掺铒磷酸盐玻璃反应气氛法除水的研究

制备了不同含水量的掺铒磷酸盐玻璃，研究了各种工艺参数对反应气氛法除水效果的影响。结果表明由鼓泡气体带入的除水剂是玻璃除水的主要动力；在通气最初阶段的除水速率最快，并且提高除水温度、增大通气流量均有助于提高除水效率；结合实验从反应热力学角度讨论了除水机理，并指出在玻璃熔体中除水反应受熔体“笼效应”影响，反应速率大小取决于OH与CCl4形成偶遇对概率的大小。

Removal of OH Groups in Er3+)-doped Phosphate Glasses by Reaction Atmosphere Process

Er3+-doped phosphate glasses with various concentrations of OH groups were fabricated. The effects of technological parameters on result of Reaction Atmosphere Process were investigated. The dehydrate process was discussed by thermodynamic theory of open system. The results show that the dehydration reagent in the bubbling gas is the main dynamic force of dehydration reaction, and the OH groups are removed rather rapidly at the initial stage. Elevating temperature and increasing bubbling flux can conduce to the increase of dehydration efficiency. The rate of dehydration in the glass melt is affected by ' cage effect ' . The dehydration rate is controlled by the probability of forming encounter twins between OH and CCl4.