JPS59119801A - Composite soft magnetic material - Google Patents

Abstract

PURPOSE:To enhance a permeability/cost ratio by combining flaked soft magnetic material with a binder of plastic or metal. CONSTITUTION:Flaked soft magnetic material is combined with a binder. As the flaked soft magnetic material, those obtained by smashing pure iron particles, soft steel or alloy steel with a roller and then annealing them are used. As a plastic to be used as a binder, an ordinary plastic can be used. As a metal binder, a single material or alloy, for example, of Al, Cu, Zn, Sb, In, Sn, Pb, Cu, Cd, etc. which can be sintered at a low melting point and has a high strength can be used. For instance, a mixture with a maximum diameter/mean thickness ratio of 2, containing the flaked pure iron of 70 vol% and epoxy resin of 30 vol%, is formed and it is then compressed and molded to a ring-shape and then cured at 150 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is characterized by bonding flaky soft magnetic materials (maximum diameter/average thickness of 3 or more) with a binder phase such as plastic or metal, and reducing magnetic permeability/cost. It is characterized by a large ratio.

As is well known, composite soft magnetic gel materials made by bonding soft magnetic powders with a binder have been put to practical use as industrial materials.

The l-magnetic permeability is low, ranging from 10 to 30, compared to 300 for pure iron.
It is about 1/1000th. Further, high-grade composite soft magnetic materials using fission-like soft magnetic materials are also under development, but they have the disadvantage of high cost.

The deceased focused on the fact that the flaky soft magnetic material was the main raw material for a composite soft magnetic material with high cost performance7.
, 5 Newly prototyped flaky pure iron.

This is what achieved Moe Moe.

The purpose of the invention is to increase permeability/cost.

The present invention will be specifically described below with reference to Examples.

The flaky soft magnetic material used in the present invention was obtained by crushing a granular soft magnetic material using a rolling mill and then annealing it.

Example 1 Four mixtures containing 70% by volume of flaky pure iron with a maximum diameter/average thickness of 2 and 60% by volume of epoxy resin were prepared,
A ring-shaped test piece of φ4G×φ3Q (rolling) was made by compression molding and cured at 150°CX2H to obtain a test piece. For magnetic measurement, 10 detection and excitation coils were installed on the ring-shaped test piece.
Wind it 0 times, make a 4π knee H curve with a DC small-scale measuring machine,
after that.

Magnetic permeability and saturation magnetic flux density were measured. The first measurement result is
For your reference, the characteristics of conventional composite soft magnetic materials and filamentary composite soft magnetic materials are added.

Below is the shape of the test piece and the test method @1ml.

Example 1 Table 1 Using flaky pure iron having a maximum diameter/average thickness of 4 to 6.20 to 40, samples were prepared and measured in the same manner as in the examples. If the maximum diameter/average thickness is large, there will be a difference in magnetic permeability in the compression direction and in the perpendicular direction.6 Permeability becomes sharper as the maximum diameter/'average thickness becomes larger, but if the value exceeds 40, it will become saturated. Shiguru. Table 1 shows the results of the strength measurement and the permeability/cost.

Example 6 Add 30 parts by volume of 60Pb + 40φSn alloy powder as a binder to the flaky pure iron used in Examples 1 and 2, mix well in a wet ball mill (alumina balls φ51), and after drying 2 tons/ It was pressed at a pressure of ct and sintered in a Ha gas atmosphere. Table 1 shows the magnetic permeability/cost results and the magnetic permeability/cost.

The metal bonding method is used to improve heat resistance and has a heat resistance temperature of 200°C, which is 80°C higher than that of epoxy resin.

The following describes only a part of the present invention. When the maximum diameter/average thickness of flaky pure iron is 5 or more, the magnetic permeability/cost is significantly large.

In the present invention, soft magnetic materials include pure iron, mild steel 1 alloy j% (
'Fe and c + S l + M n 20 r, A
I + V, Nl or/so [2 and alloy with C○]
point to Also, the binding material is a plastic neck and metal. Examples of plastics that are commonly used for plastics include vinyl chloride, polyvinyl 2, polyethylene, polypropylene, synthetic rubber, acrylic, and styrene.

Single and composite materials such as Delson, polycarbonate, epoxy 3 polyester, Area 9 melamine, polyimide, and polysulfone. Metallic bonding material.

It can be sintered at a low melting point. 1. It is necessary to have high strength. 2.
Then, A I + Ou, Z n = E b
*Engine, sn, I'bCu, Od, etc. alone and alloys.

As described above, the present invention manufactures a soft magnetic material into flake-like Nissle with high cost performance and magnetic permeability/
This is due to increased costs.

The composite soft magnetic material of the present invention is highly practical for use in motors, electrical couplings, and electro-mechanical exchange devices.

Claims (1)

[Claims] A composite soft magnetic material characterized by bonding flaky soft magnetic materials with a binding material,