金属学报  1979, Vol. 15 Issue (1): 51-57

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稀土渣中氧化镧活度的测定

洪彦若;白江添

DETERMINATION OF THE ACTIVITY OF LANTHANUM OXIDE IN ESR SLAGS

Hong Yanruo;Bai Jiangtian

洪彦若;白江添. 稀土渣中氧化镧活度的测定[J]. 金属学报, 1979, 15(1): 51-57.
, . DETERMINATION OF THE ACTIVITY OF LANTHANUM OXIDE IN ESR SLAGS[J]. Acta Metall Sin, 1979, 15(1): 51-57.

摘要 参考文献 相关文章 Metrics 全文: PDF(450 KB)   摘要: 介绍了化学平衡法测量La_2O_3活度的原理、方法和设备并测量了以CaF_2为基的电渣炉渣的La_2O_2活度及CaO,MgO和Al_2O_3,对La_2O_3活度的影响。结果表明,在La_2O_3-CaF_2二元系中,aLa_2O_3随La_2O_3浓度而迅速提高’其定量关系为aLa_2O_3=N_(La_2O_3)~1.59),即CaF_2是降低γ_(La_2O_3的物质。在多元系中,CaO,MgO是增加γLa_2O_3的物质,但由于CaO的碱度较强,其对aLa_2O_3的影响也较明显。Al_2O_3则使γLa_2O_3降低,含量超过5％影响更强烈。在假定CaF_2,CaO,MgO等对aLa_2O_3的影响不产生交互作用时,得出La_2O_3活度的普遍近似计算式。 Abstract：A chemical equilibrium method has been used to determine the activity ofLa_2O_3 in CaF_2-base ESR slags and the effect of CaO, MgO and Al_2O_3 has beenstudied. It is shown that the activity of La_2O_3 (α_(La_2O_3)) increases rapidly with itsconcentration in the binary system La_2O_3-CaF_2 as represented by α_(La_2O_3)=N_(La_2O_3)~(1.59).Expressions of α_(La_2O_3) in slags containing CaO and MgO are: α_(La_2O_3(30%La_2O_3))=0. 0219+0. 0651N_(CaO) α_(La_2O_3(30%La_2O_3,10%CaO))=0. 0331+0. 0365N_(MgO)~(1.4)Thus, either CaO or MgO increases γ_(La_2O_3) and the effect of CaO is more mark-ed owing to its greater basicity. On the other hand, Al_2O_2 was found to lowerγ_(La_2O_3), especially when its content was in excess of 5%. Assuming that interactionbetween CaF_2, CaO and MgO when they coexisted would not alter the individualeffects upon α_(La_2O_3) as shown above, equations of more general applications maybe put forward for approximate calculations of α_(La_2O_3) in such ESR slags. 收稿日期: 1979-01-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 洪彦若 白江添 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1979/V15/I1/51 [1] 北京钢丝厂,北京钢铁学院物理化学教研室,稀土渣的性质及在电热合金中的应用,1978年2月. [2] 王常珍,邹元燨,液态La_2O_3-CaF_2和La_2O_3-CaF_2-CaO-SiO_2渣中La_2O_3的活度, 1964年10月. No related articles found! Viewed Full text Abstract Cited   Shared      Discussed