采用湿固相机械化学法制备稀土铝酸盐蓝色荧光粉前驱体,用XRD和DTA-TG分析技术研究了湿固相球磨过程和后续煅烧过程中的物相转变.结果表明:在球磨过程中反应原料经历了无定型化与水热结晶两个主要阶段,观察到了MgAl2O4尖晶石结构相的形成和BaMg(CO3)2及BaCO3的再结晶现象,这些晶相在640℃之前仍保持稳定.在烧成过程,首先发生无定型Al(OH)3的分解,而后是分两个阶段的BaMg(CO3)2和BaCO3分解过程.到900℃时,碳酸盐的分解才基本结束,但没有形成高温固相反应所得到的BaMgAl10O16晶相.扫描电镜观察和粒度分析结果表明所得前驱体为粒度1～3μm,分散性良好的亚球形蓝色荧光粉前驱体.
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