钠硼硅酸盐玻璃分相过程的NMR研究

无机材料学报

钠硼硅酸盐玻璃分相过程的NMR研究

任海兰; 岳勇; 叶朝辉; 袁启华⁺

中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室; 武汉 430071; 武汉工业大学新材料研究所, 武汉 430070

收稿日期:1997-03-31 修回日期:1997-05-05 出版日期:1998-06-20 网络出版日期:1998-06-20

Process of Phase Separation in Sodium Borosilicate Glass as Studied by NMR

REN Hai-Lan; YUE Yong; YE Chao-Hui; YANG Qi-Hua⁺

Laboratory of Nuclear Magnetic Resonance and Atomic and Molecular Physics; Wuhan Institute ofPhysics and Mathematics; Chinese Academy of Sciences Wuhan 450071 China; ⁺Advanced Materials Institute; Wuhan University of Technology Wuhan 430070 China

Received:1997-03-31 Revised:1997-05-05 Published:1998-06-20 Online:1998-06-20

摘要/Abstract

摘要： 利用²⁹Si、¹¹B、²³Na MAS NMR，研究了一定组成的Na₂O－B₂O₃－SiO₂玻璃在不同温度下其微结构随分相处理时间的变化．结果表明，随分相过程的进行，[SiO₄]结构单元的非桥氧之间逐渐脱氧，聚集程度逐渐提高，富硅相中的[BO₃]结构与氧结合转变为[BO₄]结构并进入富钠硼相，两相成分差逐渐增大，分相是扩散传质的结果．在较高的分相温度下，玻璃结构调整较快，因而更早地接近分相的平衡态．

关键词: 钠硼硅酸盐, 分相, NMR

Abstract: ²⁹Si, ¹¹B, ²³Na MAS NMR were employed to study the structure change of the Na₂O-B₂O₃-SiO₂ glass in the process of
thermal treatment of phase separation. The results show that oxygen atoms are deleted among the [SiO₄] structure units and the aggregation degree of Si
increases in the process of phase separation. In the meantime, the structure of boron atoms in silicon-rich phase is transformed gradually from [BO₃] to
[BO₄] and [BO₄] units enter into sodium-boron rich phase. The difference between the compositions of the two phases gradually increases. The phase separation
is the result of diffusion and mass transfer. Moreover, the glass has a more rapid structure adjustment rate at a higher temperature of thermal treatment,
thus can get to the equilibrium state faster.

Key words: sodium borosilicate, phase separation, NMR

中图分类号:

TQ171

任海兰,岳勇,叶朝辉,袁启华. 钠硼硅酸盐玻璃分相过程的NMR研究[J]. 无机材料学报.

REN Hai-Lan,YUE Yong,YE Chao-Hui,YANG Qi-Hua. Process of Phase Separation in Sodium Borosilicate Glass as Studied by NMR[J]. Journal of Inorganic Materials.

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