摘要
The ceramics La_(0.85)Cr_(0.15)TiO_(x)and La_(0.7)Cr_(0.3)TiO_(x)are prepared by conventional solid-state reaction method.The dielectric properties of Cr-doped La TiO_(x)as a function of frequency(0.1 k Hz≤f≤1 MHz)and temperature(77 K≤T≤360 K)are studied.The blocks are then annealed in a flowing O2 or Ar/H_(2)to convert their oxygen content and the tests mentioned above are performed.The highly oxygenated samples exhibit extremely high low-frequency dielectric constants at room temperature(~10^(6)).The results show that the oxygen stoichiometry could significantly influence the dielectric properties of Cr-doped LaTiO_(x).
作者
Ming Ma
Yan Chen
Yi-Min Cui
马铭;陈彦;崔益民(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China;School of Physics,Beihang University,Beijing 100191,China)
基金
Project supported by the National Natural Science Foundation of China(Grant No.51571006)
