| Original Articles |
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Phase Transition Kinetics in Bi3NbO7 Evaluated by in situ Isothermal Conductivity Measurements |
| WANG Xian-Ping;CHENG Zhi-Jun;FANG Qian-Feng |
| Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 |
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| Cite this article: |
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WANG Xian-Ping, CHENG Zhi-Jun, FANG Qian-Feng 2007 Chin. Phys. Lett. 24 1013-1016 |
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Abstract Kinetics of phase transformation from pseudocubic to tetragonal phase
in Bi3NbO7 solid solution is studied by using the ac impedance method under isothermal conditions. Conductivity of the investigated compound is used to characterize the kinetic process of the transition. The Avrami exponent and the activation energy of phase transition are around 1.5 and 3.5eV, respectively. These kinetic parameters reveal that the pseudocubic-tetragonal transition in Bi3NbO7 belongs to a three-dimensional diffusion-controlled
growth with zero nucleation rate.
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| Keywords:
64.70.Kb
66.10.Ed
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Received: 21 December 2006
Published: 26 March 2007
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