物理学报2012，Vol.61Issue(20)：466-472,7.
简化共沉淀法制备CaCu3Ti4O12陶瓷及其介电性能研究
Dielectric properties of CaCu3Ti4O12 ceramics prepared by a simplified coprecipitation method
摘要
Abstract
Precursor powder of CaCu3Ti4O12 is prepared by a simplified coprecipitation process, in which an optimum reaction condition with ammonium acetate is used as buffer solution and pH -- 3.0 is proved by X-ray diffraction and scanning electron microscope. The CaCu3Ti4O12 ceramics samples are prepared by sintering the calcined powder at different temperatures (1040 ℃-1100 ℃). It is found that higher sintering temperature of CaCu3Ti4O12 ceramics will lead to lager grain size, higher dielectric constant and lower dielectric loss. The dielectric loss of CaCu3Ti4O12 ceramics is suggested to be due to DC electric conductivity, low-frequency relaxation loss and high-frequency relaxation loss. The low-frequency and high-frequency relaxations are related to grain boundary and oxygen vacancy defects respectively.关键词
巨介电常数/共沉淀法/松弛极化/CaCu3Ti4o12陶瓷Key words
giant dielectric constant/simplified coprecipitation/relaxation polarization/CaCu3Ti4O12 ceramics分类
化学化工引用本文复制引用
贾然,顾访,吴珍华,赵学童,李建英..简化共沉淀法制备CaCu3Ti4O12陶瓷及其介电性能研究[J].物理学报,2012,61(20):466-472,7.基金项目
国家自然科学基金,(批准号：50977071,50972118,51177121)资助的课题. （批准号：50977071,50972118,51177121）
