【作者】 王迪； 万松明； 张庆礼； 孙敦陆； 殷绍唐； 尤静林； 王媛媛；

【Author】 WANG Di;WAN Song-ming;ZHANG Qing-li;SUN Dun-lu;YIN Shao-tang;YOU Jing-lin;WANG Yuan-yuan;Anhui Provincial Key Laboratory of Photonic Devices and Materials,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;Shanghai Key Laboratory of Modern Metallurgy and Materials Processing,Shanghai University;

【机构】 中国科学院安徽光学精密机械研究所安徽省光子器件与材料重点实验室； 上海大学上海市现代冶金与材料制备重点实验室；

【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（?）（（?）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。更多还原

【Abstract】 Using the high micro-Raman spectroscopy,the micro-structures of nonlinear optical crystal LiB₃O₅ and its high temperature solution were studied.The high temperature Raman spectra of LiB₃O₅crystals,Raman spectra of lithium borate glasses Li₂O·4B₂O₃ at room temperature and its melt at high temperature were obtained.The analysis of these spectra indicates that the micro-structures of LiB₃O₅crystal and lithium borate glasses Li₂O·4B₂O₃ are mainly the six-number boroxol rings containing one B（?）4tetrahedron（（?） represents bridge oxygen）.With the temperature increasing,the stability of B（?）4 tetrahedron decreases and destroys,a conversion from 4-coordinated boron B（?）4 to 3-coordinated boron B（?）3 occurs.As a result,the six-number boroxol rings containing one B（?）4 are partly destroyed and the concentration of boroxol B₃（?）₆ in the high temperature solution increases.The structural characteristics of the high temperature Li₂O·4B₂O₃ solution are benefit for LiB₃O₅ crystal growth.更多还原