首页|基于氧化石墨吸附镧在纯铁中直接合金化行为研究

基于氧化石墨吸附镧在纯铁中直接合金化行为研究

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研究了基于氧化石墨吸附镧元素在钢铁材料的基体成分纯铁中直接合金化行为.首先利用具有吸附性能的氧化石墨将镧离子吸附在其含氧官能团上,形成层间化合物,并利用傅里叶变换红外光谱仪分析了吸附过程,再将该层间化合物与铝粉均匀混合后压制成块,在高纯氩气保护下的高温管式炉中经过1600℃保温10 min后随炉冷却至室温,然后用X射线衍射仪(XRD)和扫描电镜(SEM)分析产物.最后,将上述压块用铁皮包覆后用石英管压入熔融的纯铁中进行直接合金化,并用电感耦合等离子体质谱仪检测不同取出时间的纯铁样品中的镧含量.研究结果表明,氧化石墨可以将镧离子吸附在其—OH和—COOH上,形成氧化石墨/镧层间化合物;在1600℃时铝可以将氧化石墨中吸附的镧元素还原成LaC2、LaAlO3和La1.98O2.13S0.84,其中的LaC2可以溶解至铁水中并完成镧的合金化过程.
Study on Direct Alloying Behavior of Lanthanum in Pure Iron Based on the Graphite Oxide Adsorbing
Direct alloying behavior of rare earth lanthanum in pure iron based on the graphite oxide adsorbing has been studied in this paper.Firstly,the rare-earth lanthanum ions were adsorbed on the oxygen-containing functional groups of graphite oxide,after then the intercalation compound was formed and the adsorption process has been analyzed by the Fourier transform infrared spectrometer.Subsequently,the intercalation compound was mixed evenly with aluminum powder and pressed into blocks,which were kept in a high temperature tube furnace under the protection of high purity argon at 1600 ℃for 10 min,and then cooled to room temperature in the furnace.Then the products were analyzed by X-ray diffractometry(XRD)and scanning electron microscopy(SEM).Finally,the above blocks were coated with iron sheet and pressed into the molten pure iron with quartz tube for direct alloying.The contents of rare earth lanthanum in the pure iron samples which were taken out at different times,have been measured by the inductively coupled plasma mass spectrometer.The results prove that:Graphite oxide can adsorb rare earth lanthanum ions on its—OH and—COOH to form graphite rare earth lanthanide intercala-tion compound.At 1600 ℃,Al can reduce the rare-earth lanthanum element of the intercalation compound to LaC2,LaAlO3 and La1.98O2.13S0.84.Specially,LaC2 can be dissolved in molten iron and complete the alloying process of rare-earth lantha-num.

graphite oxideadsorptionlanthanum elementdirect alloying

刘玉宝、瞿伟、侯渊、杨鹏飞、岑治、刘小芳、张丽、王霄

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白云鄂博稀土资源研究与综合利用全国重点实验室,内蒙古 包头 014030

内蒙古科技大学材料与冶金学院,内蒙古 包头 014010

中国北方稀土(集团)高科技股份有限公司,内蒙古 包头 014030

氧化石墨 吸附 镧元素 直接合金化

内蒙古自治区重点基金项目内蒙古科技计划项目内蒙古科技计划项目内蒙古自然科学基金项目内蒙古自治区重大专项

2023ZD032020GG01822021GG00942021BS05012ZDZX2018032

2024

稀土
中国稀土学会 包头稀土研究院

稀土

CSTPCD北大核心
影响因子:1.172
ISSN:1004-0277
年,卷(期):2024.45(3)
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