Magnetic core and coil component
A magnetic core and X-ray technology, applied in the direction of magnetic core/yoke, inductor with magnetic core, transformer/inductive parts, etc., can solve the problems of high saturation magnetic flux density and low resistivity of magnetic core, Achieve the effect of high initial magnetic permeability
Active Publication Date: 2019-05-03
HITACHI METALS LTD
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Problems solved by technology
The magnetic core obtained by compacting the molded body of the magnetic alloy powder has a high saturation magnetic flux density. On the other hand, since it is an alloy powder, the resistivity is low, and water glass, thermosetting resin, etc. are used in advance to form a magnetic core. Magnetic alloy powder for insulation coating
Method used
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Embodiment
[0062] Next, preferred embodiments of the present invention will be explained in detail by way of example. In addition, in the description, a Fe—Al—Cr-based alloy is used as the Fe-based alloy. However, the scope of the present invention is not limited to the following examples unless there is a description of particular limitations on materials, compounding amounts, and the like described in the examples.
[0063] (1) Preparation of raw material powder
[0064] The raw material powder of the Fe-based alloy was produced by an atomization method. Table 1 shows the composition analysis results.
[0065] Table 1
[0066]
[0067] For each analysis value, Al is by ICP emission analysis method, Cr is by volumetric method, Si and P are by absorptiometry, C and S are by combustion-infrared absorption method, O is by inert gas melting-infrared absorption method, N is by inert gas The gas melting thermal conductivity method was used to obtain the analytical values respectively. ...
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Abstract
Provided are: a magnetic core having a high initial permeability; and a coil component using same. This magnetic core exhibits, in an X-ray diffraction spectrum, a peak intensity ratio (P1 / P2) of nothigher than 0.015 between a peak intensity P1 that is of a diffraction peak of a Fe oxide having a corundum structure and that appears in the vicinity of 2 theta=33.2-degree and a peak intensity P2 that is of a diffraction peak of a Fe-based alloy having a bcc structure and that appears in the vicinity of 2 theta=44.7-degree, and a peak intensity ratio (P3 / P2) of 0.015-0.050 between a peak intensity P3 that is of a superlattice peak of a Fe3Al ordered structure and that appears in the vicinity of 2 theta=26.6-degree and the peak intensity P2.
Description
technical field [0001] The present invention relates to a magnetic core using Al-containing Fe-based alloy particles and a coil component using the magnetic core. Background technique [0002] Conventionally, coil components such as inductors, transformers, choke coils, and motors have been used in various applications such as home appliances, industrial equipment, and vehicles. Common coil components are often composed of a magnetic core (magnetic core) and a coil wound around the magnetic core. As the magnetic core, ferrite excellent in magnetic properties, shape freedom, and price is widely used. [0003] In recent years, with the miniaturization of power supply devices such as electronic equipment, the demand for coil components that are small, low in height, and can be used under high current has become stronger and stronger. Compared with ferrite, it has tended to use A magnetic core made of metal-based magnetic powder with a high saturation magnetic flux density. ...
Claims
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IPC IPC(8): H01F1/147B22F1/00C22C38/00H01F1/24H01F1/33H01F17/04H01F27/255
CPCH01F1/147H01F1/24H01F1/33C22C2202/02C22C38/06C22C38/02C22C38/18H01F3/08H01F41/0246C22C33/0285B22F2998/10C21D6/002H01F27/292H01F27/2828C21D8/12C22C1/0433B22F1/00B22F9/082B22F1/10B22F3/02B22F2003/248H01F17/04H01F27/255H01F27/2823H01F37/00C22C38/00H01F1/14791H01F27/28
Inventor 三原敏男加藤哲朗西村和则野口伸
Owner HITACHI METALS LTD