(1. 湖南大學(xué) 化學(xué)化工學(xué)院，長沙 410082；
2. 湖南有色冶金勞動保護研究院，長沙 410014)
摘 要: 以氨水或碳酸銨為沉淀劑，采用共沉淀-水熱合成法制備稀土摻雜鋁酸鍶發(fā)光納米材料，并優(yōu)化制備稀土摻雜鋁酸鍶發(fā)光材料的工藝條件。對激活劑、助激活劑、助熔劑的用量、體系的酸堿度和灼燒溫度對目標(biāo)產(chǎn)物發(fā)光性能的影響規(guī)律進行研究。結(jié)果表明：目標(biāo)產(chǎn)物Sr2Al14O25:Eu2+,Dy3+屬正交晶系，為藍綠色長余輝納米材料，主激發(fā)峰均在360 nm左右；氨水共沉淀法制備的產(chǎn)物主發(fā)射峰在490 nm, 磷光衰減壽命約30 s；碳酸銨沉淀法制備的產(chǎn)物主發(fā)射峰在460 nm, 磷光衰減壽命約15 s。
關(guān)鍵字: Sr2Al14O25:Eu2+,Dy3+；共沉淀-水熱合成；長余輝；發(fā)光性能
（1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;
2. Hunan Labor Protection Institute of Nonferrous Metals, Changsha 410014, China）
Abstract:Europium and dysprosium co-doped strontium aluminate nanomaterials were prepared by co-precipitation hydrothermal method using ammonia and ammonium carbonate as precipitating agent, and the optimal conditions were determined. The influences, such as the amount of the activator, co-activator, flux, calcined temperature and pH, of the system on the luminescence properties of the products were investigated. The results show that the compound Sr2Al14O25:Eu2+,Dy3+ is orthorhombic aquamarine blue long afterglow nanomaterials, the main excitation peak is around 360 nm, the main emission peak of the phosphors obtained using ammonia as precipitation agent is around 490 nm, with the phosphorescence decay lifetime of 30 s, the main emission peak of the products with ammonium carbonate as precipitation agent is around 460 nm, and its phosphorescence decay lifetime is 15 s. The target products with good long afterglow properties are hopeful to be applied in coating, ceramics, photonic devices and other related fields.
Key words: Sr2Al14O25:Eu2+,Dy3+; coprecipitation-hydrothermal method; long afterglow; luminescence properties
