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Porous forsterite and akermanite composite ceramic material and preparation method thereof

A technology of magnesia feldspar and composite ceramics, applied in the field of porous ceramic materials, can solve problems such as complex production process, environmental pollution, and shortage of raw materials, and achieve good high-temperature performance, avoid secondary pollution, and controllable pore size

Inactive Publication Date: 2014-11-12
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heat insulation refractory materials are mostly made of light, porous aluminum silicate, mullite and corundum heat insulation materials. These materials are mostly made by chemical methods, adding combustibles, foaming or vacuum blowing. On the one hand, these production processes are relatively complicated, and the waste generated by the combustion of combustibles in the production process will cause environmental pollution; on the other hand, the raw materials of these materials are increasingly scarce, which restricts their use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A porous forsterite-magnesite composite ceramic material and a preparation method thereof. Take 60-65wt% dolomite powder, 25-27wt% silica powder and 10-15wt% magnesite powder as raw materials, mix, add 5-8wt% pulp waste liquid of the raw material, stir evenly, and mechanically press molding Then, the formed green body is dried at 110°C for 16 to 24 hours, and then kept at 1250 to 1400°C for 3 to 5 hours to obtain the porous forsterite-magnesium feldspar composite ceramic material.

[0014] Among them: the pressure of mechanical pressing is 30~80MPa; the particle size of silica powder is less than 44μm.

[0015] The porous forsterite-forsterite composite ceramic material prepared in this example: the main phases are forsterite and forsterite with uniform distribution; the apparent porosity is 44-55%; the bulk density is 1.58-1.80 g / cm 3 ; The compressive strength at room temperature is 25~45MPa.

Embodiment 2

[0017] A porous forsterite-magnesite composite ceramic material and a preparation method thereof. Take 65-70wt% dolomite powder, 25-28wt% silica powder and 5-10wt% magnesite powder as raw materials, mix, add 5-8wt% pulp waste liquid of the raw material, stir evenly, and mechanically press molding Then, the formed body is dried at 110°C for 16-24 hours, and then kept at 1300-1450°C for 4-8 hours to obtain the porous forsterite-magnesium feldspar composite ceramic material.

[0018] Among them: the pressure of mechanical pressing is 50~100MPa; the particle size of silica powder is less than 88μm.

[0019] The porous forsterite-magnesium feldspar composite ceramic material prepared in this example: the main phases are forsterite and magnesia feldspar with uniform distribution; the apparent porosity is 35-45%; the bulk density is 1.66-2.06 g / cm 3 ; The compressive strength at room temperature is 40~70MPa.

[0020]

[0021] This specific embodiment utilizes the self-deco...

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Abstract

The invention relates to a porous forsterite and akermanite composite ceramic material and a preparation method of the porous forsterite and akermanite composite ceramic material. According to the technical scheme, 60-70 wt% of dolomite powder, 25-28 wt% of silica powder and 5-15 wt% of magnesite powder serve as raw materials and are mixed, pulp liquid waste 5-8 wt% of the raw materials is added, and the mixture is stirred to be even and is mechanically pressed and formed; then a formed green body is aired for 16-24 hours under the condition of 110 DEG C, the temperature is kept for 3-8 hours under the condition of 1300-1450 DEG C, and then the porous forsterite and akermanite composite ceramic material is obtained. The particle sizes of the dolomite powder, the silica powder and the magnesite powder are smaller than 88 micrometers, and the pressure of mechanical pressing and forming is 30-100 MPa. The porous forsterite and akermanite composite ceramic material has the advantages of being environmentally friendly, being composed of dual phases, and being controllable in phase composition, pore size and size. The prepared porous forsterite and akermanite composite ceramic material is high in apparent porosity, high in intensity and good in high temperature performance, and can be used in the working environment lower than 1400 DEG C as a heat preservation material.

Description

technical field [0001] The invention belongs to the technical field of porous ceramic materials. In particular, it relates to a porous forsterite-magnesite composite ceramic material and a preparation method thereof. Background technique [0002] Insulation refractory material is the main lining material of high temperature industrial kiln, its production cost and performance restrict the development of high temperature industry. Heat insulation refractory materials are mostly made of light, porous aluminum silicate, mullite and corundum heat insulation materials, which are mostly made by chemical methods, adding combustibles, foaming or vacuum blowing. On the one hand, these production processes are relatively complicated, and the waste generated by the combustion of combustible materials in the production process will cause environmental pollution; on the other hand, the raw materials of these materials are increasingly scarce, which restricts their use. Therefore, it is...

Claims

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Application Information

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IPC IPC(8): C04B35/04C04B35/622
Inventor 鄢文林小丽陈俊峰李楠
Owner WUHAN UNIV OF SCI & TECH
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