熔盐法合成片状BaBi_4Ti_4O_(15)粉体  

BaBi_4Ti_4O_(15) FLAKE POWDER SYNTHESIZED BY MOLTEN SALT METHOD

作　　者：李丽华[1] 黄金亮[1] 张柯[1] 殷镖[1] 崔春伟[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《硅酸盐学报》2006年第9期1046-1049,共4页Journal of The Chinese Ceramic Society

基　　金：教育部留学归国人员基金(2003-14)资助项目;河南省国际科技合作计划(03446620012)资助项目

摘　　要：以NaCl-KCl为助熔剂,熔盐法合成了片状BaBi4Ti4O15粉体。采用X射线衍射分析粉体的相结构,用扫描电镜观察其微观形貌,研究了不同预烧温度及熔盐含量对粉体形貌及相结构的影响。结果表明;在850～1050℃范围,可生长出各向异性的片状BaBi4Ti4O15粉体;随着温度的升高,合成粉体的片状更趋明显,但生长各向异性程度减小;生长各向异性粉体的最佳预烧温度为850～950℃。当熔盐含量与反应物的质量比小于1时,晶粒尺寸随熔盐含量增加而增大;当熔盐含量继续增加时,粉体的晶粒尺寸反而减小。Flake powder of BaBi4Ti4O15was synthesized using NaCl-KCl as flux by the molten salt method. The phase and the microstructure of reaction products calcined at different temperatures were detected by X-ray diffraction and scanning electron microscopy. The effects of salt content and calcination temperature on the microstructure and morphology of BaBi4Ti4O15 powder were investigated. The results show that BaBi4Ti4O15 flake structure with anisotropy can be grown at 850-1 050℃, and BaBi4Ti4O15 calcined at higher temperature has a more distinct flake structure. But the level of anisotropy of BaBi4Ti4O15 powder decreases with the increase of calcination temperature. The optimum calcination temperature range of flake-like BaBi4Ti4O15 powder with anisotropy is 850-950℃. The BaBi4Ti4O15 flake particle size increases with the increase of the salt content when the mass ratio of the salt to reactant is less than 1. However, when the salt content continuous increases, the BaBi4Ti4O15 flake particle size decreases with the increase of the salt content.

关 键 词：钛酸铋钡粉体 片状结构 熔盐法 

分 类 号：TH145[一般工业技术—材料科学与工程]