【摘要】 以Al(NO3)3.9H2O和Y(NO3)3.6H2O为原料,NH4HCO3为沉淀剂,十二烷基苯磺酸(C18H30SO3)为分散剂,采用一步共沉淀法合成钇铝石榴石(Y3Al5O12,YAG)纳米粉体。利用X射线衍射仪、Fourier红外光谱仪、同步热分析仪和场发射扫描电子显微镜对YAG前驱体及不同温度煅烧后的粉体进行表征。结果表明:YAG前驱体化学组成为10[Al(OH)3].3[Y2(CO3)3.3H2O],900℃煅烧2 h后转变为纯YAG相,1 000℃煅烧2 h后得到的粉体晶型完整、分散性好、颗粒尺寸分布均匀,形状近似球形,平均粒径约为65nm。该方法较传统共沉淀法操作步骤简化、参量减少、可重复性提高,因此,更有利于实现工业化批量生产。更多还原

【Abstract】 Yttrium aluminum garnet(Y3Al5O12,YAG) nano-powders were prepared by single step co-precipitation method using Al(NO3)3?9H2O and Y(NO3)3?6H2O as raw materials,NH4HCO3 as precipitator,and dodecylbenzene sulfonic acid(C18H30SO3) as dispersion medium.The precursor and calcined nano-powders were characterized by X-ray diffractometer,Fourier transform infrared spectroscopy、thermogravimetry and differential thermal analysis and field emission scanning electron microscope.The result showed that the chemical composition of the precursor was 10[Al(OH)3]?3[Y2(CO3)3?3H2O] and it was transformed into the pure YAG phase after calcined at 900 ℃ for 2 h.The pure cubic YAG powder with average particle size of about 65 nm,complete crystal shape,good dispersion,uniform size distribution and spherical shape was obtained by calcining the precursor at 1 000 ℃ for 2 h.In comparison with the traditional co-precipitation method,this modified method can simplify the experimental operation and re-duces the control parameters to improve the repeatability of experiment.So it is more advantageous to realize the industrialization production.更多还原