大尺寸硒铟锂单晶小角倾斜水平温梯冷凝法制备技术基础研究

项目名称： 大尺寸硒铟锂单晶小角倾斜水平温梯冷凝法制备技术基础研究

项目编号： No.51301055

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 代丽

作者单位： 哈尔滨理工大学

项目金额： 25万元

中文摘要： 硒铟锂(LiInSe2)晶体是重要的中红外非线性光学晶体,兼具优异的非线性光学和热力学性质,具有广阔的应用前景。但目前研究重点都集中理论计算,对其制备方法和工艺参数对晶体性能的影响等关键问题未见报道。申请人提出采用可视水平梯度冷凝法结合小角度倾斜方法生长LiInSe2晶体,确定生长出高质量、高性能的大尺寸晶体的最佳工艺参数。首先,采用化学腐蚀法,结合同步辐射和高分辨X射线研究晶体的微观缺陷。然后,通过电感耦合等离子体发射谱、X射线衍射光谱、红外透射光谱、拉曼光谱等手段研究晶体的成分、结构和光学性能,分析生长工艺对晶体成分的影响规律。本项目将给出一套制备大尺寸、高质量LiInSe2单晶的方法和最优工艺参数,同时,揭示"晶体生长工艺-晶体成分-缺陷结构-光学性能"的关系,为开发新型中远红外非线性光学晶体提供理论依据,具有较大的理论与实际意义。

中文关键词： 硒铟锂晶体；定向凝固；合成工艺；纤锌矿结构；

英文摘要： LiInSe2 crystal is one of the most important mid-infrared non-linear optical crystal. It has broad application perspective due to its excellent non-linear optical and thermodyanmic properties. However, current research is mainly focused on the theoretical calculations. The key problems, such as the effects of the synthesis method and the process parameters on the crystal performances, have not been reported yet. The applicant proposes to grow LiInSe2 single crystals by the combination of the visual horizontal gradient condensation method and small angle inclined method, and determine the optimal process parameters for the growth of large size crystals with high quality and high performance. Firstly, the micro defects of the crystal were analyzed by the chemical corrosion method combined with the synchrotron radiation and high resolution X-ray diffaction. Then by means of inductively coupled plasma atomic emission spectroscopy, X ray diffraction, Infrared spectoscopy and Raman spectroscopy, we determined the composition, structure and optical properties of the crystal, and analyzed the effects of the growth process on the composition of the crystal.This project will provide a set of method for the preparation of larger size high quality LiInSe2 single crystal and the optimal growth process parameters. In the me

英文关键词： LiInSe2 crystal；Directional solidification；Synthesis；Wurtzite；