Synthesis and magnetic property of boron nitride nanocapsules encaging iron and cobalt nanoparticles

摘要

Boron nitride (BN) nanocapsules encaging Fe or Co nanoparticles were synthesized by using Fe4N/B or Co(NH3)(6)CI3/KBH4 powders as raw materials, respectively. The Fe4N was reduced to alpha-Fe during annealing at 1000 degrees C for several hours with flowing 100 sccm N-2 gas, and the reaction was predicted by Ellingham diagram. Co nanoparticles with BN layers were also produced by annealing the powders at 1000 degrees C in nitrogen atmosphere. These BN nanocapsules with magnetic nanoparticles exhibited soft magnetic characteristics and good oxidation resistance. (c) 2006 Elsevier Ltd. All rights reserved.