Synthesis and magnetic properties of nanocomposite Ni1−x Co x Fe2O4–BaTiO3 fibers by organic gel-thermal decomposition process

摘要: Nanocomposites of ferrite and ferroelectric phases are attractive functional ceramic materials. In this work, the nanocomposite Ni1−x Co x Fe2O4–BaTiO3(x = 0.2, 0.3, 0.4, 0.5) fibers with fine diameters 3 ~ 7 μm high aspect ratios were synthesized by organic gel-thermal decomposition process from raw materials citric acid metal salts. The structure, thermal morphologies gel precursors resultant derived characterized Fourier transform infrared spectroscopy, thermogravimetric differential analysis, X-ray diffraction scanning electron microscopy. magnetic properties measured vibrating sample magnetometer. Fe2O4 perovskite BaTiO3 formed at calcination temperature 900 °C for 2 h. average grain sizes in increase about 15 nm to approximately 67 nm increasing temperatures 900 1,180 °C. saturation magnetization increases Co content, while coercivity reaches a maximum value single-domain size 65 nm Ni0.5Co0.5Fe2O4 obtained 1,100 °C.