JPS5884177A - Oxide magnetic material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Ni--Mn--Zn thread oxide magnetic material for use in low-loss transformers, which has a small crystal grain size and a high electrical resistance.

In general, Mi-Mn-Zn filamentous magnetic materials are often used for high frequency applications. The properties required in this case include magnetic permeability, coercive force, electrical resistance, Curie temperature, etc., but the particularly desired property for materials for low-loss transformers is eddy current resistance since they operate at high frequencies.

Therefore, in the present invention, we investigated the composition and used P4, a -Mn-Zn-based oxide, which has a small crystal grain size and a high electric resistance. /J magnetic material was obtained. That is, the gist of the present invention is that nickel oxide (N10) 5 to 40 mol%,
Manganese oxide (MnO) 5-40 mol%, zinc oxide (
ZnO) 5-30 mol%, iron oxide (IF@m011)
48-60 mol% and calcium oxide (Oak) α
01-43wt%, silicon dioxide (Sill) 00
1~) Jwt%, the crystal grain size is 1
The object of the present invention is to provide a hybrid magnetic material for use in a transformer, which is small in size, 5 μm or less, and has a large electrical resistance, 10 sΩ·min or more, and has a low loss.

The present invention will be explained in detail below with reference to Examples.

Example 1 1110: 20 mol%, MnO27 mol%, 2
m01212 mol%,]! '8*0 error: 51 mol% and OaO α05wt%, '5ins 001-82
NipSMnOOl s, Zn0 so that wt%
SFe Oa, Oaoog, 810 m were weighed and mixed. After mixing, the mixture was calcined at 700-1200 t:', finely pulverized, compressed and fired at 1250-1450 C. Table 1 shows the results of various properties of the resulting fired sample.

As is clear from the above examples, the oxide magnetic material of the present invention can reduce transformer loss by decreasing and increasing the crystal grain size and electrical resistance when O&O and 5ins are not included, respectively. . Also S
When ign is contained in an amount of α2wt% or more, the sinterability deteriorates and at the same time the loss of the transformer increases. Therefore 51
0m needs to be 02wt% or less.

Example 2 MlO: 14 mol%, Mno=11 mol/I/%, zn
o: 25% Le%, Fe2O,: 50 mol% and Sigh α01wt%, o&o 001-41wt
%, a sample was prepared in the same manner as in Example 1,
The characteristics of the material were measured. The measurement results are shown in Table 2.

As is clear from the Examples in Table 2' and above, it can be seen that the loss of the transformer is reduced by making the crystal grain size small and increasing the electrical resistance as in Example 1.

Example 3 NiO: 19 mol%, MnO mol% 5ZnO2
3-E-/k%, 1hsOs: 51%, 81C1s: 0.01wt%, OaO: αQI Kiriu Akira wt, in the same manner as in Example 1. + was created and its characteristics were measured. The measurement results are shown in Table 3.

As is clear from the Examples shown in Table 3 and above, as in Example 1.2, the loss of the transformer is reduced by decreasing the crystal grain size and increasing the electrical resistance.

As mentioned above, Flesha! 48-60 mol%%
MnO: 5 to 40 mol%, NiO: 5 to 40 mol%, OaO: 5 to 30 mol%, and OaO: 83 wt%, 81
0. It is possible to reduce the loss of the transformer by making the crystal grain size as small as 15 .mu.m or less and having a large electrical resistance of 10" .OMEGA..mu. or more. Therefore, the material used in the present invention is an oxide magnetic material useful for low-loss transformers.

In addition, in the present invention, the above 0&0 is a raw material that decomposes to become 0&0, such as UOaOOa, 0a(OH) trout, Oa
OmOa, 0a(OHsooo)*HsO has the same effect.

Procedural amendment (voluntary) ++; (□15; 1 tp, all l,'? Chief of the correction agency self-beating, 1 police officer f'l's chisel demonstration 1982 Patent application No. 181449 Shij - person who does sodeichi) B fil i50!11)” i Ritsu Metal Co., Ltd. Substitute Norio Kono J Ko Person Group 111 Marunouchi 2J, Chiyo 111-ku, Tokyo 2J, 1
Contents of subject amendment of No. 2 Putun 1 The description in the “Detailed description of the invention” column of 194m*
Click the button below to make a correction.

Note (1) “001wt%” on line 15 of item 4 of the specification is corrected to “αoawt4J.”

(2) “α01 Shizuku 1” on the same page in the same book as “α1~α”
Corrected to 3.

that's all

Claims (1)

[Claims] Fe1O+1: 48-60, MnO: 5-40.
1iio: δ~40, ZnO: 5~30 mol% and OaO at α01AQ3vt%, 810. α01～α
In a composition consisting of 2 wt%, the crystal grain size is 15 μm or more. An oxide magnetic material for a low-loss transformer, which is characterized by reducing the loss of a transformer by increasing the electric resistance to 1010·1 or more.