| 摘要 |
PURPOSE: A method for preparing metal ferrite from a metal oxide is provided to uniformly prepare metal ferrite nanoparticles and to ensure low magnetization value. CONSTITUTION: A method for preparing metal ferrite nanoparticles for a contrast agent comprises: a step of adding iron precursor to a colloid solution of MO(M: bivelant metal) nanoparticles; and a step of reacting at 50-300 °C for 0.5-3 hours to prepare a metal ferrite nanoparticles having MFe_2O_4. M is Fe, Co, Mn, Ni, Cu, or Zn. The iron precursor is Fe-oleate, Fe-carboxylate, or mixture thereof.
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