Accepted:
12 Sep 2002
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/vol09/elkhol01/ | © Copyright 2002 | |||
| Volume 09 | Received: Accepted: |
17 May 2001 12 Sep 2002 |
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The dielectric polarizability of amorphous Bi2O3-Cu2O glasses
Elkholy, M.M. & Sharaf El-Deen, L.M. |
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| Abstract | |
| Glass with the composition (100-x)Bi2O3-xCu2O 10=x=50 were prepared by conventional melt quenching. The dielectric constant and the loss factor were measured for Cu2O–Bi2O3 glassy system in the frequency range 0.5-25 kHz at different temperatures from 120-300 K. The dielectric constant and the loss factor have been decreased with increasing frequency, while both of them increased by increasing temperature. The decreasing of the dielectric constant with frequency was attributed at low frequency, to the polarizability arising from electronic, ionic and orientational components, while at higher frequencies the ionic and orientational polarizability is nearly absent. The increasing of the dielectric constant with temperature was due to the combination of the electronic, ionic, and orientational polarizability in the increasing sense. The decreasing of the loss factor with frequency was attributed at low frequency to the migration of ions as a main source of the dielectric loss in addition to the electronic polarization loss, while at high frequency; the ion vibrations may be the only source of the dielectric loss. The increasing of the loss factor with increasing temperature was attributed to the relaxation loss in addition to the conduction loss which increased rapidly with temperature. | |
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Multimedia Links (none) Reference Links (none) Citation Reference Elkholy, M.M. & Sharaf El-Deen, L.M. (2002), The dielectric polarizability of amorphous Bi2O3-Cu2O glasses, Complexity International, Volume 09, Paper ID: elkhol01, URL: http://www.complexity.org.au/vol09/elkhol01/ |
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