铸造技术2014，Vol.35Issue(11)：2519-2521,3.
CaCu3Ti4O12多晶块体的巨介电常数研究
Giant Dielectric Constant of Polycrystalline Bulk CaCu3Ti4O12
摘要
Abstract
The polycrystalline bulk CaCu3Ti4O12 was prepared by solid-phase method,and the changes of dielectric constant with the temperature and frequency were investigated.The results show that the dielectric constant ofpolycrystalline bulk is up to 14 000 when the temperature is 300 K and the frequency is 1 kHz.The dielectric constant is nearly unchanged with the temperature when the frequency is 1 kHz.The polycrystalline bulk CaCu3Ti4O12 has a giant dielectric constant due to the dynamic changes of the polarization relaxation.At the same time,thermally activated polaron caused by mixed-valence Ti ions leaded to the unusual dielectric properties of polycrystalline bulk CaCu3Ti4O12关键词
铁电体/CaCu3Ti4O12多晶块/巨介电常数Key words
ferroelectrics/ polycrystalline bulk CaCu3Ti4O12/ giant dielectric constant分类
矿业与冶金引用本文复制引用
魏会贤,申海霞..CaCu3Ti4O12多晶块体的巨介电常数研究[J].铸造技术,2014,35(11):2519-2521,3.基金项目
河北省社会科学联合会基金资助项目(201303321) （201303321）
