Combustion Synthesis of β-Si3N4 and β-SiAION with Elongated Prismatic Micro-Crystals by Adding SrCO3 and NH4F

摘要：

　　β-Si3N4 and β-SiAlON powders were prepared by combustion synthesis with SrCO3 and NH4F used as additives.The resultant β-Si3N4 and β-SiAlON powders consisted of elongated prismatic microcrystals.By adding SrCO3,the anisotropic growth of β-Si3N4 and β-SiAlON crystals is improved and their aspect ratios increase.The addition of NH4F enhanced nitridation reactions and reduced the residual Si in combustion products.It was proposed that the elongated prismatic β-Si3N4 and β-SiAlON crystals grew from liquid phase and the composition and property of this liquid was affected by the addition of SrCO3.

关键词： Combustion synthesis β-Si3N4 β-SiAlON Anisotropic crystal growth

作者: G.H.Liu K.X.Chen H.P.Zhou J.T.Li J.D.Zhong J.M.F.Ferreira

作者单位: Department of Materials Science and Engineering,State Key Laboratory of New Ceramics and Fine Proces Department of Materials Science and Engineering,State Key Laboratory of New Ceramics and Fine Proces Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,100101,Beijing,China Department of Ceramics and Glass Engineering,CICECO,University of Aveiro,3810-193,Aveiro,Portugal

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: 865-867

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）