Novel microwave assisted chemical synthesis of Nd2Fe14B hard magnetic nanoparticles
作者： Viswanathan Swaminathan , Pratap Kumar Deheri , Shekhar Dnyaneswar Bhame , Raju Vijayaraghavan Ramanujan
DOI: 10.1039/C3NR33296A
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摘要: The high coercivity and excellent energy product of Nd2Fe14B hard magnets have led to a large number value added industrial applications. Chemical synthesis nanoparticles is challenging due the reduction potential Nd3+ tendency for oxidation. We report novel by microwave assisted combustion process. process consisted Nd–Fe–B mixed oxide preparation combustion, followed CaH2. This fast, efficient offers facile elemental substitution. resulting powders was ∼8.0 kOe saturation magnetization ∼40 emu g−1. After removal CaO washing, increased an 3.57 MGOe obtained. A range magnetic properties obtained varying power, temperature Nd Fe ratio. transition from soft exchange coupled composition NdxFe1−xB8 (x varies 7% 40%). procedure inexpensive platform produce magnets.
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