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LiB3O5晶体及其自助溶生长溶液的高温拉曼光谱研究

, PP. 241-246

Keywords: 材料,LiB3O5晶体,助溶剂晶体生长,硼酸盐玻璃,高温拉曼光谱

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Abstract:

利用高温共焦激光显微拉曼光谱技术,研究了非线性光学晶体LiB3O5以及晶体自助溶生长溶液的高温微结构特征。通过对LiB3O5晶体高温拉曼光谱、Li2O?4B2O3组分玻璃体常温拉曼光谱和Li2O?4B2O3高温溶液拉曼光谱的分析表明晶体、玻璃体中主要的结构单元为包含一个B?4(?为桥氧)结构的硼氧六元环。随着温度的升高,该六元环中B?4结构稳定性降低,发生硼氧四配位B?4向三配位B?3的转变。从而造成包含一个B?4结构的硼氧六元环部分被破坏,Li2O?4B2O3高温溶液中硼氧六元环基团B3?6相对浓度增高。Li2O?4B2O3高温溶液这一微结构特征对形成LiB3O5晶体相是有利的。

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