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本文主要讨论了三硼酸锂（ＬＢＯ）晶体的一种特殊缺陷，溶剂包藏所产生的散射颗粒。它严重影响着晶体的光学质量。我们通过晶体生长溶液体系的探索研究，终于找到了解决问题的办法。三硼酸锂（ＬｉＢ３Ｏ５）简称（ＬＢＯ）晶体是近几年来福建结物质结构研究所对硼酸盐系列化合物的研究和筛选中发现的一种紫外倍频材料，由于它的透光波段宽，抗激光损伤阈值高等特点，越来越受到人们的重视。通过结构分析可以看出，晶体结构中存在着（Ｂ３Ｏ７）硼氧环阴离子基因，Ｌｉ离子分布在基团骨架间隙中，这些Ｂ３Ｏ７，基团相互联接，沿ｃ轴方向形成螺旋结构，每个螺旋结构又通过硼氧桥相互联接。由于该晶体的硼化物坚固的Ｏ－Ｂ－Ｏ键链所形成的三维网络结构。晶体生长溶液具有很高的粘滞性。晶体在生长中边界层厚度较大，溶质输运不畅，严重影响溶质集团的有序生长排列。如果按常规参照Ｓａｓｔｒｙ发表的相图按ＬＢＯ∶Ｂ２Ｏ３＝２ｍｏｌ％∶１ｍｏｌ％比例生长晶体是很难克服晶体生长过程中“溶剂包藏”这一问题的。经过长时间生长研究发现，ＳａｓｔｒｙＬＢＯ相图中的个别相变点与实验情况是不相符合的。为了尽量降低溶液粘度同时又要遵循相图避免发生别的相变化，一般都采用ＬＢＯ∶Ｂ２Ｏ３＝２∶?
This paper mainly discusses a special defect of lithium borohydride (LBO) crystal and the scattering particles produced by solvent occlusion. It seriously affects the optical quality of the crystal. We through the crystal growth solution system of exploration and study, and finally found a solution to the problem. Lithium triborate (LiB3O5) abbreviation (LBO) crystal is a kind of ultraviolet frequency multiplication material found in the research and screening of borate series compounds in Fujian Institute of Matter Structure in recent years. Because of its wide transmission band, Laser damage threshold higher characteristics, more and more people’s attention. It can be seen from the structural analysis that the (B3O7) boranthoxy anion gene exists in the crystal structure and the Li ions are distributed in the interstitial skeleton of the group. These B3O7 groups are connected to each other to form a helical structure along the c-axis. Each helix The structure is connected to each other through a boron-oxygen bridge. The three-dimensional network structure formed by the boronate solid O-B-O bond chains of the crystal. Crystal growth solution with high viscosity. The growth of the crystal boundary layer thicker, solute transport is poor, seriously affecting the orderly growth of solute clusters. It is difficult to overcome the problem of “solvent occlusion” during the growth of crystals, according to the conventional reference of the phase diagram published by Sastry in terms of crystal growth ratio of LBO: B2O3 = 2mol%: 1mol%. After a long period of growth, it was found that the individual phase transition points in SastryLBO phase diagram did not agree with the experimental conditions. In order to minimize the solution viscosity but also to follow the phase diagram to avoid other phase changes, the general use of LBO: B2O3 = 2:?