无机材料学报

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Sr0.4Ba0.6Nb2O6物相形成过程的XRD分析

黄清伟1; 王佩玲2; 严东生1; 程一兵2   

  1. 1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050; 2. 澳大利亚Monash大学材料工程系, 墨尔本 3168
  • 收稿日期:2001-07-19 修回日期:2001-09-18 出版日期:2002-07-20 网络出版日期:2002-07-20

XRD Analysis for the Formation of Sr0.4Ba0.6Nb2O6 Phase

HUANG Qing-Wei1; WANG Pei-Ling1; CHENG Yi-Bing2; YAN Dong-Sheng1   

  1. 1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China; 2. Department of Materials Engineering, Monash University, Victoria, 3168, Australia
  • Received:2001-07-19 Revised:2001-09-18 Published:2002-07-20 Online:2002-07-20

摘要: 采用X射线衍射技术(Guinier-Hagg相机)分析了Sr0.4Ba0.6Nb2O6(SBN40)原始混合粉料经不同温度煅烧后的相组成,并利用PIRUM程序对不同反应温度下形成铌酸锶钡相的晶胞尺寸进行了计算.结果表明:在Sr0.4Ba0.6Nb2O6的形成过程中将出现中间相Na5Nb4O15、Sr5Nb4O15、SrNb2O6与BaNb2O6,而SrNb2O6与BaNb2O6最终反应生成铌酸锶钡.反应生成的铌酸锶钡的晶胞参数随反应温度的升高而变小.依据这些实验结果,文中提出了Sr0.4Ba0.6Nb2O6相的形成机制.

关键词: 铌酸锶钡, XRD, 形成机制

Abstract: The phase assembles of Sr0.4Ba0.6Nb2O6 (SBN40) starting powder mixture calcined
at different temperatures were identified by X-ray Guinier-Hagg camera film data and the unit cell dimensions of strontium barium niobate
(SBN) developed at different temperatures were calculated by using PIRUM program. It was found that four intermediate phases, i.e.,
Na5Nb4O15, Sr5Nb4O15, SrNb2O6 and BaNb2O6 were developed during the formation of Sr0.4Ba0.6Nb2O6 and the two latter phases reacted to form SBN. The unit cell dimensions of SBN decreased with increasing sintering temperature. On the basis of results,
the corresponding formation mechanism of Sr0.4Ba0.6Nb2O6 phase was also suggested.

Key words: formation mechanism, strontium barium niobate, XRD

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