【摘要】 采用超声雾化共沉淀法,以Al(NO3).9H2O,Y(NO3).6H2O为原料,以聚乙二醇(PEG2000)作为分散剂,利用超声技术雾化钇铝混合液,形成气溶胶,与沉淀剂(氨水、碳酸氢铵)共沉淀反应制备纳米YAG粉体,制得粉体900、1000℃下煅烧3h,用XRD、SEM进行性能表征。结果表明:粉体均一转相;颗粒细小,平均尺寸为50nm;分散均匀,无明显硬团聚。更多还原

【Abstract】 Al(NO3)3.9H2O, Y(NO3)3.6H2O was used as the raw materials, ammonia and ammonium hydrogen carbonate the precipitants, and PEG the dispersant. Ultrasonic spray co-precipitation method was used to synthesize the YAG nano-powders which includes aerosol formation ultrasonically from yttrium and aluminum mixture with dispersant and co-precipitation process. After calcined at different temperatures such as 900℃ or 1000℃ for 3h, the detailed phase and structural analyses of the powder precursors were carried out by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). The result shows that amorphous precursor calcined with high metal ions concentration could be converted to crystalline homogeneously; the YAG particles is small and the average size is about 50 nm; the particles are well-dispersed without serious agglomeration.更多还原