JPS60184661A - Material for permanent magnet - Google Patents

Abstract

PURPOSE:To improve the characteristics of a permanent magnet such as the saturation magnetization and anisotropic magnetic field by adding a specified amount of Ag to the permanent magnet made of an alloy contg. Fe, B and a rare earth element or further contg. Co. CONSTITUTION:Ag is added to a conventional permanent magnet made of an Fe- B-rare earth element alloy or an Fe-B-Co-rare earth element alloy to obtain a permanent magnet made of an alloy represented by a general formula R(BxAgy Fe1-x-y)A or R(BxAgyCozFe1-x-y)A (where 0.01<=x<=0.3, 0.01<=y<=0.3, 0.01<=z<= 0.98, 4<=A<=16, R is a rare earth element which may be Y). The resulting permanent magnet has high saturation magnetization and a strong anisotropic magnetic field.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a novel permanent magnet material containing rare earth elements.

[Background technology]

Many studies have been carried out on alloy systems consisting of rare earth elements and transition metal elements, and among these, alloy systems consisting of rare earth elements (1) and Co2 have become practical materials today. Specifically, RCOII system and Cu-added IC
It is a 017 series alloy.

On the other hand, several studies have been conducted on compounds or alloys consisting of rare earth elements and Fe, which is more abundant and cheaper than CO as a transition metal element. possibility had been denied.

For example, the highest Curie point in the RFC, ~ sF'eiy series alloys is only 187°C (Gd*F'e17 corresponds), and some materials have also been found that exhibit large values for uniaxial crystal anisotropy. Therefore, it was considered that there was no possibility of it being used as a practical permanent magnet material.

However, in recent years, the addition of boron 0 as
) has been found to be improved and is becoming used as a magnetic material.

This Fe-B-based magnet alloy has a high saturation magnetization of about 10 KG or more, a high anisotropic magnetic field, and a Curie temperature.

Father blend - When CO is added to the gold system, the Tc can be further increased and the temperature characteristics improved.

[Disclosure of the invention]

In order to further expand the possibilities as a permanent magnet material, the present invention further expands the possibilities as a permanent magnet material by adding [Ag] to the above-mentioned alloy system.
It is characterized by an improvement of the phosphorus-Fe-B system and the phosphorus-Fe-Co-B system.

That is, the present invention provides 几-Fe-B-Ag and 11. −
It is related to the Fe-B-Co-Ag system, and if expressed as a composition formula, ψ R(BxAgyFex -x-y)A2(Itanshi,
几 is a rare earth element containing Y La, Ce, Pr, N
d, 8m (one type or combination of two or more types) Q, (1≦X
≦0.5. α01≦y≦0.3.4≦A≦16 ■ R・(BxAg”yCOzF el-x-y-z
)A: (However, it is a rare earth element La1C containing Y.
one type or combination of two or more types of e+ P re Ndt Sm) 0.01≦X≦0.3゜0.01≦y≦0.5,
It is characterized by having a composition of 0.01≦z (0,98, 4≦A≦16).

It has been discovered that such addition of Ag improves the anisotropic magnetic field and saturation magnetization, making it possible to provide a more satisfactory magnetic material. These compositional alloys are crystalline alloys made by casting molten metal obtained by high-frequency melting, arc melting, etc. into a mold or the like.

The reasons for limiting the individual components and component amount ranges in the present invention are as follows. In other words, B view (X) is 0.0
When it is less than 1, the anisotropic magnetic field becomes small. Also, the amount of B is 0.
When it becomes 3 or more, the magnitude of saturation magnetization decreases. Therefore, the amount of B: is 0.01≦X≦0.5, preferably 0.02≦X≦α2#, more preferably 0.02≦x(0
, 15, K shows better characteristics. Ferroboron may be used as this material. Also A
When g1(Y) becomes α3 or more, the magnitude of saturation magnetization decreases. Further, when Ag1ft is less than 0.01, the addition effect disappears in terms of magnetic properties. Therefore, the amount of Ag is [L
01≦y≦0,3, but preferably α01≦y≦(
If L2° is preferably 0.01≦y≦[115, better characteristics will be exhibited. Although the addition of CO is not necessary, the addition of CO increases the Curie temperature. It will be better if the CO addition value (z) is 0.1 or more, preferably 0.05 or more. Also 2 is 0.9
When the value is 8 or more, the magnitude of saturation magnetization decreases. Therefore, 2 becomes α01≦z (0.98, but preferably 0.05
≦2≦0.95, more preferably α05(z(0,6. On the other hand, (13+Ag-1-Fe) or (B
+Ag+Fe+Co) molar ratio (Z) of hl and R(#)
The reason for setting 4≦2≦16 is that when the molar ratio 2 becomes 4 or less, the strength of saturation magnetization decreases, and when the molar ratio 2 exceeds 16, the magnitude of the anisotropic magnetic field decreases.

In this case, preferably 5≦2≦14, more preferably 5≦
When 2≦12, higher values of the anisotropic magnetic field and saturation magnetization can be obtained.

