ULTRASONIC-ATTENUATION OF TELLURITE GLASSES

被引：55

作者：

ELMALLAWANY, R ^{[1
]}

SIDKEY, M ^{[1
]}

KHAFAGY, A ^{[1
]}

AFIFI, H ^{[1
]}

机构：

[1] NATL INST STAND,CAIRO,EGYPT

来源：

MATERIALS CHEMISTRY AND PHYSICS | 1994年 / 37卷 / 02期

关键词：

D O I：

10.1016/0254-0584(94)90093-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Investigations are reported of the longitudinal ultrasonic attenuation in tellurite glasses containing molybdenum oxide of different concentrations by using the pulse echo technique at 2, 4, 6 and 10 MHz in the temperature range 120-300 K. The results showed the presence of a very well defined peak which shifts to higher temperature with increasing frequency, suggesting a kind of relaxation process. Activation energies and relaxation frequencies were calculated; the activation energy was found to increase from 0.11 to 0.139 eV with the increase of molybdenum oxide from 20 to 50 mol.%.

引用

页码：197 / 200

页数：4

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