尿素均相沉淀法制备超细CeO_2的研究

Preparation of the Ultra-fine CeO_2 Powder by Homogenous Precipitation

以Ce(NO_3)_3·6H_2O和尿素为原料,采用均相沉淀方法制备CeO_2前驱体经灼烧获得了超细CeO_2粉体。前驱体经灼烧分解形成CeO_2的过程中,在形貌和尺寸上具有遗传性,可通过控制反应条件来控制所制备的前驱体的形貌及大小控制所制备的粉体的形貌及大小。制备了球形,粒径在200纳米左右,尺寸均一,分散性好的CeO_2粉体。

Homogenous precipitation and subsequent calcination has been used to synthesize ultra fine ceria powder from cerium nitrate and urea solution. The calcined ceria powder inherit the size and morphology of the precursor, which were closely related to the preparation process. So it is possible to get proper powder with expected size morphology by controlling the reaction conditions. This paper reported the preparation of monodispersed spheric particles with a size of about 200nm.