Hydrothermal Synthesis and Dielectric Characterization of a Double Perovskite Ba_2FeSbO_6  

作　　者：LI Min YUAN Hong-ming XU Wei HAN Mei YAO Lin-ran YANG Ming FENG Shou-hua 

机构地区：[1]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,P.R.China

出　　处：《Chemical Research in Chinese Universities》2012年第5期788-791,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.90922034, 20771042)

摘　　要：A double perovskite oxide Ba2FeSbO6 was hydrothermally synthesized and structurally characterized by X-ray diffraction. This solid compound shows a single phase and has a trigonal structure with space group R3 ？m and cell parameters of a=0.57261 nm and c=1.40244 nm. The dielectric constant and loss tangent of the solid measured in a frequency range from 100 Hz to 1 MHz at temperatures from 313 K to 513 K reveal a relaxation process of frequency dependence of the real part（ε＇） of dielectric constant and dielectric loss tan？. The frequency dependence of electrical property led to the framework of conductivity and electric modulus formalisms. The scaling behavior of imaginary part of electric modulus suggests that the relaxation describes the single mechanism at various temperatures. The variation tendency of the alternating current impedance indicates the thermally activated conduction process follows Jonsche＇s power law.A double perovskite oxide Ba2FeSbO6 was hydrothermally synthesized and structurally characterized by X-ray diffraction. This solid compound shows a single phase and has a trigonal structure with space group R3 ？m and cell parameters of a=0.57261 nm and c=1.40244 nm. The dielectric constant and loss tangent of the solid measured in a frequency range from 100 Hz to 1 MHz at temperatures from 313 K to 513 K reveal a relaxation process of frequency dependence of the real part（ε＇） of dielectric constant and dielectric loss tan？. The frequency dependence of electrical property led to the framework of conductivity and electric modulus formalisms. The scaling behavior of imaginary part of electric modulus suggests that the relaxation describes the single mechanism at various temperatures. The variation tendency of the alternating current impedance indicates the thermally activated conduction process follows Jonsche＇s power law.

关 键 词：Double perovskite Hydrothermal synthesis Electrical property 

分 类 号：TQ174.758[化学工程—陶瓷工业] TM911.4[化学工程—硅酸盐工业]