Thermal expansion of some Ge-Se-Te glasses

Giridharan, A and Mahadevan, Sudha and Singh, AK (1988) Thermal expansion of some Ge-Se-Te glasses. Journal of Non-Crystalline Solids, 103 . pp. 73-78.

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Abstract

Results of measurements of the thermal expansion coefficient(from50C to the softening temperature)are reported for eight glass compositions of the Ge-Se-Te system.For (GeSe2)100-2xSexTex glasses,an increase of the glass transition temperature(Tg)and of a (the change in thermal expansion coefficient, a during glass transition)is seen with decreasing SeTe content.For(GeSe2)23.33Se30-Te glasses,a Tg and a are invariant with composition.The result obtained presently, when examined along with those obtained for other chalcogenide glasses,indicate that chalcogenide glasses are not necessarily in a stage of is a free volume during glass transition.values ranging from 0.024 to 0.67 are obtained for free volume of some chalcogenide glasses

Item Type:	Journal Article
Additional Information:	Copyright for this article belongs to Elsevier Science Publishers B.V
Uncontrolled Keywords:	Electrical conductivity;Measurement of thermal expansion; Ge-Se-Te;Germanium;Tellurium
Subjects:	CHEMISTRY AND MATERIALS > Propellants and Fuels
Division/Department:	Materials Science Division, Materials Science Division, Materials Science Division
Depositing User:	M/S ICAST NAL
Date Deposited:	23 Apr 2008
Last Modified:	07 May 2012 11:08
URI:	http://nal-ir.nal.res.in/id/eprint/4678

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