摘要
The ceramics La0.85Cr0.15TiOx and La0.7Cr0.3TiOx are prepared by conventional solid-state reaction method. The dielectric properties of Cr-doped La TiOx 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/H2 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 LaTiOx.
The ceramics La0.85Cr0.15TiOx and La0.7Cr0.3TiOx are prepared by conventional solid-state reaction method. The dielectric properties of Cr-doped La TiOx 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/H2 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 LaTiOx.
作者
马铭
陈彦
崔益民
Ming Ma1, Yan Chen2, and Yi-Min Cui2(1 School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China;2School of Physics, Beihang University, Beijing 100191, Chin)
基金
Project supported by the National Natural Science Foundation of China(Grant No.51571006)
