Preparation and Properties of Porous Si3N4/SiO2/BN Composite Ceramics

摘要：

　　Porous Si3N4/SiO2/BN composite ceramics with high strength and low dielectric constant were prepared by dry-pressing process and pressureless sintering at 1750℃ for 1.5 h in flow nitrogen.The influences of BN content on microstructure,porosity,mechanical and dielectric properties of the porous Si3N4/SiO2/BN composite ceramics were discussed.The results showed that the porous Si3N4/SiO2/BN composite ceramics with porosity ranging from 29% to 48% were fabricated by adjusting the content of BN.The flexural strength of the porous Si3N4/SiO2/BN composite ceramics was 78~215 MPa.The dielectric constant of the porous Si3N4/SiO2/BN composite ceramics was 3.9~5 at 1 MHz.

关键词： Si3N4/SiO2/BN Porous ceramic Dielectric properties Flexural strength

作者: Wei Dong Chang-An Wang Lei Yu Shi-Xi Ouyang

作者单位: China Building Materials Academy,Beijing 100024,China;State Key Lab of New Ceramics and Fine Process State Key Lab of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Ts State Key Lab of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Ts China Building Materials Academy,Beijing 100024,China

会议类型: 国际会议

会议名称: The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))

会议地点: 厦门

会议语种:英文

页码: 828-831

在线出版日期: 2011-11-04（万方平台首次上网日期，不代表论文的发表时间）