稀土掺杂硼铝硅酸盐玻璃结构的NMR研究

波谱学杂志 ›› 2005, Vol. 22 ›› Issue (3): 261-267.

稀土掺杂硼铝硅酸盐玻璃结构的NMR研究

南京工业大学材料科学与工程学院，江苏南京 210009

收稿日期:2005-03-04 修回日期:2005-05-15 出版日期:2005-09-05 发布日期:2005-09-05
基金资助:
江苏省自然科学基金资助项目(BT2004121)；江苏省高校自然科学基金项目资助(03kjb430046)；教育部跨世纪优秀人才资助项目.

Rare Earth Doped Boroaluminosilicate Glass Studied by Magic Angle Spinning Solid State NMR Spectroscopy

College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China

Received:2005-03-04 Revised:2005-05-15 Online:2005-09-05 Published:2005-09-05
Supported by:
江苏省自然科学基金资助项目(BT2004121)；江苏省高校自然科学基金项目资助(03kjb430046)；教育部跨世纪优秀人才资助项目.

摘要/Abstract

摘要：

在Sm₂O₃掺杂BaO-B₂O₃-Al₂O_3-SiO_2-Sm₂O₃(BBASS)玻璃系统的形成性能研究的基础上，借助MAS NMR以及差热测试(DTA)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，原先[AlO₄]、[AlO₅]、[AlO₆]共存的铝氧多面体结构逐渐转变为大量[AlO₄]和少量[AlO₅]共存的结构；稀土Sm³⁺具有较强的积聚作用，其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.

关键词: NMR, 稀土, 玻璃形成, 玻璃结构

Abstract:

Forming performances of Sm\-2O\-3 doped BaO-B₂O₃-Al₂O₃-SiO₂-Sm₂O₃ (BBASS) glass systems have been assessed in previous studies. In this study, magic angle spinning (MAS) NMR spectroscopy and differential thermal analysis (DTA) test were employed to characterize glass structure and to study the factors affecting glass structure, such as glass composition and conditions for heat-treatment, in such glass systems. In BBAS glass without rare earth doping, the boron coordination were mainly [BO₃] and [BO₄] and the aluminum coordination were mainly[AlO₄], [AlO₅] and [AlO₆]. It was found that, with the increase of BaO content in the BBAS glass, [BO₃] gradually became [BO₄], and [AlO₅]/[AlO₆] gradually changed to [AlO₄]. Sm³⁺ could accumulate in the glass with large amount, facilitating [BO₄] to form a large network. It was also found that heat-treatment had little or no effect on the boron and aluminum coordination in the glass structure.

Key words: NMR, rare earth, glass forming, glass structure, magic angle spinning

中图分类号:

TQ171

陆春华, 倪亚茹, 许仲梓. 稀土掺杂硼铝硅酸盐玻璃结构的NMR研究[J]. 波谱学杂志, 2005, 22(3): 261-267.

LU Chun-Hua, NI YA-Ru, HU Zhong-Zi. Rare Earth Doped Boroaluminosilicate Glass Studied by Magic Angle Spinning Solid State NMR Spectroscopy[J]. Chinese Journal of Magnetic Resonance, 2005, 22(3): 261-267.

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