Scanning Electron Microscope-Cathodoluminescence Analysis of Rare-Earth Elements in Magnets
Scanning Electron Microscope-Cathodoluminescence Analysis of Rare-Earth Elements in Magnets
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扫描电子显微镜-阴极发光分析磁铁中的稀土元素
DOI：
10.1017/s1431927615015676
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发表时间：
2016
影响因子：
2.8
通讯作者：
and Jun Kawai
中科院分区：
文献类型：
--
作者：
Susumu Imashuku;Kazuaki Wagatsuma;and Jun Kawai
对钕铁硼（NdFeB）和钐钴（Sm-Co）磁体进行了扫描电子显微镜阴极发光（SEM-CL）分析，以分析磁体中存在的稀土元素。我们研究了SEM-CL分析的优势，传统的分析方法，如扫描电镜能量色散X射线（EDX）光谱和扫描电镜波长色散X射线（WDX）光谱的元素分析的NdFeB磁体中的稀土元素。用扫描电镜-化学发光法测定了磁体中元素的氯化物的发光光谱。通过在磁体上滴加盐酸，然后在真空中干燥来获得氯化物。钕铁硼磁体中分别检测到钕、镨、铽和镝，钐-钴磁体中通过SEM-CL方法检测到钐。另一方面，镝浓度为1.05wt%的NdFeB磁体中，通过以往的SEM-EDX分析难以区分铽和镝。通过SEM-CL分析检测到NdFeB磁体中浓度为0.02wt%的铽，但通过常规SEM-WDX分析检测不到。与传统的SEM-EDX和SEM-WDX分析相比，SEM-CL分析在检测NdFeB磁体中的痕量稀土元素，特别是镝和铽方面具有优势。
Scanning electron microscope-cathodoluminescence (SEM-CL) analysis was performed for neodymium–iron–boron (NdFeB) and samarium–cobalt (Sm–Co) magnets to analyze the rare-earth elements present in the magnets. We examined the advantages of SEM-CL analysis over conventional analytical methods such as SEM-energy-dispersive X-ray (EDX) spectroscopy and SEM-wavelength-dispersive X-ray (WDX) spectroscopy for elemental analysis of rare-earth elements in NdFeB magnets. Luminescence spectra of chloride compounds of elements in the magnets were measured by the SEM-CL method. Chloride compounds were obtained by the dropwise addition of hydrochloric acid on the magnets followed by drying in vacuum. Neodymium, praseodymium, terbium, and dysprosium were separately detected in the NdFeB magnets, and samarium was detected in the Sm–Co magnet by the SEM-CL method. In contrast, it was difficult to distinguish terbium and dysprosium in the NdFeB magnet with a dysprosium concentration of 1.05 wt% by conventional SEM-EDX analysis. Terbium with a concentration of 0.02 wt% in an NdFeB magnet was detected by SEM-CL analysis, but not by conventional SEM-WDX analysis. SEM-CL analysis is advantageous over conventional SEM-EDX and SEM-WDX analyses for detecting trace rare-earth elements in NdFeB magnets, particularly dysprosium and terbium.
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DOI：
10.1007/bf00323334
发表时间：
1995
期刊：
Fresenius' Journal of Analytical Chemistry
影响因子：
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作者：
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DOI：
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发表时间：
2000
期刊：
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DOI：
10.1109/jrproc.1955.278052
发表时间：
1955
期刊：
Proceedings of the IRE
影响因子：
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作者：
G. F. J. Garlick
通讯作者：
G. F. J. Garlick
影响因子：
3.2
作者：
SAGAWA, M;FUJIMURA, S;MATSUURA, Y
通讯作者：
MATSUURA, Y
影响因子：
4.2
作者：
M. Thompson;M. Ramsey;B. Coles
通讯作者：
B. Coles