摘要：
In order to investigate the effect of the content of congeners S on the properties of seleniumbased chalcogenide glasses, a series of Ge25Sb10Se65-xSx (x=1, 5, 10, 15, 20) chalcogenide glasses were prepared by the melt quenching method.The amorphous state of the prepared glasses was analyzed with an X-ray diffractometer, their infrared transmittance was measured by fourier transform infrared spectroscopy, and their characteristic temperatures and the thermal expansion coefficients were obtained by the differential scanning calorimetry and the thermal mechanical analysis, respectively.Based on the experimental data, the variation of the parameters above with S content in the selenium-based chalcogenide glasses was analyzed.The experimental results show that a small amount of S has little effect on the infrared transmittance, while a large amount of S leads to a decrease in the infrared transmittance.The infrared cutoff wavelength is 12.5 μm.The addition of S helps to remove the absorption peak of Se-H bond at the wavelength of 4.08μm.And also the prepared glass samples gain good glass forming ability.With the increase of S content in the selenium-based chalcogenide glasses, the characteristic temperatures, including the glass transition temperature Tg, the initial crystallization temperature Tx, the crystallization peak temperature Tp, the strain point Tstrainand the annealing point Tanneal, show an increasing trend.The thermal expansion coefficient varies from 8.36×10-6 K-1, 1.70×10-5K-1, 1.71×10-5K-1, 1.75×10-5K-1 to 1.63×10-5K-1, indicating a rule of increasing first and then decreasing.%为了探究同族元素S的含量对硒基玻璃性能的影响,文中通过熔融淬冷法制备了一系列Ge25Sb10Se65-xSx(x=1,5,10,15,20)四元硒基玻璃试样.针对所制备试样,采用X射线衍射仪进行了非晶态分析,利用傅里叶变换红外光谱仪测定了红外透过率,分别用差式扫描量热仪和热机械分析仪标定了试样的特征温度,并计算了热膨胀系数.进而根据实验数据分析了上述参数随硫含量变化的规律.实验结果表明:少量S含量对红外透过率影响不大,而较多S含量会导致玻璃红外透过率降低.五组玻璃红外截止波长为12.5μm,S元素的加入有利于消除4.08μm处Se-H峰,玻璃成玻性能良好.随玻璃试样中硫元素含量的增加,玻璃的特征温度(包括玻璃转变温度Tg、起始析晶温度Tx、析晶峰温度Tp、应变点Tstrain和退火点Tanneal)均呈现增加趋势;热膨胀系数从8.36×10-6 K-1、1.70×10-5K-1、1.71×10-5K-1、1.75×10-5K-1到1.63×10-5K-1,呈现出先增大后减小的规律.
