摘要
Nanocrystalline NiFe2O4 particles with mean size of about 20 nm were directly synthesized by a novel microwave-assisted ball-milling approach, using basic nickel carbonate and iron powders as the raw materials. The results showed that an interme- diate product Fe2Ni2（OH）sCO3 · 2H2O was formed by milling NiCO3 · 2Ni（OH）2· 4H2O and Fe powders with microwave assis- tance, then this intermediate product further reacted to form NiFe2O4 nanocrystals. On the other hand, by using NiO and Fe2O3 as the raw materials, NiFe2O4 could not be able to form. NiFe2O4 nanocrystals could be directly synthesized without post-sintering by this process. This makes it a new promising approach for ferrite nanoparticle, which is simple and environ- mentally friendly.
基金
supported by the Program for New Century Excellent Talents in University (Grant No. NCET-10-0360)
the Fundamental Research Funds for the Central Universities,Hunan university (Grant No.531107040366)
