Electrical relaxation studies of solution combustion synthesized nanocrystalline Li₂NiZrO₄ material

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• 作者：Rajesh Cheruku ; Lakshmi Vijayan ; G. Govindaraj ; ^{ggraj_7@yahoo.com}
• 关键词：Nanocrystalline ; Chemical synthesis ; Li2NiZrO4 ; Electrical properties
• 刊名：Materials Science and Engineering ; B
• 出版年：2012
• 期刊代码：76_09215107
• 类别：ch
• 出版时间：25 June, 2012
• 卷：177
• 期：11
• 页码：771-779
• 文件大小：988 K

摘要

A lithium-rich Li₂NiZrO₄ is synthesized by solution combustion technique in phase pure nanocrystalline form for the first time. The material is crystallized in the cubic structure of space group with lattice parameter: a = 4.2457(3) 脜 and the average crystallites size is 55 nm. Nanocrystalline nature of the sample is confirmed through transmission electron microscopy. Ac electrical properties are investigated and the activation energy for cross-over frequency is less than that of conduction as evident from Almond and West formalism. The conductivity and modulus formalisms provide nearly the same activation energies for electrical relaxation of mobile ions. The frequency dependent plots of M鈥?and Z鈥?show that the electrical relaxation is non-Debye in nature. The scaling behavior of M鈥?and Z鈥?formalisms confirmed the temperature independent nature of relaxation mechanism.