Examples will be shown below.

Example j Nd (Bo, osAgoloFeo, 52
)s alloy was prepared and the physical property value of HA was measured, and the result was about 60 KOe. As a comparison example, N
d(BonsFe o,oz)g and NdFea
An alloy was prepared and measured in the same manner. Nd (Bo, os
P e O,92)s alloy is 50KOe, Nd
Fe5 alloy showed almost no uniaxial chirotropy as HA.

The alloy with added Ag also showed an increase in saturation magnetization of about 7 cm compared to the alloy without the addition of Ag.

From this result, alloys containing Ag are R-Fe-B and I
It can be seen that it has better characteristics compared to the L-Fe type.

Example 2 As in Example 1, Nd (Bo, osAgo
,oy■ゝe o,ss)s and Nd(Bo,
osAgo, x2Feo, sc+)s alloys were created. Almost the same effect as in Example 1, the effect of adding Ag was observed.

Example 5 Nd(Bo, o<Ago, xoFeo, sJ
An alloy of s was prepared and HA was measured as a physical property value, and the result was about 52 KOe. As a comparative example, Nd
(BO,04F e o,ms) a and N
A dFe alloy was prepared and measured in the same manner. Nd (
Bo, osFe 0J2)+! The gold alloy is 25KOe, and the NdFe5 alloy is f (almost 1 itl+ as A).
It showed no anisotropy.

Furthermore, the alloy to which Ag was added showed an increase in saturation magnetization of about 40 mm compared to the alloy without the addition of Ag.

This result shows that the alloy containing Ag has better characteristics than the phosphor-Fe-H and phosphor-Fe systems.

Example 4 Similar to Example 5, Nd (B o, oa A
go, oaP eo, so) a and Nd (
Bo, 04 Ago, os Fe ons) s alloys were created. Similar to Example 1 and baldness, the effect of adding Ag was observed.

Example 5 Nd(Bo, osAgo, toCOo, ts
An alloy of Feo, gy)s, s was created, and the physical properties were H
The measurement result for A was approximately 65 KOe.

As a comparative example, Nd (Bo, osCoo, tsF
e 0.77) An alloy of 11.5 was prepared and measured in the same manner. Nd (B o, osco o, ssF e o, y
y) s,s alloy had HA = 52 KOe.

As can be seen from this result, the effect of Ag is clear.

In addition, as the rare earth element R, Yr La, Ce+ Pro
A similar effect of Ag addition is also shown when using one type of Sm or a combination of two or more types of Sm and a combination with Nd.

Patent Applicant Procedures Amendment Document March 1982 To the Commissioner of the Patent Office, Patent Application (2) 2, filed on March 1, 1980, Name of invention Material for permanent magnet & Relationship with tenancy of person making amendments Patent Applicant address No. 1, Nihonbashi-chome-13, Chuo-ku, Tokyo Name (3)
06) TDC Co., Ltd. 5, B of the invention increased by Sode Masa.

5. Contents of amendments to Feature W1 of the specification to be amended, 41 ft+ of claims, and Kusunoki I of the detailed description of the invention (1) The scope of the claims will be amended as a separate sheet.

(2) Page 6, line 17 c) “La, Ce,
Pr.

Nd, 8m Delete the sentence J.

(3) “La, Ce, Pr,” on page 4, line 1 of the specification
Nd.

Delete the sentence SmJ.

(4) Clear all 15th 8th negative 1st line f) “Y, L
a, Ce, Pr.

Insert the following sentence after the SmJ sentence.

", Eu, Gd, Tb, Dy, Ho, Er
, Tm, Yb, Lu J Claim (1)■also(BxAgyFel-x-y)A (However, 0.01≦X≦0.3, 0.01≦y≦0.5.4≦
A material for a permanent magnet, characterized in that it is represented by the compositional formula A≦16), and in the compositional formula, R is one type or a combination of two or more types of rare earth elements including Y.

(2) l too (B xA g y COz p el-x
, , ) person<Tatashi001≦X≦0.5,0.01≦
y≦0.3, 0.01≦z (0,98, 4≦A≦16)
1. A permanent magnet material represented by the following compositional formula, wherein 9 is one or a combination of two or more rare earth elements including Y.

Claims (2)

[Claims] (1) 几(HxAgyFex -X-y) A (However, 0 mouth 1≦X≦0.3, 0.01≦y≦0.3.4≦A
≦16), and in the above composition formula, 几 is a rare earth element containing Y.
A material for a permanent magnet, characterized in that it is one type or a combination of two or more of cL Sm. (2) , JBxAgyCozFex-x-y-z)
A (provided that L01≦X≦0.3, 0.01≦y≦o,
It is represented by the composition formula s, o, oi≦z (Q, 98. 4≦A≦16), and in the above composition formula, rare earth elements LH+Ce, Pr, containing R4j, Y,
A permanent magnet material comprising one or a combination of two or more of Nd and Sm.