Preparation of iron fine particles coated with boron nitride layers

作者：Tokoro H^*; Fujii S; Oku T; Segi T; Nasu S

来源：Materials Transactions, 2004, 45(9): 2941-2944.

DOI：10.2320/matertrans.45.2941

• iron fine particles
• boron nitride layers
• catalyst for boron nitride formation

Boron (B) powders mixed with hematite or iron (Fe) nanoparticles were annealed at 1573 K in nitrogen atmosphere. X-ray diffraction measurement shows that mixture of B and hematite changed to boron nitride (BN) and metallic Fe after the annealing without the formation of FeB compounds like FeB and Fe2B. FeB compound was generated from a mixture of B and Fe. High-resolution transmission electron microscopy shows that Fe particles were similar to300 nm in diameter and they were coated with BN layers. Mossbauer spectroscopy revealed a reduction of hematite to Fe. Synthesized Fe fine particles have an oxidation resistance up to 673 K.

• 出版日期2004-9