Effect of Pore Size on Properties of Highly Porous Silica Ceramic Foams for Heat Insulation

作者：DU Zhongpei,YAO Dongxu,XIA Yongfeng,ZUO Kaihui,YIN Jinwei,LIANG Hanqin,ZENG Yuping

摘要：Highly porous silica ceramics with different pore sizes were fabricated by adjusting the mixed surfactants addition.The effect of the pore size on the cold compressive strength and the thermal conductivity of the ceramics was researched.The results show that the smaller pore size can improve the compressive strength and the thermal conductivity.With the mixed surfactants addition increasing from 0.1 mass%to 0.4 mass%,the porosity is close,in the range of 88.10%-88.31%,and the average pore size decreases from 190μm to 97μm;the compressive strength is enhanced from 2.97 MPa to 3.55 MPa;and the thermal conductivity decreases from 0.104 W·m-1·K-1 to 0.089 W·m-1·K-1.

发文机构：State Key Laboratory of High Performance Ceramics and Superfine Microstructure Center of Materials Science and Optoelectronics Engineering

关键词：mixedsurfactantsporesizehighporositysilicafoamsdirectfoamingthermalconductivity

分类号： TQ1[化学工程]