Phase Transition and Oxygen Ion Diffusion in (La1xLnx)2Mo2O9 (Ln = Nd, Gd, x = 0.05-0.25) Using Dielectric Relaxation Method
作者： Qian-feng Fang , Zhong Zhuang , Xian-ping Wang , Dan Li , Jian-xin Wang
DOI: 10.1088/1674-0068/21/03/270-274
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摘要: Dielectric relaxation method was employed to study the properties of oxygen ion diffusion and phase transition in oxide-ion conductors (La1−xLnx)2Mo2O9 (Ln = Nd, Gd, x 0.05-0.25). Two dielectric loss peaks were observed: peak Pd at about 600 K Ph around 720 K. Peak is a relaxational associated with short-range ions, while hardly changes its position dramatically decreases height increasing frequency, exhibiting non-relaxational nature. With Ln3+ concentration, heights increase first then decrease after passing maximum 15% doping. It suggested that related static disordered state dynamic ions/vacancies distribution. found 15%Gd or 15%Nd doped La2Mo2O9 samples exhibit highest conductivity accordance this doping content.
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sci-hub.se 参考文章(29)
Z. S. Khadasheva, N. U. Venskovskii, M. G. Safronenko, A. V. Mosunov, E. D. Politova, S. Yu. Stefanovich, Synthesis and properties of La2(Mo1-xMx)2O9 (M = Nb, Ta) ionic conductors Inorganic Materials. ,vol. 38, pp. 1168- 1171 ,(2002) , 10.1023/A:1020978902757
C. Li, X.P. Wang, J.X. Wang, D. Li, Z. Zhuang, Q.F. Fang, Study on the electrical conductivity and oxygen diffusion of oxide-ion conductors La2Mo2−xTxO9−δ (T = Al, Fe, Mn, Nb, V) Materials Research Bulletin. ,vol. 42, pp. 1077- 1084 ,(2007) , 10.1016/J.MATERRESBULL.2006.09.014
XP Wang, QF Fang, ZS Li, GG Zhang, ZG Yi, None, Dielectric relaxation studies of Bi-doping effects on the oxygen-ion diffusion in La2−xBixMo2O9 oxide-ion conductors Applied Physics Letters. ,vol. 81, pp. 3434- 3436 ,(2002) , 10.1063/1.1518151
C. Li, Q. F. Fang, X. P. Wang, J. X. Wang, D. Li, Z. Zhuang, Internal friction study of oxygen ion conductors La1.95K0.05Mo2−xTxO9−δ(T=Fe,Mn) Journal of Applied Physics. ,vol. 101, pp. 083508- ,(2007) , 10.1063/1.2715795
X. P. Wang, D. Li, Q. F. Fang, Z. J. Cheng, G. Corbel, P. Lacorre, Phase transition process in oxide-ion conductor β-La2Mo2−xWxO9 assessed by internal friction method Applied Physics Letters. ,vol. 89, pp. 021904- ,(2006) , 10.1063/1.2220056
D. Li, X. P. Wang, Q. F. Fang, J. X. Wang, C. Li, Z. Zhuang, Phase transition associated with the variation of oxygen vacancy/ion distribution in the oxide‐ion conductor La2Mo2–xWxO9 Physica Status Solidi (a). ,vol. 204, pp. 2270- 2278 ,(2007) , 10.1002/PSSA.200622498
J Lane, Oxygen transport in La0.6Sr0.4Co0.2Fe0.8O3−δ Solid State Ionics. ,vol. 121, pp. 201- 208 ,(1999) , 10.1016/S0167-2738(99)00014-4
D Marrero-López, P Nunez, M Abril, V Lavin, UR Rodríguez-Mendoza, VD Rodríguez, None, Synthesis, electrical properties, and optical characterization of Eu3+-doped La2Mo2O9 nanocrystalline phosphors Journal of Non-crystalline Solids. ,vol. 345, pp. 377- 381 ,(2004) , 10.1016/J.JNONCRYSOL.2004.08.047
X Wang, Effects of Ca doping on the oxygen ion diffusion and phase transition in oxide ion conductor La2Mo2O9 Solid State Ionics. ,vol. 146, pp. 185- 193 ,(2002) , 10.1016/S0167-2738(01)00988-2
Philippe Lacorre, Ania Selmi, Gwenaël Corbel, Brigitte Boulard, On the Flexibility of the Structural Framework of Cubic LAMOX Compounds, in Relationship with Their Anionic Conduction Properties Inorganic Chemistry. ,vol. 45, pp. 627- 635 ,(2006) , 10.1021/IC0513080