摘要
采用固相反应法制备了不同化学计量比的CaCu3Ti4O12(简称CCTO)陶瓷。当Ca、Cu、Ti的原子摩尔比为1.08∶3.00∶4.44时,获得了相对介电常数在1kHz下高达4×105(1kHz)的巨介电CCTO陶瓷,其介电常数比标准化学计量比CCTO陶瓷高约一个数量级。结合XRD、SEM、EDX等分析表征结果,对巨介电常数的物理机理进行了探讨。
Non-stoichiometry CaCu3Ti4O12（CCTO）ceramics are prepared by the conventional solid-state reaction method.Relative dielectric constant of CCTO ceramics attain 4×105（1kHz） if the atoms mol ratio of Ca,Cu,Ti elements are 1.08∶3.00∶4.44.It is one magnitude higher than stoichiometry CCTO ceramics.Microstructures and crystalline structures and component analyzing are examined by scanning electronic microscopy（SEM）,X-ray diffraction（XRD） and energy dispersive Y-ray spectroscopy（EDX）,respectively.The giant dielectric constant mechanism of CCTO ceramics is discussed.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2010年第2期211-213,217,共4页
Journal of Functional Materials
基金
"十一五"电子预研基金资助项目(YW030408B)
