Glass formation and properties of GeTe₄–Ga₂Te₃–AgX (X = I/Br/Cl) far infrared transmitting chalcohalide glasses

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• 作者：Qiuhua Nie ; Guoxiang Wang ; Xunsi Wang ; Shixun Dai ; Shengwei Deng ; Tiefeng Xu ; Xiang Shen
• 关键词：Tellurium-based glasses ; Thermal stability ; Infrared spectroscopy
• 刊名：Optics Communications
• 出版年：2010
• 出版时间：15 October 2010
• 年：2010
• 卷：283
• 期：20
• 页码：4004-4007
• 全文大小：563 K

文摘

A new family of Tellurium-based glasses GeTe₄–Ga₂Te₃–AgX (X = I/Br/Cl) has been investigated and the glass-forming region was determined. Properties measurements include XRD, DTA, vis-NIR, and IR transmission spectra. The amorphous nature of the glasses has been proved by X-ray diffraction. Among the three systems, the GeTe₄–Ga₂Te₃–AgI glass system shows superior glass-forming ability and thermal stability. The maximum value of ΔT (= T_x − T_g) lies at about 110 °C for the glass composition 60GeTe₄–2-20Ga₂Te₃–20AgI, while for 60GeTe₄–20Ga₂Te₃–20AgBr and 60GeTe₄–20Ga₂Te₃–20AgCl, the ΔT values are both only 88 °C. Most of the studied glasses have a wide optical transmission window from 1.8 to 25 μm.