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金属学报  1986, Vol. 22 Issue (4): 77-79    
  论文 本期目录 | 过刊浏览 |
Ce_2O_3-CaO-CaF_2三元渣系中Ce_2O_3的活度研究
王常珍;叶树青;胡应年;杜奇圣
东北工学院;东北工学院;内蒙古金属材料研究所;内蒙古金属材料研究所
ACTIVITY OF Ce_2O_3 IN LIQUID SLAGS OF Ce_2O_3-CaO-CaF_2 SYSTEM
by WANG Changzhen; YE Shuqing (Northeast Institute of Technology; Shenyang); HU Yingnian; DU Qisheng (Nei Monggol Institute of Metallic Materials)
引用本文:

王常珍;叶树青;胡应年;杜奇圣. Ce_2O_3-CaO-CaF_2三元渣系中Ce_2O_3的活度研究[J]. 金属学报, 1986, 22(4): 77-79.
, , , . ACTIVITY OF Ce_2O_3 IN LIQUID SLAGS OF Ce_2O_3-CaO-CaF_2 SYSTEM[J]. Acta Metall Sin, 1986, 22(4): 77-79.

全文: PDF(217 KB)  
摘要: <正> 本文在确定1600℃时CeO_2-CaO-CaF_2和Ce_2O_3-CaO-CaF_2渣系熔化范围的基础上,采用化学平衡法研究渣中稀土氧化物的活度,并绘制等活度线,为选择合理的电渣重熔渣系组成提供理论依据。 根据CeO_2在高温低氧分压情况下转变为Ce_2O_3的特性,实验所依据的反应为 (Ce_2O_3)+3C_(石墨)=2[Ce]_(Sn)+3CO 以固态Ce_2O_3和液态Ce作为标准态,炉渣中Ce_2O_3活度的计算公式为 αCe_2O_3=[N_(Ce)]~2/[N_(Ce)~0]~2 式中N_(Ce)和N_(Ce)~0分别为与某个组成的渣和与固相Ce_2O_3平衡的Sn中的Ce含量。文中并对在高温低氧情况下CeO_2向Ce_2O_3的转变问题进行了热力学分析。
Abstract:The liquid boundary of the slags of Ce_2O_3-CaO-CaF_2 system and the iso-activity lines for Ce_2O_3 and CeO_2 are given from experimental determination of the activity of Ce_2O_3 by equilibrating the slag with Sn in a graphite crucible under an atmosphere of CO at 1600℃. The activity of Ce_2O_3 in the slags containing certain CeO_2 or CaO, increases with the increase of concentration of CaO or CeO_2 respectively. The transition of CeO_2 to Ce_2O_3 under the condition of high temperature and low oxygen partial pressure was also discussed by thermodynamical analysis.
收稿日期: 1986-04-18     
1 邹元燨;赵彭年;曹兆民,金属学报,6(1963) ,121.
2 Chou Yuan-hsi(邹元燨),Chow Ji-cheng(周继程);Chao Peng-nian(赵彭年),Sci.Sinica,12 (1963) .1249.
3 王常珍,邹元燨,金属学报,16(1980) ,190.
4 王常珍,杨代银,金属学报,15(1979) .433.
5 Iwasaki, B.; Katsura, T., Bull. Chem. Soc. Jpn., 44 (1971) , 1297.
6 Bevan, D.J.; Kordis, J., J.Inorg. Nucl. Chem., 26 (1964) , 1509.
7 Fruehan, R.J., Metall, Trans., 10B (1979) , 143.
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