Preparation and Characterization of Porous Alumina Insulation Materials by Gel-Foaming

摘要

Porous alumina insulation materials were prepared by the combination method of gelcasting and foaming.The effects of the amount of blowing agent,the solid volume,and the sintering temperature on porosity of aluminum oxide ceramic were studied.The result showed that,when the amount of blowing agent is lwt ％,the solid volume is 45vol ％ and the sintering temperature is 1500℃,the porous alumina ceramics with high porosity,small pore diameters,evenly distributed,high bending strength and low heat conductance can prepared.