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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Electrical properties of A(2.6+x),Ti1.4-xCd(PO4)(3.4-x) (A = Li, K; x=0.0-1.0) phosphate glasses
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Electrical properties of A(2.6+x),Ti1.4-xCd(PO4)(3.4-x) (A = Li, K; x=0.0-1.0) phosphate glasses

机译：A（2.6 + x），Ti1.4-xCd（PO4）（3.4-x）（A = Li，K; x = 0.0-1.0）磷酸盐玻璃的电性能

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摘要

Electrical properties of A(2.6+x)Ti(1.4-x)Cd(PO4)(3.4-x) (A = Li, K; x = 0.0-1.0) phosphate glasses are investigated over a frequency range from 42 Hz to 1 MHz at different temperatures. Impedance spectroscopy is used to separate the bulk conductivity from electrode effect of electrical conductivity data. The bulk dc conductivity is Arrhenius activated, with activation energies and pre-exponential factors following the Meyer-Neldel rule. The real part of ac conductivity shows universal power law feature. The variation of dielectric constant with frequency is attributed to ion diffusion and polarization occurring in the phosphate glasses. The frequency dependent imaginary part of electric modulus M-n(omega) plot shows non-Debye feature in conductivity relaxation. The Kohirausch-Williams-Watts stretched exponential function was used to describe the modulus spectra and the stretching exponent beta is found to be temperature independent. Scaling in M-n(omega) shows that the electrical relaxation mechanisms are independent of temperature for given composition at different temperatures. (c) 2006 Elsevier B.V. All rights reserved.
机译：在42 Hz至1的频率范围内研究了A（2.6 + x）Ti（1.4-x）Cd（PO4）（3.4-x）（A = Li，K; x = 0.0-1.0）磷酸盐玻璃的电性能在不同温度下为MHz。阻抗光谱法用于将体电导率与电导率数据的电极效应分开。总体直流电导率是由Arrhenius激活的，其激活能量和预指数因子遵循Meyer-Neldel规则。交流电导率的实部表现出通用的幂律特征。介电常数随频率的变化归因于磷酸盐玻璃中发生的离子扩散和极化。电模M-n（ω）图的频率相关虚部显示出电导率松弛中的非德拜特征。使用Kohirausch-Williams-Watts拉伸指数函数描述了模量谱，发现拉伸指数β与温度无关。 M-n（ω）的缩放表明，对于不同温度下给定的成分，电弛豫机制与温度无关。 （c）2006 Elsevier B.V.保留所有权利。

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