Magnetic material, magnet, and rotating machine
A magnetic material and rotating machine technology, applied in the fields of magnets, magnetic materials, and rotating machines, can solve the problems of energy product reduction and difficulty in using rotating machines, and achieve the effects of reducing magnetic flux density and energy product reduction and suppression
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Embodiment 1
[0020] The NdFeB alloy is hydrodehydrogenated powder having a particle size of about 1 to 1000 μm, and the coercivity of the powder at room temperature is 16 kOe. mixed with the NdFeB (main phase is Nd 2 Fe 14 B) The fluoride of the powder is NdF 3 . NdF 3 The raw material powder is pre-pulverized to form an average particle size from 0.01 to 100 μm, mixed with NdFeB powder and NdF 3 And pour it into the gap between the twin rolls. In order to make the shape of the fluoride powder into a layer, let the roll surface temperature range from 300°C to 600°C, NdFeB powder and fluoride powder are easily deformed by the roll. The fluoride is deformed into a flat shape together with the NdFeB powder by double rollers. The pressure is 100kg / cm 2 above. The magnetic powder pressed by the twin rolls forms fluoride in layers on the surface of the magnetic powder, and fluoride may be mixed as needed and pressed by the twin rolls. Mixed fluorides except NdF 3 In addition, there are...
Embodiment 2
[0022] A treatment solution for forming a dysprosium (Dy) fluoride coating film was produced as follows.
[0023] (1) Introduce 4 g of Dy acetate or Dy nitrate, which are highly soluble salts in water, into about 100 mL of water, and dissolve completely using a vibrator or an ultrasonic stirrer.
[0024] (2) Slowly add hydrogen fluoride diluted to 10% to achieve the generation of DyF 3 The equivalent of the chemical reaction.
[0025] (3) Use an ultrasonic stirrer for the gel-like precipitated DyF 3 The resulting solution was stirred for more than 1 hour.
[0026] (4) After centrifugation at a speed of 4000 r.p.m, the supernatant liquid was removed, and approximately the same amount of methanol was added.
[0027] (5) Stir the DyF containing gel 3 After the methanol solution became a suspension completely, it was stirred with an ultrasonic stirrer for more than 1 hour.
[0028] (6) Repeat the operations of (4) and (5) 4 times until no anions such as acetate ions or nitrat...
Embodiment 3
[0039] A treatment solution for forming a neodymium (Nd) fluoride coating film was prepared as follows.
[0040] (1) Introduce 4 g of Nd acetate or Nd nitric acid, which are highly soluble salts in water, into about 100 mL of water, and dissolve completely using a vibrator or an ultrasonic stirrer.
[0041] (2) Slowly add hydrogen fluoride diluted to 10% to achieve the generation of NdF 3 The equivalent of the chemical reaction.
[0042] (3) Use an ultrasonic stirrer to generate gel-like precipitated NdF 3 The solution was stirred for more than 1 hour.
[0043] (4) After centrifugation at a speed of 4000 r.p.m, the supernatant liquid was removed, and approximately the same amount of methanol was added.
[0044] (5) Stirring containing gel-like NdF 3 After the methanol solution became a suspension completely, it was stirred with an ultrasonic stirrer for more than 1 hour.
[0045] (6) Repeat the operations of (4) and (5) 4 times until no anions such as acetate ions or nitrat...
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