A.C. conductivity and relaxation dynamics in zinc-borate glasses

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• 作者：Ghada E. El-Falaky^a ; ^{ghado_2006@yahoo.com} ; Osiris W. Guirguis^a ; Nadia S. Abd El-Aal^b
• 关键词：Zinc&ndash ; borate glasses ; A.C. conductivity ; Dielectric properties ; Impedance properties
• 刊名：Progress in Natural Science
• 出版年：2012
• 期刊代码：P49_10020071
• 类别：env
• 出版时间：April, 2012
• 卷：22
• 期：2
• 页码：86-93
• 文件大小：736 K

摘要

The frequency-dependent dielectric dispersion of ZnO-Na₂O-Al₂O₃-B₂O₃ (in mol%) glass prepared by the melt quenching technique is investigated in the temperature ranges from room temperature to 420 K. Dielectric relaxation has been analyzed based on the behavior of electric modulus behavior. An analysis of the real and imaginary parts of dielectric is performed assuming the ideal Debye behavior as confirmed by Cole-Cole plot. The activation energy associated with the dielectric relaxation determined from the electric modulus spectra was found to be 1.863 eV, which is close to that the activation energy for d.c. conductivity (1.871 eV), indicating the similar nature of relaxation and conductivity.