Effects of Sintering Additives on Properties of Porous Silicon Nitride Ceramics Fabricated by Carbothermal Reduction

摘要：

　　In this paper,porous Si3N4 ceramics were fabricated by carbothermal reduction between silicon dioxide and carbon.The influences of four types of sintering additives on the microstructure and mechanical properties of the porous Si3N4 ceramics were investigated.XRD analysis proved complete formation of a single-phase β-Si3N4.SEM analysis showed that the resultant porous Si3N4 ceramics occupied fine microstructure and a uniform pore structure.The sintered sample with Lu2O3 as sintering additive showed finer,a higher aspect ratio β-Si3N4 grains.The addition of Eu2O3 accelerated the densification of porous Si3N4 ceramics,decreased the porosity and increased the flexural strength.

关键词： Porous Silicon Nitride carbothermal reduction sintering additives

作者: Yuan Lu Jian-Feng Yang Shao-Yun Shan Ji-Qiang Gao Zhi-Hao Jin

作者单位: State key laboratory for mechanical behavior of materials,Xian 710049,P.R.C

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: 878-880

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）