新型含钆硫化物玻璃的制备与性能

研究了新型含钆硫化物玻璃，测试了玻璃的红外透射光谱、显微硬度、密度等性能以及XRD，DSC曲线。实验结果表明：Gd在Ge-S二元系统玻璃的富锗区具有较好的溶解性，最高引入量可达5％(摩尔分数)，但随引入量的增加析晶倾向增强。含钆硫化物的玻璃形成能力还随网络形成体Ge含量的减少而降低。含钆硫化物玻璃的透红外性能与Ge-S二元系统玻璃相似，但氧杂质吸收峰被消除或减弱，截止波长略有红移。其原因为前者可归于钆原子的较高负电极电位特性，后者与系统声子能量的降低有关。含钆玻璃的转变温度和显微硬度显著提高，这与玻璃结构的致密化和微晶化有关。

PREPARATION AND PROPERTIES OF NOVEL Gd-CONTAINING SULFIDE GLASSES

The novel Gd-containing sulfide glasses were investigated. Some glass properties including infrared spectra, microhardness, density and the curves of XRD and DSC were tested. Experimental results show that Gd cations have fairly good solubility in the Ge-rich region of the GeS binary system glass where the maximum Gd content can be reached to 5% in mole, but the tendency of crystallization rises with the increase of Gd content. The glass forming ability decreases as the content of network former Ge decreases. It is found that as the result of Gd-induced the oxygen impurities absorption bands are removed and weakened, which is attributed to the higher negative electrode potential of Gd atom. The IR cut-off edge of the Gd-containing glass shows a slight shift to the longer wavelength due to the heavier reduced mass of the system. The notable increases of glass microhardness and transition temperature are due to Gd addition, which is related to the joint effects of structure densification and microcrystallization process.