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Porous periclase-forsterite-spinel composite ceramic material and preparation method thereof

A technology for forsterite and composite ceramics, which is applied in the field of composite ceramic materials, can solve the problems of less multiphase heat insulating refractories, low service temperature, etc., and achieves the effects of being conducive to environmental protection, good high temperature performance, and controllable pore diameter

Inactive Publication Date: 2014-10-08
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are few studies on multi-phase heat-insulating refractory materials, such as literature technology (Li Qiwei et al., Research on the composition, structure and performance of alkaline heat-insulating refractory materials, Silicate Bulletin, 2014, No. 7) based on Al 2 o 3 with SiO 2 Porous periclase-forsterite-spinel ceramic materials are prepared from magnesite powder and clay with higher content, but its use temperature is low, and it can only be used in working environments below 1300 °C

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A porous periclase-forsterite-spinel composite ceramic material and a preparation method thereof. With 28~32wt% magnesite powder, 5~8wt% clay powder and 63~67wt% Al(OH) 3 Powder as raw material, mix, add 6~9wt% water of the raw material, stir evenly, and mechanically press to shape; then dry the molded body at 110°C for 16~24 hours, then at 1400~1600°C Heat preservation for 3 to 5 hours to obtain porous periclase-forsterite-spinel composite ceramic material.

[0015] Among them: the pressure of mechanical pressing is 20-50MPa.

[0016] The porous periclase-forsterite-spinel composite ceramic material prepared in this embodiment: the main phases are periclase, forsterite and spinel uniformly distributed; the apparent porosity is 51-63%; normal temperature Compressive strength is 4~16MPa; bulk density is 1.35~1.52g / cm 3 .

Embodiment 2

[0018] A porous periclase-forsterite-spinel composite ceramic material and a preparation method thereof. With 32~45wt% magnesite powder, 5~8wt% clay powder and 50~63wt% Al(OH) 3 Powder as raw material, mix, add 5~9wt% water of the raw material, stir evenly, and mechanically press to shape; then dry the molded body at 110℃ for 16~24 hours, then at 1400~1600℃ After 3 to 5 hours of heat preservation, a porous periclase-forsterite-spinel composite ceramic material is obtained.

[0019] Among them: the pressure of mechanical pressing is 30~60MPa.

[0020] The porous periclase-forsterite-spinel composite ceramic material prepared in this example: the main phases are periclase, forsterite and spinel uniformly distributed; the apparent porosity is 48-59%; volume The density is 1.40~1.60g / cm 3 ; Compressive strength at room temperature is 8-20MPa.

Embodiment 3

[0022] A porous periclase-forsterite-spinel composite ceramic material and a preparation method thereof. With 45-50wt% magnesite powder, 5-8wt% clay powder and 45-50wt% Al(OH) 3 Powder as raw material, mix, add 5~9wt% water of the raw material, stir evenly, and mechanically press to shape; then dry the molded body at 110℃ for 16~24 hours, then at 1400~1600℃ Heat preservation for 3 to 6 hours to obtain porous periclase-forsterite-spinel composite ceramic material.

[0023] Among them: the pressure of mechanical pressing is 40~80MPa.

[0024] The porous periclase-forsterite-spinel composite ceramic material prepared in this embodiment: the main phases are periclase, forsterite and spinel uniformly distributed; the apparent porosity is 42-52%; volume The density is 1.55~1.72g / cm 3 ; Compressive strength at room temperature is 10~24MPa.

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Abstract

The invention relates to a porous periclase-forsterite-spinel composite ceramic material and a preparation method thereof. The technical scheme is as follows: the method comprises the following steps: mixing the raw materials of 28-90wt% of magnesite powder, 5-20wt% of clay powder and 5-67wt% of Al(OH)3 powder; adding water which is 5-15wt% of the raw materials, evenly stirring and molding the raw materials, and then drying the molded green body under the condition at 110 DEG C for 16-48 hours; carrying out heat preservation under the condition at 1300-1600 DEG C for 3-10 hours, so as to obtain the porous periclase-forsterite-spinel composite ceramic material, wherein the particle sizes of the magnesite powder, the Al(OH)3 powder and the clay powder are smaller than 88mum; molding is molding in a mechanical pressing manner, or molding in a manual ramming manner, or molding in a pouring manner. The porous periclase-forsterite-spinel composite ceramic material has the characteristics of being environment-friendly, controllable in phase composition, controllable in pore size, and controllable in volume; the prepared porous periclase-forsterite-spinel composite ceramic material has high apparent porosity, high strength and good high-temperature performance.

Description

technical field [0001] The invention belongs to the technical field of composite ceramic materials. In particular, it relates to a porous periclase-forsterite-spinel composite ceramic material and a preparation method thereof. Background technique [0002] As insulation materials for high-temperature kilns, heat-insulating refractory materials are of great significance to energy saving and consumption reduction in high-temperature industries, which makes the development of heat-insulating refractory materials more and more concerned. At present, the widely used thermal insulation refractory materials include diatomite refractory materials, anorthite refractory materials, clay thermal insulation refractory materials, mullite thermal insulation refractory materials, high alumina thermal insulation refractory materials, periclase - Forsterite heat insulation refractory materials, etc. The crystal phase composition of these insulating refractory materials is generally single p...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/66
Inventor 鄢文李楠李启伟林小丽陈俊峰
Owner WUHAN UNIV OF SCI & TECH
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