新型含钆硫化物玻璃的制备与性能

【作者】 聂佳相； 赵东辉； 陈玮； 陈国荣；

【Author】 Xianghua Zhang;Hongli Ma;Jean-Luc Adam Laboratoire des Verres et Ceramiques, Universite de Rennes I, Rennes cedex, France

【机构】 华东理工大学无机材料系；

【摘要】 本实验首次研究了新型含钆硫化物玻璃.性能测试包括红外透射光谱、显微硬度、密度以及XRD、DSC.实验结果显示,Gd在富锗区具有较好的溶解性,最高引入量可达5 at%,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,但氧杂质吸收峰得以消除或减弱,截止波长略有红移.前者归因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.更多还原

【Abstract】 Novel Gd-containing sulfide glasses are investigated for the first time. Gd cations have fairly good solubility in theGe-rich region of the Ge-S binary system where the maximum Gd content can reach 5 at %. Solubility of Gdcations is also found proportional to Ge content due to the partitioning role of extra Ge as the network modifier.Gd-induced removal and weakening of oxygen impurities absorption bands is found which is attributed to thehigher negative electrode potential of Gd atom. The IR cut-off edge of the Gd-containing glass shows a slight shiftto the longer wavelength due to the heavier reduced mass of the system. Improvements on microhardness H_v andtransition temperature T₈ due to Gd addition are notable which is due to the joint effects of structure densificationand microcrystallization process.更多还原