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金属钆中钨的演化迁移行为与调控 被引量:2

Evolution Migration Behavior and Regulation of Tungsten in Metallic Gadolinium
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摘要 以氟化钆为原料,金属钙为还原剂,在真空感应炉内,用钙热还原和XRD法研究了金属钆中钨的来源、形态、分布、演化迁移行为和调控方法。结果表明,金属钆中钨主要来源于坩埚,以熔解态钨和夹杂物Gd_2(WO_4)_3两种形态存在。钨在金属钆铸锭的下表面中心区域位置发生偏聚,含量最高,上表面二分之一半径处含量最低。演化迁移行为主要有两条途径,单质钨经脱落、熔解、熔体中迁移再分配、铸模内向中心和底部迁移;单质钨被氧化为氧化钨后,进入熔体与钆结合为Gd_2(WO_4)_3、铸模内向中心和底部迁移。从钨坩埚致密性、熔炼氛围、炉内残余氧量、原辅料纯度和升降温制度等方面调控后,可获得平均钨含量为0.008%的金属钆。 The element source,shape,distribution,evolution migration behavior and regulation of W in metal gadolinium were studied via calcium thermal reduction and XRD applying GdF3 as raw materials and Ca as reductant in vacuum induction furnace.The results show that W mainly comes from crucible and exists in forms of melt state tungsten and inclusion Gd2(WO4)3.Content of W is the highest under surface of central region and is the lowest at 1/2 radius on ingot casting surface while W in metal gadolinium ingot casting appears partial poly.Evolutionary migration behavior of W is presented as two forms including shed,dissolution, migration redistribution in melt,and migration to bottom and center in cast mold,or W being oxidized to WO3 in form of Gd2(WO4)3 in melt,and migrating to bottom and center in cast mold.Gadolinium containing 0.008% W is obtained through regulating compactness of tungsten crucible,melting atmosphere,residual oxygen in furnace,purity of raw supplementary materials and regulation of temperature.
作者 郝占忠 许林成 HAO Zhan-zhong;XU Lin-cheng(School of Chemistry, Baotou Teachers College, Baotou 014030, Inner Mongolia, China)
出处 《有色金属(冶炼部分)》 CAS 北大核心 2018年第4期65-70,共6页 Nonferrous Metals(Extractive Metallurgy)
基金 内蒙古自治区自然科学基金项目(2015MS0516) 包头师范学院阴山学者培养计划(01135005/047)
关键词 金属钆 演化迁移行为 形态 调控 metal gadolinium tungsten evolution migration behavior shape regulation
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  • 1李国栋,云月厚,邰显康,张伟.悬浮区熔-电迁移联合法提纯稀土金属的原理及机理[J].中国稀土学报,2002,20(z3):162-165. 被引量:8
  • 2杨庆山,柳术平,欧阳宇平,刘时中,苏正夫.高纯金属铽制备工艺研究[J].江西有色金属,2005,19(1):31-32. 被引量:6
  • 3A.伏尔斯基.冶金过程理论--火法冶金过程[M].董庆和译.北京:科学出版社,1987.
  • 4Dushman Saul.Scientific Foundtions of Vacuum Technique[M].New York:John Wiley and Sons.Inc,1995.
  • 5刘光华.稀土固体材料学[M].北京:机械工业出版社,1986:80-87.
  • 6Han M, Jiles D, Snyder J, Lo C, Leib J, Paulsen J, Pecharsky A. Thermal expansion studies on the unusual first order transition of GdSiGe: effects of purity of Gd [ J ]. J. Appl. Phys. , 2003, 93 : 8486.
  • 7Ostler T, Barker J, Evans R, Chantrell R, Atxitia U, Chubykalo- Fesenko O, E1 Moussaoui S, Le Guyader L, Mengotti E, Heyder- man L. Uhrafast heating as a sufficient stimulus for magnetization reversal in a ferrimagnet [J]. Nat. Commun. , 2012, 3: 666.
  • 8Waseda Y, Isshiki M. Purification Process and Characterizationof Ultra High Purity Metals : Application of Basic Science to Metal- lurgical Processing [ M]. German Berlin: Springer, 2002. 149.
  • 9Fort D. Purification Process and Characterization of Ultra High Purity Metals: Application of Basic Science to Metallurgical Pro- cessing [ M ]. German Berlin: Springer Verlag, 2002. 155.
  • 10Yamauchi C. The purification of rare-earth metals using solid- state electrotransport [ J]. Tetsu to Hagane, 1989, 75 (8) : 1237.

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