Dielectric Properties of Ternary ( ) ( )x ( ) x ZnO MgO PO 30 2 5 70− (x = 5, 8, 13) Glasses
Keywords:Dielectric relaxation, Complex permittivity, Phosphate glasses,
Abstract(ZnO)30(MgO)x(P2O5)70-x glasses of the composition x = 5, 8 and 13 mol % have been prepared by melt quenching technique. The dielectric permittivity (89) and loss factor (8:) were measured in the frequency range from 0.01 Hz to 1 MHz and in the temperature range 303 to 573 K . From the results there are evidence of dipolar relaxation occurring between 103 – 106 Hz while at low frequency the spectrum is dominated by dc conduction which manifested by the 1/@ slope of loss factor plot. Value of the relaxing frequency (@p) plotted against 1/T shows one electrical transportation mechanism. The empirical data was sufficiently fitted by using Harviliak-Negami equation.
Murali Krishna, N. Veeraiah, N. Venkatramaiah, R. Venkatesan, J. of Alloys and Compounds, 450 (2008) 477-485.
G. Sahaya Baskaran, M. V. Ramana Reddy, D. Krishna Rao, N. Veeraiah, J. of Solid State Communications, 145 (2008) 401-406.
T. Sankarappa, M. Prashant Kumar, G. B. Devidas, N. Nagaraja, R. Ramakrishnareddy, J. Molecular Structure, 889 (2008) 308-315.
A. Mogus-Milankovic, V. Licina, S. T. Reis, D. E. Day, J. Non-Cryst. Sol., 353 (2007) 2659-2666.