The Oxygen-Ion Diffusion and Phase Transition in the La2Mo2-xWxO9 Samples Measured by Internal Friction Method

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The effects of tungsten doping on the oxygen-ion diffusion and the phase transition in La2Mo2–xWxO9 samples (x = 0.5, 0.75, 1.0, 1.2) were studied using internal friction method. The results show that two peaks were detected in the internal friction-temperature spectra in the La2Mo2-xWxO9 samples, the low-temperature relaxation peak is associated with oxygen ion diffusion, and the high-temperature peak is associated with a phase transition from the static disordered state to the dynamic disordered state of oxygen ion/vacancy distribution.

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8-11

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March 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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