Properties of structure and mid-infrared transmission in TeO2-ZnCl2-BaO-NaF glass system

制备了一种新型的氧卤碲酸盐玻璃：（80-x）TeO2—15ZnCl2-xBaO-5NaF（x=30、20、10、0mol％），对玻璃的机械强度、热稳定性、拉曼光谱、紫外吸收光谱、红外透过光谱等特性进行了研究．通过拉曼光谱分析研究了玻璃组分含量的变化对玻璃结构和红外透过性能的影响．结果表明，随着BaO含量的增加，玻璃在红外波段透过率显著增加，并且红外透过截止波长向长波方向移动，本文对这一实验结果进行了机理性的研究探讨．同时，通过在熔制过程中通入高纯O2，以及引入适量的卤化物有效地除去玻璃中的[OH]基团，使Oxyhalide tellurite glasses: (80-x)TeO2-15ZnCl(2-)xBaO-5NaF(x=30,20,10,0mol%) were prepared. The mechanical strength performance, thermal properties, Raman spectra, UV absorption spectra and Infrared transmission spectra of the samples were investigated. The effects of composition content change on the structure and infrared transmission properties of glasses were investigated by means of Raman scattering. The results show that the transmission in mid-infrared region significantly increases and the IR cut-off shifts towards longer wavelength with increasing BaO, the mechanism was also discussed. The addition of halide to the glasses and the treatment with pure 02 during melting are useful for the decrease of OH-1 absorption bands, meanwhile the infrared transmittance is increased. The presented oxyhalide tellurite glass is a kind of optical material with high infrared transmission. It exhibits a high transmittance (>= 80%) in the mid-infrared regions and possesses an infrared cut-off edge up to 6.5 mu m