and 3-30% of water.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a glass-ceramic prepared from fly ash and a preparation method thereof. Background technique [0002] The phase composition in general fly ash is mainly glass microspheres, quartz and mullite, wherein the content of glass microspheres is greater than 60wt%; the content of glass phase in fly ash less than 300 mesh accounts for 90wt% of this part of fly ash %. The crystalline bulk material transformed from glass is called glass-ceramic. At present, there is no report on cordierite glass-ceramics prepared with fly ash and its preparation method. Contents of the invention [0003] The object of the present invention is to provide a kind of cordierite glass-ceramic prepared with fly ash and preparation method, and this material has very low coefficient of linear thermal expansion [1.46.10 -6 / °C (20-1000°C)], suitable for high-temperature engineering materials, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/00
CPCC03C10/0063
Inventor 何涌
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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