Tape-casting temperature isostatic pressing composite molding preparation method of metal soft magnetic composite material
A composite material and warm isostatic pressing technology, which is applied in the fields of magnetism of inorganic materials, manufacturing of inductors/transformers/magnets, electrical components, etc., can solve the problems of non-dense green body structure, low molding density, and affecting the performance of functional materials, etc., to achieve The effect of high density uniformity, low porosity and smooth surface
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[0039] Example 1:
[0040] 1) Mix phosphoric acid and acetone into a passivation solution with a mass fraction of 0.6%, and take reduced iron powder with an average particle size of 150 μm and passivation solution for passivation at a mass ratio of 1:0.01, and stir in a mixer 0.5h, put into the oven for passivation, passivation temperature is 70℃, passivation time is 1h, and passivation powder is obtained. Add a mixed solvent to the passivation powder. The solvent is trichloroethylene and ethanol mixed in a ratio of 1:1, and the dispersant triolein is added, the above raw materials are mixed, stirred for 30h, and then the binder epoxy resin is added to increase The plasticizer is glycerin and dioctyl phthalate, the mass fraction of the binder is 20%, and the mass ratio of the binder to the plasticizer is 0.5. Stir the slurry for another 36 hours, disperse it with ultrasound for 5 minutes, filter it through a screen, and vacuum degas to prepare a uniformly dispersed slurry. The volu
Example Embodiment
[0045] Example 2:
[0046] 1) Mix phosphoric acid and ethanol into a passivation solution with a mass fraction of 0.8%, take the iron-nickel alloy powder with an average particle size of 0.1μm and the passivation solution for passivation in a mass ratio of 1:0.08, in a mixer Stir for 0.1h, put into an oven for passivation, passivation temperature is 100℃, passivation time is 0.1h, and passivation powder is obtained. Add a mixed solvent to the passivation powder, the solvent is methyl ethyl ketone and ethanol mixed in 1:10, and add the dispersant herring oil, mix the above raw materials, stir for 20h, and then add the binder epoxy resin, plasticizer polyethylene Diol, the mass fraction of the binder is 10%, and the mass ratio of binder to plasticizer is 0.8. Stir the slurry for another 30 hours, disperse it by ultrasonic for 3 minutes, filter it through a screen, and vacuum degas to prepare a uniformly dispersed slurry. The volume fraction of the solvent in the slurry is 60% of the
Example Embodiment
[0051] Example 3:
[0052] 1) Mix phosphoric acid and acetone into a passivation solution with a mass fraction of 0.1%, and take the iron-silicon-aluminum alloy powder with an average particle size of 150μm and the passivation solution for passivation in a mass ratio of 1:0.1, in a mixer Stir for 0.5h, put into the oven for passivation, passivation temperature is 40℃, passivation time is 4h, and passivation powder is obtained. Add a mixed solvent to the passivation powder, the solvent is trichloroethylene and methyl ethyl ketone mixed at 10:1, and the dispersant triethanolamine is added, the above raw materials are mixed, stirred for 36h, and then added W-6C magnetic powder glue, plasticizer glycerin, The mass fraction of the binder is 20%, and the mass ratio of binder / plasticizer is 1.0. Stir the slurry for another 40h, disperse it with ultrasound for 15 minutes, filter it through a screen, and vacuum degas to prepare a uniformly dispersed slurry. The volume fraction of solvent
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