Glass Physics and Chemistry

, Volume 35, Issue 4, pp 364–368 | Cite as

Structure and physicochemical properties of glasses in the (As2Se3)1 − z -(SnSe2) zx -(Tl2Se) x and (As2Se3)1 − z -(SnSe) zx -(Tl2Se) x systems

  • G. A. Bordovskii
  • I. A. Dzemidko
  • A. V. Marchenko
  • P. P. Seregin
Article

Abstract

A comparative investigation of glasses in the As2Se3)1 − z -(SnSe2) zx -(Tl2Se) x and (As2Se3)1 − z -(SnSe) zx -(Tl2Se) x systems has been performed. In both systems, the glass formation regions are shifted toward the As2Se3 compound. Only tin(IV) in the structure of glasses in the (As2Se3)1 − z -(SnSe) zx -(Tl2Se) x system is identified by Mössbauer spectroscopy, whereas glasses in the (As2Se3)1 − z -(SnSe) zx -(Tl2Se) x system contain both Sn(II) and Sn(IV). The presence of tin in the oxidation state 2+ in the structural network of the glasses does not lead to impurity conduction. The dependences of the density, the microhardness, and the glass transition temperature on the glass composition are explained in the framework of the model according to which the structure of these glasses is built up of structural units corresponding to the As2Se3, AsSe, TlAsSe2, Tl2Se, SnSe, and SnSe2 compounds. It is established that, for crystalline alloys in the (As2Se3)1 − z -(SnSe) zx -(Tl2Se) x system, there exist two compounds (Tl2SnSe3 and Tl4SnSe4), which are formed by the peritectic reactions; however, structural units of these compounds are not formed in the structural network of glasses.

Keywords

Glass Transition Temperature Isomer Shift Glass Composition Glass Physic Chalcogenide Glass 

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References

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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • G. A. Bordovskii
    • 1
  • I. A. Dzemidko
    • 1
  • A. V. Marchenko
    • 1
  • P. P. Seregin
    • 1
  1. 1.Herzen Russian State Pedagogical UniversitySt. PetersburgRussia

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