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.
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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期841-844,共4页
Journal of Inorganic Materials
基金
国家自然科学基金项目(50072039)
中国科学院海外杰出学者基金
