Magnetic properties of FexCo1-x/CoyFe1-yFe2O4 composite under hydrothermal condition

다국어 초록 (Multilingual Abstract)

The metal–ferrite composites FexCo1-x/CoyFe1-yFe2O4 are synthesized by using disproportion of Fe (II)
and reduction of Co (II) by Fe0 under hydrothermal condition. The size of the particles of the composites
decreases as the [KOH] decreasing. The composites are measured by TEM and it can be deduced that
when [KOH] = 0.1, the size of the alloy body-centered cubic (BCC) in composites is 20 ± 7 nm, the size
of the Cobalt ferrite (spinel) is 170 ± 50 nm. The maximal value of the saturation magnetization (Ms)
of the composite is about 100.14 emu/g, which is synthesized under Co (II)/Fe (II) = 0.05, [KOH] = 1 N,
T = 150 ℃ and t = 3 h. The value of Hc of the composite synthesized under Co (II)/Fe (II) = 0.5, t = 3 h,
T = 150 ℃ and [KOH] = 10.2 mol/L is about 2878.19 Oe. The Fe–Co alloy is synthesized through a reduction
reaction of the composites in a flowing gaseous mixture. There is a maximal value (302.9 emu/g) of
the Ms for the alloys generated at 1000 ℃, which is the Co0.412Fe0.588 alloy.

다국어 초록 (Multilingual Abstract)

The metal–ferrite composites FexCo1-x/CoyFe1-yFe2O4 are synthesized by using disproportion of Fe (II)
and reduction of Co (II) by Fe0 under hydrothermal condition. The size of the particles of the composites
decreases as the [KOH] decreasing. The composites are measured by TEM and it can be deduced that
when [KOH] = 0.1, the size of the alloy body-centered cubic (BCC) in composites is 20 ± 7 nm, the size
of the Cobalt ferrite (spinel) is 170 ± 50 nm. The maximal value of the saturation magnetization (Ms)
of the composite is about 100.14 emu/g, which is synthesized under Co (II)/Fe (II) = 0.05, [KOH] = 1 N,
T = 150 ℃ and t = 3 h. The value of Hc of the composite synthesized under Co (II)/Fe (II) = 0.5, t = 3 h,
T = 150 ℃ and [KOH] = 10.2 mol/L is about 2878.19 Oe. The Fe–Co alloy is synthesized through a reduction
reaction of the composites in a flowing gaseous mixture. There is a maximal value (302.9 emu/g) of
the Ms for the alloys generated at 1000 ℃, which is the Co0.412Fe0.588 alloy.

참고문헌 (Reference)

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