Microwave-Assisted Combustion Synthesized Sm₂Co₁₇ Magnetic Particles for Permanent Magnetic Application

Abstract

We reported the new synthesis of Sm2Co17 particles by a microwave-assisted combustion (MACS) method. This process enables the controlled decomposition of Sm(NO3)3 and Co(NO3)2 into SmCo-O particles, followed by calcium reduction-diffusion. This SmCo-O particle provides an approach for achieving high magnetic properties in Sm2Co17 magnetic materials. The rhombohedral Sm2Co17 particles can be incorporated into epoxy resin and oriented, displaying a square-like hysteresis loop. The particles display magnetic properties at room temperature, with a saturation magnetization of 112.3 emu/g, coercivity of 5.6 kOe, and a maximum energy product of 9.4 MGOe. This method improves the synthesis efficiency of rare earth cobalt-based nano-materials, expands the synthesis scope, and provides ideas for the synthesis and applications of other rare earth nano-materials.

Keywords

• microwave-assisted combustion
• SmCo-O
• Sm₂Co₁₇ particles
• magnetic properties