摘要
采用化学其沉淀法合成Y3Al5O12：Ce^3＋荧光粉，利用DTA—TGA和荧光光谱研究沉淀剂、煅烧温度和时间等因素对荧光粉性能的影响。结果表明，以NH4HCO3 1mol．L^－1＋NH3．H2O4mol．L^-1缓冲溶液作为沉淀剂较佳，900℃煅烧时可形成荧光粉；468nm激发下荧光粉最强发射峰为532nm；煅烧温度和恒温时间对荧光粉的发光影响很大，在一定范围内，荧光粉峰值发射强度随煅烧温度和恒温时间的增加而增强，煅烧温度以不超过1200℃为宜，恒温时间以不超过3hr为宜。
Y3AI2O12：Ce3＋ phosphors ware synthesized by coprecipitation method. The influence factors of the synthesis process of the phosphors were investigated by DTA-TGA, Excitation Spectra and Emission Spectra. The result shows that proper precipitating agent and parameters of temperature and time play an important role in enhancing emission intensity of phosphor. Optimized precipitant is NH4HCO3（1mol.L-1） ＋ NH3.H2O（4mol.L-1）. The completely crystallized phosphor is obtained at about 900 ℃, and the emission spectrum excited by 468 nm shows a characteristic wide band with the peak at about 532 nm. The emission intensities increase with the increasing of firing temperature and firing time to some extent.
基金
本文得到重庆市自然科学基金（项目编号：2005BA4016）和国家自然科学基金（项目编号：10476035）资助.
