Porous mullite ceramic materials and method for preparing same

Abstract

The invention discloses a porous mullite ceramic material and preparing method, which comprises the following steps: dispensing 10-50 percent coal gangue powder, 50-90 percent Al (OH) 3, 2-10 percent water and 0-10 percent addictive; stirring; moulding; drying the mould at 110 deg.c for 4-24 h; sintering at 1400-1600 deg.c for 1-8 h. The chemical component of product is SiO2 and Al2O3, wherein the main crystal phase is mullite or mullite-alumina, which can be high-strength and light-quality insulating flame-proof material.

Description

1. Technical field

[0001] The invention belongs to the field of porous ceramic materials. In particular, it relates to a light-weight thermal insulation refractory material with mullite and corundum as main phase components and a preparation method thereof. 2. Background technology

[0002] Most of the current insulation materials are Al 2 o 3 -SiO 2 Department of materials (Wang Weibang. Refractory Technology. Metallurgical Industry Press, 2003), the main phases are corundum, mullite, quartz phase and glass phase. The pore size of these insulation materials is relatively large, and the pore distribution is uneven. From the perspective of pore-making technology, there are currently two main methods for preparing porous ceramic materials and lightweight thermal insulation refractory materials:

[0003] 1. Add combustibles

[0004] Add combustibles into ceramic or refractory powder, such as sawdust, coal powder, coke powder, expanded polystyrene balls, etc. After molding...