Impedance spectroscopy analysis of CeNbO4.25
来源期刊：JOURNAL OF RARE EARTHS2013年第9期
论文作者：李琴 王金玲 张国光
文章页码：923 - 926
摘 要：Monoclinic CeNbO4.25 was prepared by solid state reaction.Complex impedance analysis indicated the presence of grain interior effect along with the grain boundary contribution.The values of ionic transference number ti below 423 K were calculated to be about 0.5.The activation energies of ionic conductivity and electronic conductivity were deduced to be 36.0 and 37.2 kJ/mol,respectively.The real part of the AC conductivity was frequency dependent.At high frequencies corresponding to the grain interior effect,the non-Debye nature of the AC conductivity was interpreted by the correlated hopping of interstitial oxygen with the electron holes on the basis of the correlated barrier hopping（CBH） model.
李琴，王金玲，张国光
School of Materials Science and Technology,Nanchang Hangkong University
摘 要：Monoclinic CeNbO4.25 was prepared by solid state reaction.Complex impedance analysis indicated the presence of grain interior effect along with the grain boundary contribution.The values of ionic transference number ti below 423 K were calculated to be about 0.5.The activation energies of ionic conductivity and electronic conductivity were deduced to be 36.0 and 37.2 kJ/mol,respectively.The real part of the AC conductivity was frequency dependent.At high frequencies corresponding to the grain interior effect,the non-Debye nature of the AC conductivity was interpreted by the correlated hopping of interstitial oxygen with the electron holes on the basis of the correlated barrier hopping（CBH） model.
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