文献类型：期刊文献

英文题名：Synthesis, crystal structure and electric conductivity of La_0.9Ca_0.1Cr_0.5B_0.5O₃ (B = Mn, Fe, Ni)

作者：Xiong, H; Zhang, GJ; Zheng, JY; Jia, YQ

机构：[1]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2001

卷号：51

期号：1

起止页码：61

外文期刊名：MATERIALS LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000171514600011)】；

语种：英文

外文关键词：synthesis; crystal structure; electric conductivity; ionization energy

摘要：The series compounds La0.9Ca0.1Cr0.5B0.5O3 (B = Mn, Fe, Ni) are synthesized by a wet chemical method. The crystal structure of the compounds belongs to the orthorhombic system. The electric conductivity of the compound in air is measured over a temperature range from 293 to 1073 K. The conductivity activation energy of the compound varies with the B ion. The electric conductivity of the compound increases gradually from La0.9Ca(0.1)Cr(0.5)Mn(0.5)O(3) to La0.9Ca0.1Cr0.5Fe0.5O3 and La0.9Ca0.1Cr0.5Ni0.5O3. The difference between the electrical conductivities of the compounds may be related not only to the difference between the activation energies, but also to that between the relative contents of the tetravalent chromium ion in the compounds caused by doping metal ions with different valence orbital ionization energy of 3d electron. (C) 2001 Elsevier Science B.V. All rights reserved.