Production of Phosphor (YAG : Tb) particles by Supercritical Water Crystallization Method

超临界水结晶法生产荧光粉（YAG：Tb）颗粒

基本信息

批准号：
08555184
负责人：
ARAI Kunio
金额：
$ 9.73万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555184/
关键词：
Phosphor Supercritical Water YAG : Tb Hydrothermal Synthesis Emission property 蛍光体 YAG : Tb 熱分析反応晶析

项目摘要

The objective of this research was to develop a repid and continuous production process for phosphor (YAG : Tb) fine particles by supercritical water crystallization method. The relationship between properties (crystal sturacture, particle size and particle size distribution) of particles produced and reaction conditions (reaction temperature, pressure, reaction time, composition of solution and alkali mole ration of solution) was investigated experimentally. Al (NO_3) _3, Y (NO_3) _3 and TbCl_3 mixed aqueous solution was used as the starting materials. Potassium aqueous solution was used to vary the alkali mole retio of solution. Experiments were performed with a newly-deveolped flow type apparatus. From these results, the alkali mole ratio was important factor for production of single phase YAG particles. Reaction temperature and pressure affected crystalline size and lattice constant of particles. High temperature and low pressure leaded to produce particles with high crystallinity. Emission properties of particles produced was studied by comparison with particles produced by a conventional solid state reaction method. Properties of particles produced by the method in this work were comparable with the conventional method. Continuous (1.5g/h) and rapid (<1 sec.) production of phosphor (YAG : Tb) fine particles was found to be practical with the supercritical water crystallization method.

这项研究的目的是通过超临界水结晶法开发磷光器（YAG：TB）细颗粒的持续生产过程。通过实验研究了产生的颗粒的特性（晶体坚固，粒度和粒度分布）和反应条件（反应温度，压力，反应时间，溶液的组成和溶液的碱分析）之间的关系。 Al（NO_3）_3，Y（NO_3）_3和TBCL_3混合水溶液用作起始材料。钾水溶液用于改变溶液的碱性元素。用新的洗涤型流动型设备进行实验。从这些结果中，碱摩尔比是产生单相YAG颗粒的重要因素。反应温度和压力影响颗粒的结晶尺寸和晶格常数。高温和低压导致产生具有高结晶度的颗粒。通过与传统固态反应方法产生的颗粒进行比较研究了产生的颗粒的发射特性。该方法中该方法产生的颗粒的性质与常规方法相当。通过超临界水结晶法，发现连续（1.5g/h）和快速（<1秒）生产磷光器（YAG：TB）细颗粒是实用的。