Phase Separation and Nanocrystal TiO2 Formation in Na2O-B2O3-SiO2-TiO2 System

摘要：

　　The basic compositions of the samples were selected inside and outside of Na2O-B2O3-SiO2 glass phase separation region,respectively.Nanocrystalline TiO2 was crystallized by melt-phase separation process.The results showed that the phase separation of Na2O-B2O3-SiO2-TiO2 glass system was advantaged to TiO2 nucleation and growth,and then the formation of the nanocrystalline.The main mechanism of TiO2 crystallization is that the rich alkali-boron phase has the lower viscidity and higher particles moving ability than that of parent phase glass.Therefore,the movement rate of TiO2 particle can be promoted and TiO2 crystallization can be accelerated.Moreover,the formation of non-homogeneous nucleus situation and the centralization function of TiO2 have less contribution to TiO2 crystallization.

关键词： Phase separation TiO2 crystallization

作者: Zhang Wenli Zhao Yingna Jin Jianguo

作者单位: College of Materials Science and Engineering,Hebei Polytechnic University,Tangshan 063009,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: 1419-1421

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）