Effects of Microstructure and Relative Density on the Dielectric Constant of Porous Silica

摘要：

　　This work studies the effects ofmicrostructure and relative density on the dielectric constant of porous silica prepared by two different techniques:gelcasting of suspension (GCS) and gelcasting of foams (GCF).Both routes are carried out from the preparation of silica suspension containing starch granules.In GCS route,the resultant suspensions were heated for consolidation,while in GCF route,the suspension was foamed before consolidation.The results indicated that the dielectric constant of porous silica was obviously determined by relative density,but scarcely influenced by microstructure.The logarithmic fitting equation lnε =p·lnεs was a good model to describe the relationship between the dielectric constant and the relative density of porous silica prepared by both GCS and GCF routes.

关键词： Microstructure Relative density SiO2 Dielectric constant

作者: Xiaojian Mao Shiwei Wang Shunzo Shimai

作者单位: Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Graduate School of Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 339-341

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）