JPH03155102A - Highly conductive magnetic material - Google Patents

Abstract

PURPOSE:To acquire high electrical conductivity and good magnetic properties by dispersing and forming ferrite in copper or copper group alloy. CONSTITUTION:For example, a ferrite powder of average diameter of 200mum is added by 2 weight ratio to 1 weight ratio of pure copper powder of average grain diameter of 150mum manufactured by water atomizing method, fully mixed to be pressed-formed to a rod-shape, and sintered in a nitrogen atmosphere. The formed rod has good magnetic properties and high electrical conductivity; the reason is that conductivity lowers only by a volume occupied by ferrite in conductive metal since crystalline lattice of copper is continuous with ferrite and therefore has extremely little distortion. As the magnetic material is provided with magnetic properties and electrical conductivity, it can be used for a relay part wherein a magnetic part and a conductive part are formed integrally.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a highly conductive magnetic material that has both excellent magnetic properties and high electrical conductivity and is used in magnetic cores or magnets such as electromagnets.

[Conventional technology]

There are two types of magnetic materials: metallic and nonmetallic. Nonmetallic materials have almost no electrical conductivity, and metallic materials are mainly made of iron and nickel, and their electrical conductivity is considerably inferior to that of copper. Among conventional magnetic materials, there has been no magnetic material with high electrical conductivity.

[Problem to be solved by the invention]

Conventional magnetic materials, even metal-based materials, had poor electrical conductivity and were therefore not used as highly conductive magnetic materials.

In order to solve the problems of conventional magnetic materials, the present invention aims to provide a highly conductive magnetic material that has both excellent magnetic properties and high electrical conductivity.

(Means for Solving the Problems) The present invention is a highly conductive magnetic material used for magnetic cores or magnets such as electromagnets, characterized in that it is formed by dispersing ferrite in copper or a copper-based alloy. It is related to highly conductive magnetic materials.

(Function) In the present invention, high electrical conductivity and excellent magnetic properties are obtained because ferrite is dispersed and molded in copper or a copper-based alloy.The reason for this is explained below.

When a certain substance is added to a conductive metal, when the additive becomes a solid solution in the conductive metal, the crystal lattice of the conductive metal is distorted due to the solid solution, resulting in an increase in electrical resistance. On the other hand, if the additive does not form a solid solution at all in the conductive metal, the crystal lattice of the conductive metal is not continuous with the additive, so the distortion is very small, and the volume occupied by the additive in the conductive metal is It appears that the conductivity decreases by Therefore, the electrical conductivity is obtained based on the average weight ratio of the electrically conductive metal and its additives. This invention focuses on this principle, and the ferrite, which has excellent magnetic properties and does not form a solid solution in copper or copper-based metal, is dispersed and molded into copper or copper-based alloy, which has high electrical conductivity. A highly conductive magnetic material that has both magnetic properties and high electrical conductivity can be obtained.

〔Example〕

The present invention will be explained below based on examples.

Add 2 weight ratios of ferrite powder with an average particle size of 200 μm having the characteristics shown in Table 1 to 1 weight ratio of pure copper powder with an average particle size of 150 μm manufactured by the water atomization method having the characteristics shown in Table 1, and mix thoroughly. , diameter 10mm, length 5011
Press-formed into a bar shape of 1111 and heated to 65 in a nitrogen atmosphere.
The temperature was raised to 0°C and sintered for 2 hours.

Table 1 Both ends of the sintered molded bar were polished smooth, a coil was wound, and the magnetic permeability, specific resistance, electrical conductivity, and specific gravity were measured, and the results shown in Table 2 were obtained.

Table 2 From the results shown in Table 2, it can be seen that the formed rod made by dispersing ferrite powder in steel and sintering it has excellent magnetic properties and high electrical conductivity.

Next, since the magnetic material according to the present invention has both magnetic properties and electrical conductivity, it can be used in parts of relays where the magnet part and the conductive part are the same body.We will compare its application examples with parts of conventional relays. and explain.

FIG. 2 is a diagram illustrating the configuration of a part of a conventional relay. When a current flows through the coil 2, the magnetic core 1 magnetizes and attracts the iron core 3. In order to attract the iron core 3, a movable terminal 4 with one end fixed to a support base 8 connects to a fixed terminal 5. The conductive wires 6 and 7 are connected to the fixed terminal 5 by moving in the direction shown in FIG. FIG. 1 is a diagram illustrating the configuration of a part of a relay using a highly conductive magnetic material according to the present invention, in which a current flows through a coil 2 to attract a fixed movable highly conductive magnetic spring 10. is connected to the highly conductive magnetic core 9, and the conducting wires 6 and 7 are electrically connected.

As described above, the configuration of the relay part according to the present invention is simpler than the configuration of the conventional relay part.

Furthermore, although the above-mentioned example is an example of a highly conductive magnetic material sintered and formed using soft ferrite powder, if hard ferrite powder is used as the ferrite powder, highly conductive permanent magnets can also be manufactured. It is possible.

(Effect of the invention) Since ferrite is dispersed in copper or a copper-based alloy, it is a highly conductive magnetic material that has both excellent magnetic properties and high electrical conductivity. It is simple and has a wide range of applications.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a part of a relay using a highly conductive magnetic material according to the present invention, and FIG. 2 is an explanatory diagram of a part of a conventional relay. 2 is a coil, 6 and 7 are conducting wires, 9 is a highly conductive magnetic core, 10
1 is a movable highly conductive magnetic spring, and 11 is a column. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] A highly conductive magnetic material used for magnetic cores or magnets such as electromagnets, which is characterized by being formed by dispersing ferrite in copper or a copper-based alloy.