Ultrasonic investigation and infrared absorption of some sodium borate glasses
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Ultrasonic velocities and absorption measurements in sodium borate glasses containing Na2O have been made using the pulse echo technique at 4, 5 and 6 MHz. Results showed an increase in velocity as the sodium oxide content (mol%) increased. The ultrasonic absorption results showed the presence of very high and well-defined peak which shifts its position to lower temperatures with increasing frequency. This suggests some sort of relaxation process and the activation energy of this process increased with increasing Na2O concentration (mol%). The infrared absorption spectra of sodium borate glasses confirmed the results obtained by ultrasonic investigations.
KeywordsPolymer Activation Energy Absorption Spectrum Borate Absorption Measurement
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- 1.S. S. Bhatti and S. Santokh, J. Pure Appl. Ultrason. 8 (1986) 101.Google Scholar
- 6.G. Brage, in “Ultrasonic Symposium”, Annoplis, MD, USA (1976) p. 83.Google Scholar
- 8.M. J. Lin and R. L. Thomas, “Phonon Scattering in Condensed Matter” (Plenum, Providence, NY, 1980).Google Scholar
- 9.A. P. Singh, S. Gurjit and S. S. Bhatti, J. Pure Appl. Ultrason. 11 (1989) 49.Google Scholar