Microstructures and electric characteristics of SrNdCoO4 ceramics with K2NiF4 structure
Microstructures and electric characteristics of SrNdCoO4 ceramics with K2NiF4 structure
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K2NiF4结构SrNdCoO4陶瓷的显微组织和电学特性
DOI：
10.1007/s10832-007-9261-9
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发表时间：
2008
影响因子：
1.7
通讯作者：
Lei Li
中科院分区：
文献类型：
--
作者：
Yunkui Liu;X. Chen;X. Liu;Lei Li
采用固相反应法制备了具有四方k2nif4结构的srndcoo4陶瓷。研究了介质和导电性能对频率和温度的依赖关系。介电常数（ε）和电导率（σ）随温度变化在~ 325°C处均出现峰值。在O2中退火后，α的峰值消失，σ的峰值向高温侧略微移动。因此，多晶SrNdCoO4中存在一些氧化空位，在测量温度和频率范围内，氧化空位对σ的影响很小，但对σ的影响很大。在1150℃下烧结的srndcoo4陶瓷的电阻率较低，为3.7 Ωcm。
SrNdCoO4ceramics with tetragonal K2NiF4structure were prepared by a solid-state reaction process. The frequency and temperature dependence of dielectric and conductive properties were studied. A peak was found at ∼325 °C on both dielectric constant (ɛ) and conductivity (σ) plots with temperature. After annealing in O2, the peak ofɛdisappeared while that ofσjust shifted a little toward high temperature side. So, some oxide vacancies existed in the polycrystalline SrNdCoO4, which contributed much toɛbut influenced σ only slightly in the measured temperature and frequency range. A lower resistivity of 3.7 Ωcm was obtained in SrNdCoO4ceramics sintered at 1150 °C.
DOI：
10.1007/bf01303701
发表时间：
1986-01-01
期刊：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
影响因子：
--
作者：
BEDNORZ, JG;MULLER, KA
通讯作者：
MULLER, KA
影响因子：
1.7
作者：
Y. Furukawa;S. Wada;Yoshihiro Yamada
通讯作者：
Y. Furukawa;S. Wada;Yoshihiro Yamada