Highly sinterable cobalt ferrite particles prepared by a modified solution combustion synthesis

作者：Ianos Robert^*

来源：Materials Letters, 2014, 135: 24-26.

DOI：10.1016/j.matlet.2014.07.126

• Cobalt ferrite
• Nanocrystalline materials
• Magnetic materials
• Sintering

Highly sinterable CoFe2O4 particles were prepared by a modified solution combustion synthesis, starting from a stoichiometric mixture of cobalt acetate (instead of cobalt nitrate), iron nitrate and 5-aminotetrazole. The resulted cobalt ferrite powder had large surface area (44 m(2)/g), small crystallite size (11 nm) and a saturation magnetization of 38.9 Am-2/kg. CoFe2O4 pellets sintered at 1100 degrees C for 2 h developed a fine compact microstructure, reaching 99% of the theoretical density. After sintering, the saturation magnetization increased to 71.3 Am-2/kg whilst the coercivity decreased to 21.8 kA/m.

• 出版日期2014-11-15