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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