Pressureless Sintering of Silicon Nitride Porous Ceramics with High Porosity and Bimodal Pore Structure

摘要：

　　In this paper,silicon nitride porous ceramics with high porosity and bimodal pore structure were prepared using pressureless sintering at 900~1100℃.In these porous ceramics,zirconium phosphate (ZrP2O7) was used as a binder,starch and naphthalene powders were used as pore forming agents.The obtained results showed that the porosity could be controlled in the range of 34~70 % by changing the content of pore forming agents.The pores were formed by the continuous reaction of ZrP2O7 at ~250 ℃ and burnout of starch at ~550 ℃ (when starch was used as a pore forming agent),or sublimation of naphthalene at 80℃ (when naphthalene was used as a pore forming agent).The bimodal pore structure was produced with pore size of less than 0.5μm and ~10 μm when using starch as a pore forming agent and the pore size of less than 0.5μm and ~30μm when using naphthalene as a pore forming agent.

关键词： Si3N4 porous ceramics high porosity bimodal pore structure pressureless sintering

作者: Fei Chen Qiang Shen Lianmeng Zhang

作者单位: Key Laboratory of Advanced Technology for Specially Functional Materials,Ministry of Education,Wuhan State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Tech

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: 873-877

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）