摘要
以Ｂａ（ＯＨ）２·８Ｈ２Ｏ 和ＴｉＯ２ 为前驱物，在水热条件下制得了单一物相的ＢａＴｉＯ３ 粉体． 发现产物的物相与反应温度和前驱物的Ｂａ，Ｔｉ 摩尔比有关． 由负离子配位多面体生长基元模型分析了ＢａＴｉＯ３ 粉体的形成机理． 指出了形成ＢａＴｉＯ３ 粉体的生长基元为Ｂａ（ＯＨ）１０－１２ 和Ｔｉ（ＯＨ）２－６ ． 由此比较合理地解释了粉体的物相以及Ｂａ，Ｔｉ 摩尔比对ＢａＴｉＯ３ 粉体形成的影响．
The pure BaTiO 3 powder was prepared using Ba(OH) 2·8H 2O and TiO 2 as precursor under hydrothermal condition. It is found that the phase of obtained product is related to the reaction temperature and the molar ratio of Ba 2+ and Ti 4+ . The formation mechanism of BaTiO 3 powder is studied by growth unit model of anion ion coordinated polyhedra. It is pointed out that the growth units of BaTiO 3 crystal are Ba(OH) 10- 12 and Ti(OH) 2- 6. Moreover, the effect of the reaction temperature or the molar ratio of Ba 2+ and Ti 4+ on phase is explained reasonably.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1999年第6期714-720,共7页
Journal of The Chinese Ceramic Society
