摘要
采用Ｓｏｌ－ｇｅｌ法制备了不同Ｔｉ／Ｂａ摩尔比的ＢａｙＴｉｘＯ３（ｘ／ｙ＝０．９９０，１．０００，１．０１０，１．０２０，１．０４５）纳米晶粉体。应用热分析、Ｘ射线粉末衍射、激光和透射电镜等技术对干凝胶热分解历程和粉体性能进行了研究，发现随Ｔｉ／Ｂａ摩尔比的增加，粉体的平均晶粒尺寸、晶体结构和粉体粒度分布各呈现规律性变化。
The
nanocrystalline powders of Ba yZTi x O3 with various Ti/Ba molar ratios (
x/y=0.990,1.000,1.010,1.020,1.045) were prepared by sol-gel method and characterized using
Xray powder diffraction,laser and transmission electron microscopy.The thermal decomposition
processes of Ba y Ti x O3 dry gels were investigated through thermal analysis techniques.The
studies revealed that with increasing Ti/Ba molar ration,the average crystallite size,the crystal
structure and the particle size distribution of Ba y Ti x O3 nanocrystalline powders exhibited
regular changes,respectively.In this paper,the above regularities of changes have been
discussed tentatively.
出处
《功能材料》
EI
CAS
CSCD
北大核心
1999年第2期179-181,共3页
Journal of Functional Materials
基金
陕西省教委重点科研项目基金
关键词
钛酸钡
纳米晶粉体
Ti/Ba摩尔比
SOL-GEL法
表征
nanocrystalline powder of barium titanate
Ti/Ba molar
ratio
average crystallite size
crystal structure
