Structural Investigations of Glass Ceramics in the Ga2S3−GeS2−CsCl System

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• 作者：Yannick Ledemi ; Bruno Bureau ; Laurent Calvez ; Marie Le Floch ; Mathieu Roz ; Changgui Lin ; Xiang H. Zhang ; Mathieu Allix ; Guy Matzen ; Younes Messaddeq
• 刊名：Journal of Physical Chemistry B
• 出版年：2009
• 出版时间：November 5, 2009
• 年：2009
• 卷：113
• 期：44
• 页码：14574-14580
• 全文大小：316K
• 年卷期：v.113,no.44(November 5, 2009)
• ISSN：1520-5207

文摘

Transparent glass ceramics have been prepared in the Ga₂S₃−GeS₂−CsCl pseudoternary system using appropriate heat treatment time and temperature. In situ X-ray diffraction at the heat treatment temperature and ¹³³Cs and ⁷¹Ga solid-state nuclear magnetic resonance have been performed in function of annealing time to understand the crystallization process. Both techniques have evidenced the nucleating agent role played by gallium with the formation of Ga₂S₃ nanocrystals. On the other hand, cesium is incorporated very much later into the crystallites during the ceramization. Moreover, the addition of CsCl, which is readily integrated into the glassy network, permits us to shift the optical band gap toward shorter wavelength. Thus, new glass ceramics transmitting in the whole visible range up to 11.5 μm have been successfully synthesized from the (Ga₂S₃)₃₅−(GeS₂)₂₅−CsCl₄₀ base glass composition.