Amorphous Alloy Soft Magnetic Powder And Method For Manufacturing Amorphous Alloy Soft Magnetic Powder
AssigneeSeiko Epson Corporation
InventorsTakuma ENOMOTO, Junya ABE, Kai KITAMURA, Hiroyoshi OTAKA
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Abstract
An amorphous alloy soft magnetic powder contains a particle having a flat shape, has a volume-based average particle diameter of more than 150 μm and 500 μm or less measured by a laser diffraction and scattering particle size distribution analyzer, and has a coercive force of 398 A/m or less, i.e., 5.0 Oe or less. A proportion of particles having a particle diameter of more than 300 μm and 600 μm or less classified by sieving may be 15 mass % or more and 40 mass % or less.
Claims5
An amorphous alloy soft magnetic powder comprising:
- a particle having a flat shape, wherein
- the amorphous alloy soft magnetic powder has a volume-based average particle diameter of more than 150 μm and 500 μm or less measured by a laser diffraction and scattering particle size distribution analyzer, and a coercive force of 398 A/m or less, i.e., 5.0 Oe or less.
A method for manufacturing an amorphous alloy soft magnetic powder using a device including
- a molten metal supply portion that causes a molten metal to flow down,
- a tubular body provided below the molten metal supply portion, and
- a coolant outflow portion that causes a coolant to flow out along an inner circumferential surface of the tubular body to form a swirling flow,
- the method for manufacturing an amorphous alloy soft magnetic powder comprising:
- causing the molten metal to flow down from the molten metal supply portion while narrowing the molten metal to a diameter of 1 mm or more and 10 mm or less;
- and
- causing the molten metal that flows down to enter the swirling flow at a speed of 50 m/sec or more and 150 m/sec or less without being scattered by gas to obtain an amorphous alloy soft magnetic powder, wherein
- the amorphous alloy soft magnetic powder,
- contains a particle having a flat shape,
- has a volume-based average particle diameter of more than 150 μm and 500 μm or less measured by a laser diffraction and scattering particle size distribution analyzer, and
- has a coercive force of 398 A/m or less, i.e., 5.0 Oe or less.
Dependencies are inferred from the claim text.