稀土掺杂硼铝硅酸盐玻璃结构的NMR研究  

The NMR study of rare earth doped boro-alumino-silicate glasses

作　　者：陆春华[1] 倪亚茹[1] 崔运国[1] 许仲梓[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《光学技术》2006年第1期98-100,104,共4页Optical Technique

基　　金：江苏省自然科学基金项目资助(BT200412);江苏省高校自然科学基金项目资助(03kjb430046)

摘　　要：在Sm2O3掺杂BaO-B2O3-Al2O3-SiO2-Sm2O3(BBASS)玻璃系统的形成性能的研究基础上,借助MAS NMR以及差热测试技术,研究了玻璃的结构特点以及玻璃组成、热处理条件等因素对玻璃结构的影响。研究表明,在未掺稀土的BBAS玻璃结构中,硼氧多面体主要以[BO3]、[BO4]存在,铝氧多面体主要以[AlO4]、[AlO5]、[AlO6]存在;随着BBAS中BaO含量的增加,硼氧三角体[BO3]逐渐向[BO4]转变,铝氧多面体中的[AlO5]、[AlO6]结构单元逐渐向[AlO4]转变;稀土Sm3+具有较强迫积聚作用,能促使玻璃结构中的硼氧多面体形成巨大的网络结构;热处理对玻璃结构中硼氧多面体和铝氧多面体的配位结构影响不大。The characteristics of glass structure and some factors such as the component, the heat-treated conditions that affected the glass structure were studied, based on the research of the Sm2O3 doped BaO-B2O3-Al2O3-SiO2-Sm2O3（BBASS） systern glasses＇ forming performances, using MAS NMR spectroscopy and differential thermal analysis （DTA） testing technology. It was found that, in the structure of the BBAS glass without rare earth doped, the boron coordination were mainly of [BO3] and [BO4], the aluminum coordination were [AlO4], [AlO5] and [AlO6]. With the content of the BaO increasing in the BBAS glass, [BO3] graduated to [BO4], and the [AlO5] and [AlO6] changed to [AlO4] gradually. Sm3＋ could accumulate the boron network because of its high field strength, forming a large network structure. Heat-treatment had little or none effect on the boron and aluminum coordination in the glass structrure.

关 键 词：玻璃形成 玻璃结构 NMR 

分 类 号：TQ171[化学工程—玻璃工业]