Magnetic powder core in-situ preparation method
An in-situ preparation and magnetic powder core technology, applied in the direction of magnetic objects, magnetic materials, inorganic materials, etc., can solve the problems of magnetic powder coating, magnetic powder core permeability reduction, and no introduction of preparation methods, etc., to overcome the magnetic properties of the matrix The effect of energy reduction, uniform particle size, high magnetic permeability and saturation magnetization
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Embodiment 1
[0017] FeCl 3 、NiCl 2 Salt and ZnCl 2 Salt mole Ni x Zn 1-x Fe 2 o 4 ( x =0.8), dissolved in deionized water to form a solution; add citric acid as a complexing agent, the amount of citric acid is the same as the number of moles of metal cations; after mixing well, add ammonia water dropwise to adjust the pH of the solution to 1, and continue to stir to form a sol.
[0018] Add FeSiAl soft magnetic alloy powder into the sol, stir and mix thoroughly, dry at 120°C to form a gel; heat treat in nitrogen or argon at 300°C; the amount of soft magnetic alloy can be determined according to the theoretical generation of ferrite. The soft magnetic alloy in the product is 70wt.%, and the ferrite is 30wt.%.
[0019] Take 0.1wt.% W-6C of the mass of the mixed powder, pour it into 50ml of acetone and stir to dissolve it, pour it into the above mixed powder in a water bath at 75°C, stir well for 1.5h until the mixture is evaporated to dryness and the powder is uniform mix.
[0020] ...
Embodiment 2
[0022] Fe(NO 3 ) 3 , Ni (NO 3 ) 2 and Zn (NO 3 ) 2 Moore than Ni x Zn 1-x Fe 2 o 4 ( x =0.5), dissolve in deionized water to form a solution; add citric acid as a complexing agent, the amount of citric acid is the same as the molar number of metal cations; after mixing well, add ammonia water dropwise to adjust the pH of the solution to 8, and continue to stir to form a sol.
[0023] Add FeSi soft magnetic alloy powder into the sol, stir and mix thoroughly, dry at 120°C to form a gel; heat treat in nitrogen at 700°C; the amount of soft magnetic alloy can be determined according to the theoretical generation of ferrite, so that the soft magnetic in the product The alloy is 99.9wt.%, and the ferrite is 0.1wt.%.
[0024] Take 4wt.% W-6C of the mass of the mixed powder, pour it into 50ml of acetone and stir to dissolve it, pour it into the above mixed powder in a water bath at 75°C, stir well for 2 hours until the mixture is evaporated to dryness, and the powder is evenl...
Embodiment 3
[0027] Will Fe 2 (SO 4 ) 3 、NiSO 4 and ZnSO 4 Moore than Ni x Zn 1-x Fe 2 o 4 ( x =0.6), dissolved in deionized water to form a solution; add citric acid as a complexing agent, the amount of citric acid is the same as the molar number of metal cations; after mixing well, add ammonia water dropwise to adjust the pH of the solution to 4, and continue to stir to form a sol;
[0028] Add FeNi soft magnetic alloy powder into the sol, stir and mix thoroughly, dry at 120°C to form a gel; heat treat in argon at 400°C; the amount of soft magnetic alloy can be determined according to the theoretical generation of ferrite, so that the soft magnetic alloy in the product The magnetic alloy is 80wt.%, and the ferrite is 20wt.%.
[0029] Take 0.3wt.% W-6C of the mass of the mixed powder, pour it into 50ml of acetone and stir to dissolve it, pour it into the above mixed powder in a water bath at 75°C, stir well for 1.5h until the mixture is evaporated to dryness and the powder is uni...
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