| 超细氧化镧制备新方法 |
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| 引用本文： | 钟亮,郑雨文.超细氧化镧制备新方法[J].广东化工,2010,37(12):41-42. |
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| 作者姓名： | 钟亮 郑雨文 |
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| 作者单位： | 赣州虔东稀土集团股份有限公司,江西赣州341000 |
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| 摘 要： | 采用硝酸镧溶液与磷酸氢二铵溶液共沉淀制得LaPO4.1/2H2O胶体,再加入草酸溶液在一定条件下转化,得到草酸镧前驱体,经灼烧后制得La2O3粉末。研究结果表明,在选定条件下,制备出了D50小于1.0μm的超细La2O3粉末。在实验过程中发现,沉淀物料浓度、温度、加入速度、溶液pH,对最终产物D50均有一定影响,但共沉温度是影响最终产品D50的关键因素。
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| 关 键 词： | 稀土 氧化镧 超细 共沉淀 草酸转化 |
New Preparation Method of Superfine Lanthanum Oxide |
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| Zhong Liang,Zheng Yuwen.New Preparation Method of Superfine Lanthanum Oxide[J].Guangdong Chemical Industry,2010,37(12):41-42. |
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| Authors: | Zhong Liang Zheng Yuwen |
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| Affiliation: | (Ganzhou Qiandong Rare Earth Group Co., Ltd., Ganzhou 341000, China) |
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| Abstract: | By co-precipitation of diammonium hydrogen phosphate and lanthanum nitrate, the glue of LaPO4·l/2H2O was obtained. By adding oxalic acid solution to it, the lanthanum oxalate precursor was gotten. The precursor was turned to superfine Lanthanum oxide powder when it was calcined. The experimental conditions related to influencing the properties of a203 superfine powders （D50〈1.0/am）was studied. The test results showed that material density, temperature, feed speed and pH all took effects on D50 of La2O3, but the temperature of co-precipitation was the key aspect. |
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| Keywords: | rare earths lanthanum oxide superfine co-precipitation convertion of oxalic acid |
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