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2010 , Vol. 25 >Issue 4: 424 - 428

DOI: https://doi.org/10.3724/SP.J.1077.2010.00424

研究论文

Li2O-B2O3-Al2O3复合干凝胶的制备及其红外光谱研究

  • 李胜春 ,
  • 李 波 ,
  • 漆小波 ,
  • 韦建军
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  • 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

  网络出版日期: 2010-04-27

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

  • LI Sheng-Chun ,
  • LI Bo ,
  • QI Xiao-Bo ,
  • WEI Jian-Jun
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  • 1. Research Center of Laser Fusion, CAEP, Mianyang 621900, China; 2. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China

Received date: 2009-08-11

  Revised date: 2009-10-18

  Online published: 2010-04-27

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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

本文引用格式

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, 2010 , 25(4) : 424 -428 . DOI: 10.3724/SP.J.1077.2010.00424

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 Al2O3 content 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

参考文献

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