Li2O-B2O3-Al2O3复合干凝胶的制备及其红外光谱研究

doi:10.3724/SP.J.1077.2010.00424

无机材料学报

Li₂O-B₂O₃-Al₂O₃复合干凝胶的制备及其红外光谱研究

李胜春^1,2, 李波¹, 漆小波¹, 韦建军²

1.中国工程物理研究院激光聚变研究中心,绵阳 621900; 2.四川大学原子与分子物理研究所, 成都 610065

收稿日期:2009-08-11 修回日期:2009-10-18 出版日期:2010-04-20 网络出版日期:2010-04-27

Preparation and IR Characterization of Li₂O-B₂O₃-Al₂O₃ Composite Xerogel

LI Sheng-Chun^1,2, LI Bo¹, QI Xiao-Bo¹, WEI Jian-Jun²

1. Research Center of Laser Fusion, CAEP, Mianyang 621900, China; 2. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

Received:2009-08-11 Revised:2009-10-18 Published:2010-04-20 Online:2010-04-27

摘要/Abstract

摘要： 以甲醇锂和金属醇盐为原料, 利用溶胶凝胶法制备了L₂O-B₂O₃-Al₂O₃三元复合干凝胶. 采用FTIR以及XRD对干凝胶结构随Al₂O₃含量和温度的变化进行了表征. 结果表明：在干凝胶中随着Al₂O₃含量的增加, 四配位态B原子的相对含量在降低, 处于非对称态的三配位B原子的相对含量在增加, 处于对称态的三配位B原子相对含量在降低, 三配位态B原子总的相对含量在增加. 含10mol%Al₂O₃的干凝胶经过550℃热处理1h, 其结构由非晶态转变为晶态, 主晶相是Li₂AlB₅O₁₀.

关键词: 溶胶凝胶法, 复合凝胶, 制备, 红外光谱

Abstract: Li₂O-B₂O₃-Al₂O₃ composite xerogels were successfully prepared from lithium methoxide, tri-nbutylborate and aluminum trisecbutoxide dissolved in methanol and tetrahydrofuran by SolGel method. The structure changes of xerogels upon increasing the Al
₂O₃ content and thermal treatment temperatures from 150℃ to 550℃ were characterized by FTIR and XRD. The results indicate that the relative content of BO₄ units shows a continuous decrease with increasing Al₂O₃ contents. Consequently, the concentration of asymmetric BO₃ units increase. The relative content of symmetric BO₃ units decrease. Total relative content of BO₃ units increase with the Al₂O₃content increasing. The structure of the xerogel containing 10 mol%Al₂O₃ after heattreatment at 550℃ for 1h transforms from glassy to crystalline. The main crystalline is Li₂AlB₅O₁₀.

Key words: Sol-Gel method, composite gel, preparation, IR

中图分类号:

TB321

李胜春,李波,漆小波,韦建军. Li₂O-B₂O₃-Al₂O₃复合干凝胶的制备及其红外光谱研究[J]. 无机材料学报, DOI: 10.3724/SP.J.1077.2010.00424.

LI Sheng-Chun,LI Bo,QI Xiao-Bo,WEI Jian-Jun. Preparation and IR Characterization of Li₂O-B₂O₃-Al₂O₃ Composite Xerogel[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2010.00424.

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Li₂O-B₂O₃-Al₂O₃复合干凝胶的制备及其红外光谱研究

Preparation and IR Characterization of Li₂O-B₂O₃-Al₂O₃ Composite Xerogel

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