Preparation of large particle rare earth oxides by precipitation with oxalic acid
来源期刊：JOURNAL OF RARE EARTHS2008年第2期
论文作者：WANG Mitang LI Mei SHI Zhenxue LIU Zhaogang HU Yanhong
Key words：large particle; oxalate; loose density; rare earths;
Abstract: 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.
WANG Mitang1，LI Mei1，SHI Zhenxue1，LIU Zhaogang1，HU Yanhong1
(1.School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China)
Abstract: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.
Key words:large particle; oxalate; loose density; rare earths;
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