In the systems of pnn - pt , the content of perovskite phase increased rapidly from 800 c to 850 c . the formation of perovskite phase for pnn - pt was more effective than that of pmn - pt system prepared by scm 。 ；最后再转化为钙钛矿结构的pfw 。在scm法中， pfw和州n干t的反应机理的区别是，前者形成的中间相为pbfewo 。
For two hours show almost pure perovskite phase . the ceramic pellets have straw yellow luster at the edge of the ceramic pellets . the mechanic intensity of the ceramic pellets is rather high 经xrd测量，发现经过1100 2h处理的片子几乎为全钙钛矿相，而且机械强度高、陶瓷片边缘有淡黄色光泽、机械强度较高。
Since 1995 , millis et al . have made a lot of wok , respectively , in order to interpret a lot to experimental facts , of which the research about lattice effect is of great importance 九十年代， millis等人对庞磁电阻效应的机理作了重要的探索，有关晶格效应的研究对钙钛矿庞磁电阻的理论研究有着非常重要的意义。
It is found that both the formation of the perovskite and contents of the crystalline phase in this pst thin film are dependent on the preparation processing and activity of an atom moved for nucleation and crystallization 证实了利用溶胶凝胶法制备pst薄膜的钙钛矿晶相形成过程及晶相含量受制备过程及晶相形成时离子的活性所控制。
Because of the expedient modulation of curie temperature tc to room temperature , the larger dielectric - temperature coefficients , pst materials are favorable to be used in microwave tunable devices 其还是一种互溶性较好的钙钛矿铁电材料，其居里点温度t _ c可较容易地调至室温附近，介电温度系数较大，是一种非常适用于电场调节元件的材料。
In the process of sputtering , the parameter of sputtering plays a crucial role in the texture of plct film , the experiments show that lower sputtering pressure and longer sputtering time is propitious to form “ perovskite ” 实验证明,在pbtio _ 3中掺入过多la不利于薄膜钙钛矿结构的形成;而较低的溅射气压和较长的溅射时间有利于plct薄膜纯钙钛矿相的形成。
The precursor method could solve the problem that the appearance of pyrochlore phase during the synthesis procedure by avoiding the direct reaction between pbo and nb _ ( 2 ) o _ ( 5 ) . furthermore it also could decrease calcination temperature and pbo volatility 采用二次合成法制备pmn - pt钙钛矿相，避免了pbo和nb _ 2o _ 5的直接反应，从而抑制了焦绿石相的生成。
After many studies and analysis , the optimum processes were obtained for preparing plct ( x ) nanometer - powders with pure perovskite structure by sol - gel technology using inorganic salts and singular metal alkoxide 采用sol ? gel制备技术，结合大量的研究和粉体制备技术分析，掌握了利用无机盐原料及单一金属醇盐制备完全钙钛矿结构plct ( x )纳米粉体的优化工艺。
The results show that the most titanium occurred in perovskite phase , which could be selectively preciptated and growth by optimizing heat treated condition , and then could be separated by mineral processing 研究结果表明：炉渣中大部分钛富集于钙钛矿相中；通过改性处理后，可以使钙钛矿晶体选择性析出并长大，进而采用选矿方法将其分离出来，为综合利用创造条件。
