摘要
The title nanocrystalline powders were prepared by sol-gel method, the influences of grain size on crystal structure were investigated by XRD and DSC techniques. The experiment results show that the tetragonal ferroelectric phase content of the powders and the Curie temperature Tc are increased with the increase of grain size. When the grain size is less than 34. 7nm, crystal structure of the particle changes into cubic paraelectric phase and the transition of ferro-paraelectric phase disappears as well.
The title nanocrystalline powders were prepared by sol-gel method, the influences of grain size on crystal structure were investigated by XRD and DSC techniques. The experiment results show that the tetragonal ferroelectric phase content of the powders and the Curie temperature Tc are increased with the increase of grain size. When the grain size is less than 34. 7nm, crystal structure of the particle changes into cubic paraelectric phase and the transition of ferro-paraelectric phase disappears as well.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2000年第3期519-522,共4页
Chinese Journal of Inorganic Chemistry
基金
陕西省教委重点及专项科研基金
(No.97JZK14
No.99JK106)。
关键词
钡系钙钛矿铁电材料
晶粒尺寸
钇掺杂
晶体结构
Ba_(0.90)Sr_(0.08)Ca_(0.02)TiO_3 solid solution
nanocrystalline size doped with yttrium
crystal structure
