A kind of iron silicon titanium magnetic powder core and its preparation method and application
An iron-silicon and titanium-magnetism technology, applied in the field of iron-silicon-titanium magnetic powder cores and their preparation, can solve the problems of inability to meet high-frequency electronic components, and the volume ratio loss of metal magnetic powder cores is reduced and inconspicuous.
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[0023] The invention provides a method for preparing a ferrosilicate magnetic powder core, comprising the following steps:
[0024] (1) Mix iron source, silicon source and titanium source, and use gas atomization process to prepare alloy powder; the mass ratio of iron in the iron source, silicon in the silicon source and titanium in the titanium source is (91.5~93.5):6.5 : (0.01~2);
[0025] (2) After mixing the alloy powder obtained in the step (1) and the silicone resin solution, drying to obtain a resin mixture;
[0026] (3) The resin mixture obtained in the step (2) is sequentially subjected to pressing and annealing treatment to obtain a sendustitan magnetic powder core.
[0027] The invention mixes the iron source, the silicon source and the titanium source, and prepares the alloy powder by a gas atomization process. In the present invention, the mass ratio of iron in the iron source, silicon in the silicon source, and titanium in the titanium source is (91.5-93.5):6.5...
Embodiment 1
[0049] According to the mass ratio of Fe-6.5wt% Si-0.66wt% Ti, the raw materials of industrial pure iron, high-purity polysilicon and sponge titanium are prepared by gas atomization process to produce alloy powder. Use acetone as a solvent to prepare a silicone resin solution with a mass fraction of 10%, and mix the alloy powder and the silicone resin solution at a mass ratio of 100:1.5, and the acetone will volatilize during the mixing process , and then dried under vacuum at 100°C for 1 hour to completely volatilize acetone; press the mixture into a ring shape under 2000MPa to obtain an alloy powder compact; use Ar as a protective atmosphere to place the above alloy powder compact in a sintering furnace Anneal heat treatment at 500° C. for 2 hours to obtain sendustitan magnetic powder core.
[0050] The cross-sectional structure of the magnetic powder core obtained in Example 1 was scanned by an electron microscope. Test results such as image 3 shown. image 3 The circle...
Embodiment 2
[0052] According to the mass ratio of Fe-6.5wt%Si-1.14wt%Ti, the alloy powder is prepared by gas atomizing raw materials of pure iron, pure silicon and pure titanium. Using acetone as a solvent, prepare a silicone resin solution with a mass fraction of 5%, stir and mix the alloy powder and the silicone resin solution at a mass ratio of alloy powder to silicone resin solution of 100:0.5, during the mixing process acetone will Volatilize, and then dry at 90°C for 1.5 hours under vacuum conditions to completely volatilize the acetone; press the mixture into a ring shape under 1900MPa to obtain an alloy powder compact; use Ar as a protective atmosphere, place the above alloy powder compact into a sintering Anneal heat treatment at 500°C for 2 hours in the furnace to obtain sendustitan magnetic powder core.
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