摘要
为了探索铼酸铵及铼粉中杂质元素尤其是碳元素的去除,利用扫描电子显微镜(SEM)和GDMS化学成分检测进行微观组织和材料中杂质元素含量分析。另外采用ThermoCalc热力学计算方法对碳杂质的气化行为进行了理论分析,辅助解释杂质去除机理。结果表明,铼酸铵溶液中通入臭氧可以提高铼酸铵纯度、降低碳含量。铼酸铵氢还原制备铼粉时,粉末碳含量没有发生本质变化。在等离子球化工艺中,低熔点金属杂质、碳杂质的含量均得到降低。通过最终的等离子球化除杂,铼粉纯度达到99.995%级,碳含量<0.001%。
The aim of this study is to research the removal of impurity elements especially carbon in ammonium rhenate and rhenium powders.The research methods include SEM microstructure analyses and GDMS chemical composition measurement of the impurity elements in materials.By applying ThermoCalc calculation method,the gasification behavior of carbon in the processes was also analyzed helping to explain the mechanism of impurity removing.The results showed that the injection of ozone gas into solution can improve the purity especially carbon of the ammonium rhenate.During the reduction of ammonium rhenate to rhenium,carbon content in the powders was not much changed.But,in the plasma sphero process,the amount of low-melting-point impurities and carbon was decreased.The composition testing indicated that the purity of the rhenium powder reach 99.995%,the carbon content was<0.001%after the plasma sphero cleaning process.
作者
周小彬
沈婕
原慷
王芦燕
ZHOU Xiaobin;SHEN Jie;YUAN Kang;WANG Luyan(BGRIMM Technology Group,Beijing 100160,China;Beijing Engineering Technology Research Center of Surface Strengthening and Repairing of Industry Parts,Beijing 102206,China;BGRIMM Advanced Materials Science&Technology Co.,Ltd.,Beijing 102206,China)
出处
《有色金属工程》
CAS
北大核心
2021年第9期11-16,共6页
Nonferrous Metals Engineering
基金
国家重点研发计划(2017YFB0305800)
西城区财政科技专项(XCSTS-TI2021-33)
矿冶科技集团有限公司科研基金项目(XC055)。
关键词
铼
铼酸铵
碳含量
除杂
rhenium
ammonium rhenate
carbon content
removing impurities
作者简介
周小彬(1988-),男,硕士,工程师,主要从事钨钼铼系列难熔金属粉末及高纯制品技术研究;通信作者:原慷(1987-),男,博士,高级工程师,主要从事3D打印难熔金属粉末及热障涂层研究。
