以Sr2+, Y3+和Eu3+的混合硝酸盐溶液为阳离子溶液, 以(NH4)2CO3为沉淀剂, 共沉淀法制备了碳酸盐前驱体, TG-DSC分析结果表明, 随着(NH4)2CO3浓度的升高, 前驱体组成由碱式碳酸盐向正盐转变. 以CS2为硫化剂, 高温煅烧前驱体合成了SrY2S4:Eu2+红色荧光粉. XRD表明前驱体经800 ℃处理得到纯相SrY2S4. 荧光光谱和SEM研究表明在[Sr(NO3)2+Eu(NO3)3]:[Y(NO3)3]:[(NH4)2CO3]=0.25:0.50:2.00(摩尔比)条件下制备前驱体, 然后1050 ℃煅烧4 h所得荧光粉的发光强度最大, 粒径小于1 μm, 粒子形貌呈椭球. Eu2+在SrY2S4基质中的最佳掺杂摩尔分数是0.6%.
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