Y_2(CrO_4)_3均匀胶体粒子的制备及形貌控制

Preparation and Shape-Control of Yttrium Chromate Uniform Particle

在尿素的存在下通过共沉淀法由硝酸钇和重铬酸铵制备了不同形貌的Y2(CrO43)均匀胶体粒子.结合电镜照片,研究了一些实验条件对其形态和粒径大小的影响,并且明确了制备粒子的条件.结果表明:在适当的金属离子和尿素配比条件下,可以制得球形和立方体的Y2(CrO43)均匀胶体粒子.

Uniform particles of yttrium chromate with dissimilar morphology were prepared by homogeneous precipitation from yttrium nitrate and ammonium dichromate solutions in the presence of urea. The effect of various experimental parameters on the morphology and size of the resulting particles were studied by the TEM micrographs. The optimal conditions of preparation were confirmed. The results indicate that the spherical and cubical particles can be obtained in the appropriate ratio of metal ions and urea.