新型GeSe2-In2Se3-AgI玻璃性能研究

采用传统熔融-淬冷法制备了一系列新型(100-x) (4GeSe₂-In₂Se₃) -xAgI(x=20,30,40 mol%)硫系玻璃样品.利用X射线衍射分析、差热分析、可见-近红外吸收光谱、红外透过光谱、喇曼分析等技术手段研究了该玻璃系统的组成、结构、热稳定性和光学特性等.利用Tauc方程计算出了样品的间接带隙;测试了部分样品在不同升温速率下的差示扫描量热曲线,并采用Kissinger法计算了玻璃样品的析晶活化能.X射线衍射数据表明,该玻璃体系在较宽的组分范围内有良好的非晶特性,成玻范围较宽;差热分析和析晶动力学研究表明,玻璃样品70(4GeSe₂-In₂Se₃)-30AgI具有较好的热稳定性(ΔT=114℃)和较高的活化能(E_a=320.4 kJ/mol).随着AgI含量的增加,玻璃的短波吸收限蓝移,并且光学带隙有增大的趋势.此外,红外透过光谱分析表明该玻璃体系具有良好的红外透过性能,其红外截止波长不会随着AgI含量的增加而发生明显变化,皆为16μm左右.

Investigation of GeSe2-In2Se3-AgI Chalcogenide Glasses

(100-x)(4GeSe₂-In₂Se₃)-xAgI (x=20,30,40 mol%) chalcogenide glasses were prepared by traditional melt-quenching method. In this paper, the X-ray diffraction(XRD),differential thermal analysis (DTA), visible/near-infrared absorption spectroscopy, infrared transmission spectra,Raman analysis were adopt to the analysis of the relationships of the composition, structure, thermal stability, and optical properties of the GeSe₂-In₂Se₃-AgI ternary glass system. The Tauc equation was used to calculate the indirect optical band gap. From the heating-rate dependence of crystallization temperature, the activation energy for crystallization(E) was calculated by the Kissinger equation.The glass samples are amorphous, resulting in a wide composition range of glass formation. A maximum ΔT value of 114℃ and the activation energy for crystallization(E_a=320.4 kJ/mol) were obtained for the glass composition 70(4GeSe₂-In₂Se₃) -30AgI. With the addition of AgI, the short-wave absorption of the glasses shifts to the shorter wavelength and the optical band gap increases. In addition, the infrared transmission spectra shows that these prepared glasses all have wide optical transmission and there has been no significant change in infrared cut-off wavelength of the glasses which are all 16 μm or so.