Glass formation and properties of Ge-Ga-Te-ZnI₂ far infrared chalcohalide glasses

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• 作者：Huijuan Xu ; Xunsi Wang ; Qiuhua Nie ; Yuju He ; Peiquan Zhang ; Tiefeng Xu ; Shixun Dai ; Xianghua Zhang
• 关键词：Chalcogenide glass ; Far-infrared ; Te-based
• 刊名：Journal of Non-Crystalline Solids
• 出版年：1 January, 2014
• 年：2014
• 卷：383
• 期：Complete
• 页码：212-215
• 全文大小：494 K

文摘

In order to develop novel far infrared window material, a series of Ge-Ga-Te-ZnI₂ chalcohalide glasses were prepared by traditional melt-quenching method and their glass-forming region was determined also. Here, some measurements including X-ray diffraction (XRD), differential thermal analysis (DTA), UV-Vis-NIR absorption spectrum, and infrared optical transmission spectra were carried out. The allowed indirect transition optical band gap was calculated according to the classical Tauc equation. The results show that with the addition of ZnI₂, the glass-forming ability and thermal stability are improved gradually. With the contents of ZnI₂ increased from 5 to 20 at.%, continued blue-shifting occurs in the cutting-off absorption edge of short-wavelength and the values of indirect optical band gaps were observed with ranges from 0.596 to 0.626 eV in these glasses. These GeTe_4.3-GaTe₃-ZnI₂ glasses show wide optical transmission and the infrared cut-off wavelengths are larger than 25 渭m, which implies that the Ge-Ga-Te-ZnI₂ chalcogenide glasses possess the potential of far-IR optical window applications.