Internal friction study of oxygen ion conductors La1.95K0.05Mo2−xTxO9−δ(T=Fe,Mn)
作者： C. Li , Q. F. Fang , X. P. Wang , J. X. Wang , D. Li
DOI: 10.1063/1.2715795
关键词:
摘要: Based on the oxygen ion conductor La 2 Mo O 9 , a series of K, Fe, and Mn doped samples 1.95 K 0.05 − x T δ ( = Fe ; 0 0.025 0.1 ) were prepared with conventional solid-state reaction method. The effects doping cationic anionic ionsdiffusion,phase transition, electrical conductivity studied. mechanical spectroscopy (or internal friction) technique was exploited to investigate microscopic transport mechanism deduce dynamical relaxation parameters. Three friction peaks P L H M observed in samples, among which are relaxational type while is associated kind phase transition. results revealed that peak originated from short-distance jumps vacancies, diffusion (Fe) ions transition static disordered state dynamic distribution. measurements, it can be concluded high-temperature improved obviously by or at site low-temperature increased simultaneous site.
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sci-hub.se 参考文章(23)
D. Marrero-López, J. Canales-Vázquez, J.C. Ruiz-Morales, J.T.S. Irvine, P. Núñez, Electrical conductivity and redox stability of La2Mo2−xWxO9 materials Electrochimica Acta. ,vol. 50, pp. 4385- 4395 ,(2005) , 10.1016/J.ELECTACTA.2005.02.002
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
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
Q.F Fang, X.P Wang, G.G Zhang, Z.G Yi, Damping mechanism in the novel La2Mo2O9-based oxide-ion conductors Journal of Alloys and Compounds. ,vol. 355, pp. 177- 182 ,(2003) , 10.1016/S0925-8388(03)00278-0
Juan Rodríguez-Carvajal, Recent advances in magnetic structure determination by neutron powder diffraction Physica B: Condensed Matter. ,vol. 192, pp. 55- 69 ,(1993) , 10.1016/0921-4526(93)90108-I
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
M. Laarj, S. Kacim, B. Gillot, Cationic Distribution and Oxidation Mechanism of Trivalent Manganese Ions in Submicrometer MnxCoFe2−xO4Spinel Ferrites Journal of Solid State Chemistry. ,vol. 125, pp. 67- 74 ,(1996) , 10.1006/JSSC.1996.0266
Q. F. Fang, X. P. Wang, G. G. Zhang, Z. J. Cheng, Evolution of internal friction and dielectric relaxation peaks in La2Mo2O9-based oxide-ion conductors assessed by a nonlinear peak-fitting method Physica Status Solidi (a). ,vol. 202, pp. 1041- 1047 ,(2005) , 10.1002/PSSA.200420023
Philippe Lacorre, François Goutenoire, Odile Bohnke, Richard Retoux, Yvon Laligant, Designing fast oxide-ion conductors based on La2Mo2O9 Nature. ,vol. 404, pp. 856- 858 ,(2000) , 10.1038/35009069
G. Corbel, Y. Laligant, F. Goutenoire, E. Suard, P. Lacorre, Effects of Partial Substitution of Mo6+ by Cr6+ and W6+ on the Crystal Structure of the Fast Oxide-Ion Conductor Structural Effects of W6+. Chemistry of Materials. ,vol. 17, pp. 4678- 4684 ,(2005) , 10.1021/CM0501214