量子电子学报, 2011, 28 (2): 241, 网络出版: 2011-03-28
LiB3O5晶体及其自助溶生长溶液的高温拉曼光谱研究
Investigation on LiB3O5 crystal and its growing solutions using high temperature Raman spectroscopy
材料 LiB3 O5 晶体 助溶剂晶体生长 硼酸盐玻璃 高温拉曼光谱 materials LiB3 O5 crystal high temperature solution crystal growth lithium borate glasses high temperature Raman spectroscopy
摘要
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LiB3 O5 以及晶 体自助溶生长溶液的高温微结构特征。 通过对LiB3 O5 晶体高温拉曼光谱、Li2 O·4B2 O3 组分玻璃体常温拉曼光谱和Li2 O·4B2 O3 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(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向三配位B的转变。从而造成包含一个B结构的 硼氧六元环部分被破坏, Li2 O·4B2 O3 高温溶液中硼氧六元环基团B3 相对浓度增高。Li2 O·4B2 O3 高温溶液这一微结构特征对形成LiB3 O5 晶体相是有利的。
Abstract
Using the high micro-Raman spectroscopy, the micro-structures of nonlinear optical crystal LiB3 O5 and its high temperature solution were studied. The high temperature Raman spectra of LiB3 O5 crystals, Raman spectra of lithium borate glasses Li2 O·4B2 O3 at room temperature and its melt at high temperature were obtained. The analysis of these spectra indicates that the micro-structures of LiB3 O5 crystal and lithium borate glasses Li2 O·4B2 O3 are mainly the six-number boroxol rings containing one B tetrahedron (represents bridge oxygen). With the temperature increasing, the stability of B?4 tetrahedron decreases and destroys, a conversion from 4-coordinated boron B to 3-coordinated boron B occurs. As a result, the six-number boroxol rings containing one B are partly destroyed and the concentration of boroxol B3 in the high temperature solution increases. The structural characteristics of the high temperature Li2 O·4B2 O3 solution are benefit for LiB3 O5 crystal growth.
王迪, 万松明, 张庆礼, 孙敦陆, 殷绍唐, 尤静林, 王媛媛. LiB3O5晶体及其自助溶生长溶液的高温拉曼光谱研究[J]. 量子电子学报, 2011, 28(2): 241. WANG Di, WAN Song-ming, ZHANG Qing-li, SUN Dun-lu, YIN Shao-tang, YOU Jing-lin, WANG Yuan-yuan. Investigation on LiB3O5 crystal and its growing solutions using high temperature Raman spectroscopy[J]. Chinese Journal of Quantum Electronics, 2011, 28(2): 241.