A kind of preparation method of anorthite-quartz-glass phase composite ceramics

A technology of composite phase ceramics and glass phase, applied in the field of composite ceramics, can solve the unavoidable problems of high thermal expansion coefficient and low strength, high thermal expansion coefficient, sintering cracking of green body, etc., and achieve rich raw materials, high thermal expansion coefficient and low strength Effect

Active Publication Date: 2022-05-17
INNER MONGOLIA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the above-mentioned composite ceramic materials avoid the disadvantages of single-phase anorthite ceramics and single-phase quartz ceramics in terms of sintering performance, physical properties and mechanical properties, such as high sintering temperature, low density, sintering cracking of the green body, and high thermal expansion coefficient and low strength, etc., but the research is more on feldspar-mullite composite ceramics, quartz phase-anorthite composite ceramics, etc., which still cannot avoid the problems of high thermal expansion coefficient and low strength

Method used

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  • A kind of preparation method of anorthite-quartz-glass phase composite ceramics
  • A kind of preparation method of anorthite-quartz-glass phase composite ceramics
  • A kind of preparation method of anorthite-quartz-glass phase composite ceramics

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Embodiment 1

[0033] The mass ratio of desert sand, fly ash, kaolin and cellulose is 8:2:0.5:1. Mix desert sand, fly ash, kaolin and cellulose and ball mill in water. The amount of water used is 50% of the total mass of raw materials. %; the time of ball milling is 3 hours, the speed of ball milling is 40 rpm, the particle size of powder after ball milling is 5-10 μm, the particle size of granulation is 1-2mm, molding under 20MPa pressure, sintering at 1100 ° C for 2 hours, The apparent porosity of the ceramic is 6.8%, the bending strength is 70MPa, and the thermal expansion coefficient is 7.2×10 -6 / °C.

Embodiment 2

[0035] The mass ratio of desert sand, fly ash, kaolin and cellulose is 7:3:1:1.5. Mix desert sand, fly ash, kaolin and cellulose and ball mill in water. The amount of water is 50% of the total mass of raw materials. %; the time of ball milling is 2 hours, the speed of ball milling is 40 rpm, the particle size of the powder after ball milling is 5-10 μm, the particle size of granulation is 1-2mm, molding under 30MPa pressure, sintering at 1150 ° C for 4 hours, The apparent porosity of the ceramic is 4.9%, the bending strength is 97MPa, and the thermal expansion coefficient is 6.6×10 -6 / °C.

Embodiment 3

[0037]The mass ratio of desert sand, fly ash, kaolin and cellulose is 6:4:2:1. After mixing desert sand, fly ash, kaolin and cellulose, they are ball milled in water. The amount of water is 50% of the total mass of raw materials. %; the time of ball milling is 2.5 hours, the speed of ball milling is 40 rpm, the particle size of the powder after ball milling is 5-10 μm, the particle size of granulation is 1-2mm, molding under 50MPa pressure, and sintering at 1250 ° C for 3 hours, The apparent porosity of the ceramic is 0.5%, the bending strength is 110MPa, and the thermal expansion coefficient is 6.2×10 -6 / °C.

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Abstract

The invention discloses a preparation method of anorthite-quartz-glass phase composite ceramics. The raw materials of the composite ceramics are composed of desert sand, fly ash, kaolin and cellulose. The composite ceramic material of anorthite-quartz-glass phase prepared by the present invention has an apparent porosity of 0.5-7%, a bending strength of 70-130MPa, and a coefficient of thermal expansion of (3.0-7.4)×10 ‑6 / °C, it can be used to make conveying pipelines, silo linings, heat insulation boards, kiln materials, etc. in machinery, chemical, metallurgy, environmental protection and other industries, and can also be used for urban and rural road paving, building decoration, etc.

Description

technical field [0001] The invention relates to the technical field of multiphase ceramics. Specifically, it is a preparation method of anorthite-quartz-glass phase composite ceramics. Background technique [0002] The production of oxide ceramics mainly relies on mineral raw materials such as quartz, alumina, magnesia, kaolin, montmorillonite, feldspar and limestone. Increased use of ceramics requires the extraction of large mineral resources. Natural deserts occupy a large amount of land resources. Since desert aeolian sand mainly contains silicon oxide components, it also contains a certain amount of components such as alumina, calcium oxide, sodium oxide, and iron oxide. Applying aeolian sand to ceramic production can save Minerals, land resources and make full use of idle desert resources. It has been reported that by using aeolian sand as raw material and other auxiliary raw materials, through batching, ball milling, compacting and sintering, ceramics with quartz, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00
CPCC03C10/0063Y02P40/60
Inventor 史志铭韩超闫华王文彬
Owner INNER MONGOLIA UNIV OF TECH
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