【摘 要】
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SmCo5 nanoparticles (NPs) have promising applications in high-density magnetic storage and magnetic nanocomposites.In this work,A novel method to yield SmCo5 pa
【机 构】
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School of Materials Science and Engineering, Beihang University, Beijing 100191, China
论文部分内容阅读
SmCo5 nanoparticles (NPs) have promising applications in high-density magnetic storage and magnetic nanocomposites.In this work,A novel method to yield SmCo5 particles with small size and high coercivity was reported.Firstly,Sm2O3-Co NPs with size of 6-15 nm were fabricated by a solvothermal route.Then the agglomerated SmCo5 particles were obtained by thermal reduction of the precursor,which show high coercivity of 2.0 T at room temperature.At last,the as-synthesized SmCo5 particles were further hydrogenated under high hydrogen pressure of 4 MPa at room temperature,where hydrogen absorption process could form small-sized SmCo5Hx particles due to their lattice expansion and hydrogen desorption process could convert SmCo5Hx NPs into SmCo5 NPs.The prepared SmCo5 NPs after hydro-genation,showing well distribution,have a small size of 5-20 nm and room temperature coercivity of 1.22 T.
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