Fabrication of ferromagnetic nanocluster rods by magnetic trapping
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In a one-pot fabrication at room temperature, both an iron-neodymium-dysprosium-boron permanent magnet (Fe66Nd28Dy4B1) and cobalt (Co) metal have been directly converted into the corresponding ferromagnetic nanometer-scale cluster (nanocluster) rods using pulsed-laser ablation combined with magnetic-field trapping. The morphology of the produced nanomaterials was analyzed by electron microscopy and the composition by electron energy-loss spectroscopy, and it was found that one-dimensional structured soft magnets, up to ∼150 nm in length, consist of magnetic clusters a few nanometers in diameter. The mechanism and driving behind their growth process and their magnetic evolution have been proposed.Keywords:
Dysprosium
Nanometre
Laser Ablation
Dysprosium
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The behavior and control of impurities in dysprosium metal metallurgy are investigated by experiments The impurities in dysprosium metal such as O, Fe and Al are from the raw material dysprosium fluoride, and the Ca, F and W are drawn into dysprosium metal by smelting process The high quality dysprosium metal can be made by control of dysprosium fluoride quality and operation parameters, and avoidance of Fe and Al contamination The recovery of dysprosium is up to 95%, and low contents of Ca, F and W are achieved in the condition of 9%～13% Ca dosage, 1460℃ smelting temperature, and 10～20min retention time
Dysprosium
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Manufacturing technologies and refinement methods for dysprosium metal were reviewed. The application of dysprosium in NdFeB permanent magnet,rare earth giant magnetostrictive material,magneto optical recording media and other rare earth functional materials were introduced. Some suggestions were given on further research and development as well as mass production of dysprosium metal.
Dysprosium
Neodymium magnet
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Dysprosium
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A ICP AES method for determination of 15 elements in metal dysprosium and dysprosium oxide was developed.The operating conditions of ICP AES were optimized by orthogonal design. Recovery with this method is 93.6%～108% with RSD less than 6.5%.
Dysprosium
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Dysprosium
Mechanosynthesis
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A sensitive spectrofluorimetric procedure was described for the determination of dysprosium in mixed rare earths,which was based on the fluorescence of the dysprosium-4-chlorsalicylic acid(CSA)-EDTA-cetyltrimethylammonium bromide(CTMAB) complex.The effect of the experimental conditions on the fluorescence intensity was defined.Under the optimum conditions selected,the fluorescence intensity was linear with dysprosium concentration in the range of 1.5×10-7 ～ 1.4×10-5 mol/L.The detection limits(S/N=3) was 4×10-9 mol/L for dysprosium.With this method,the contents of dysprosium in two rare earths oxides were successfully determined.
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Dysprosium
Thermal Stability
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Dysprosium
Liquidus
Boron oxide
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