LED用碱金属碱土金属硼酸盐荧光粉的制备及其热力学性质研究

项目名称： LED用碱金属碱土金属硼酸盐荧光粉的制备及其热力学性质研究

项目编号： No.21503044

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 黄宏升

作者单位： 贵州理工学院

项目金额： 22万元

中文摘要： 针对当前LED用碱金属碱土金属硼酸盐基质荧光粉的制备工艺单一、组成与结构可控研究少和热力学性质尚未开展研究的现状，本项目拟开展稀土（Eu3+）掺杂碱金属碱土金属硼酸盐荧光粉的制备和热力学性质研究。本项目采用湿化学法分两步进行产品制备研究，先制备水合稀土（Eu3+）掺杂碱金属碱土金属硼酸盐（前躯体），后将前躯体热处理的方法来制备目标产品。主要利用量热法对前躯体和不同热处理条件下产品的热力学性质进行研究，并结合它们的组成、结构，研究前躯体结构、组成和热处理条件对产品组成、结构的影响规律及机理，研究前躯体和热处理产品的组成、结构与其热力学性质的关系及规律，并在此基础上，对前躯体和热处理后产品的合成工艺、条件进行热力学预测和实验验证，最终建立利用湿化学法合成系列产品的合成工艺、条件的热力学预测方法，为特定组成、结构的稀土掺杂碱金属碱土金属硼酸盐荧光粉的可控合成提供科学指导。

中文关键词： 发光二极管；硼酸盐；；；荧光粉；；热力学；量热

英文摘要： Because the preparation process of alkali and alkaline earth borate phosphor for LED was simple,the control lab preparation study on the product`composition and structure was few and there were no reports on their thermodynamic properties, this project intends to do the synthesis and thermodynamic studies of the rare earth (Eu3+) doped alkali and alkaline earth borate phosphor. There are two preparation steps, the hydrated rare earth (Eu3 +) doped alkali and alkaline earth borates (precursor) were prepared by wet chemical method firstly, then the final products were obtained by heat the precursors. The thermodynamic properties of precursors and final products were studied by calorimetric method. Combined their thermodynamic properties with their composition and structure, the influence of precursor' structure, composition and heat treatment conditions on the products' composition, structure were studied and obtained. In addition, the relationship between the precursors and final products' structure and their thermodynamic properties were obtained. On the basis of obtained influence rules and mechanisms, the preparation process and preparation condition of precursor and heat treated products were predicted by thermodynamic method, and the predicted results were validated by experiment. Finally, the thermodynamic prediction method for the preparation process of this kind phosphors were established. The research results will provide scientific guidance and reference for the controlled synthesis of rare earth (Eu3+) doped alkali and alkaline earth borate phosphors with specific composite and structure.

英文关键词： LED ;Borate ; Phosphor ;Thermodynamic;Calorimetry