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

doi:10.3724/SP.J.1077.2010.00424

Abstract

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

CLC Number:

TB321

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.

References

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

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