Preparation of large particle rare earth oxides by precipitation with oxalic acid

稀土学报(英文版), 2008, 26(2): 158-162.

^1, , ^2, , ^3, , ^4, , ^5,

1.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

2.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

3.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

4.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

5.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

基金项目: 国家重点基础研究发展计划(973计划)(NKBRP 2004CCA03900) 国家自然科学基金(50662002)

Preparation of large particle rare earth oxides by precipitation with oxalic acid

LIU Zhaogang ^1, , LI Mei ^2, , HU Yanhong ^3, , WANG Mitang ^4, , SHI Zhenxue ^5,

1.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

2.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

3.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

4.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

5.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

Keywords： large particle

The large particle CeO2 and Y2O3 were prepared using oxalic acid as precipitator. The effects of operational parameters such as stirring velocity, precipitation temperature, feeding speed, aging time, precipitation method, and calcination temperature on particle size and loose density of CeO2 were studied. Under the particular conditions, particle median size of D50≥30μm, loose density of ≥2.0 g/ml of CeO2, and particle median size of D50≥20 μm of Y2O3 were prepared. This technology had advantages of simple process, less equipment investment, ease of use, and suitability for industrialization products.

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