| 超微粒La2O3的制备与形态研究 |
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| 引用本文： | 谢慈仪,李声泽.超微粒La2O3的制备与形态研究[J].西南师范大学学报(自然科学版),1993,18(3):320-325. |
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| 作者姓名： | 谢慈仪 李声泽 |
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| 作者单位： | 西南师范大学高新科技研究所 重庆630715
(谢慈仪，李声泽)，西南师范大学高新科技研究所 重庆630715(李健) |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 采用均匀沉淀法,用尿素为水解剂,60～90℃,0.005mol·L~(-1)≤C(La~(3+))≤0.025mol·L~(-1),0.27mol·L~(-1)≤C(urca)≤0.81mol·L~(-1),用La(NO_3)_3溶液备了La(Ⅲ)的超微粒化合物,所得沉淀为LaOHCO_3,具有与CaCO_3超微粒相似的结晶形态,粒径≤0.02μm.将此超微粒前驱体置于高温沪中,1200℃烧1h后,得到La_2O_3超微粒,粒径≤0.04μm.
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| 关 键 词： | 尿素 均匀沉淀法 超微粒 氧化镧 |
THE PREPARATION OF La2O3 ULTRAFINE PARTICLES AND THEIR MORPHOGY STUDY |
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| Xie Ciyi Li Shengze Li Jian.THE PREPARATION OF La2O3 ULTRAFINE PARTICLES AND THEIR MORPHOGY STUDY[J].Journal of Southwest China Normal University(Natural Science),1993,18(3):320-325. |
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| Authors: | Xie Ciyi Li Shengze Li Jian |
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| Abstract: | By means of the homogeneous precipitation and with urea as the hydrolytic agent (at 60-90 C . 0. OOSmol L-'< La3+] initial <0. 025 mol L->, 0. 27 mol L-'< urea] initial <0. 81 mol L-', the La ( H ) ultrafine particle compound from La(NO3)3 solution was prepared. The precipitates obtained are LaOHCO3, whose size is less than 0. 02 Mm in diam and whose crystal pattern is similar to that of CaCOs ultrafine particales. The La2O3 ultrafine particles with the size of less than 0. 04 |am in diam. Can be obtained by means of calcining the ultrafine particle precursors at 1200 C in the high-temperature stove for an hour. |
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| Keywords: | urea homogeneous precipitation ullrafines of lanthanum preparation |
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