JPS58108707A - Rare earth permanent magnet material - Google Patents
Rare earth permanent magnet materialInfo
- Publication number
- JPS58108707A JPS58108707A JP56207183A JP20718381A JPS58108707A JP S58108707 A JPS58108707 A JP S58108707A JP 56207183 A JP56207183 A JP 56207183A JP 20718381 A JP20718381 A JP 20718381A JP S58108707 A JPS58108707 A JP S58108707A
- Authority
- JP
- Japan
- Prior art keywords
- rare earth
- iron oxide
- permanent magnet
- phase
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
Abstract
Description
【発明の詳細な説明】
本発明は、サマリウム・コバルト磁石を代表とする希土
類と遷移金属との金属間化合物からなる焼結型の希土類
永久磁石材料に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sintered rare earth permanent magnet material made of an intermetallic compound of a rare earth and a transition metal, typified by samarium-cobalt magnets.
希土類元素およびイツトリウムをＲとし、遷移金属をＴ
で表わすとき、永久磁石材料としては、ＴはＣｏ、ある
いはＣｏの一部を他の遷移金属１例えばＦｅ 、 Ｍｎ
、 Ａｔ 、 ＮｉあるいはＣｕで置換したものが一
般的に用いられている。またＲとしては１代表的なもの
としてＳｍがある。Rare earth elements and yttrium are R, transition metals are T
When expressed as a permanent magnet material, T is Co, or a part of Co is replaced with other transition metals 1 such as Fe, Mn
, At, Ni or Cu are generally used. A typical example of R is Sm.
一方、希土類と遷移金属、特にＣＯとの合金形態には、
ＲＣｏ５ 、 Ｒ２Ｃｏ、７ 、 Ｒ２Ｃｏ７． Ｒ
Ｃｏ５． ＲＣｏ２等がある。このうち高い磁気特性の
磁石材としては。On the other hand, in the alloy form of rare earths and transition metals, especially CO,
RCo5, R2Co,7, R2Co7. R
Co5. There are RCo2 etc. Among these, it is a magnet material with high magnetic properties.
ＲＣｏ５．およびＲ２Ｃｏ、７系が用いられる。これは
ＲとＣｏの量を調整することによって得られる。RCo5. and R2Co, 7 series are used. This can be obtained by adjusting the amounts of R and Co.
前述のようにＣｏの一部を他の遷移金属で置換したもの
も良く用いられている。As mentioned above, materials in which a part of Co is replaced with other transition metals are also often used.
本発明は、このよりなＲＴ、あるいはＲ２Ｔｌヮで表わ
される焼結型の希土類永久磁石の磁気特性を改善すると
ともに特性のバラツキを改善することを目的とする。The present invention aims to improve the magnetic properties of a sintered rare earth permanent magnet represented by RT or R2T1, and also to improve the variation in properties.
本発明は、 ＲＴ５あるいはＲ２Ｔ１７で表わされる希
土類磁石合金中にＦｅ２Ｏ３やＦｅ０ＯＨなどの鉄の酸
化物１１ｗｔ％以下含有させたものである。In the present invention, iron oxides such as Fe2O3 and Fe0OH are contained in a rare earth magnet alloy represented by RT5 or R2T17 in an amount of 11 wt% or less.
鉄酸化物の添加が１ｗｔ％以下では、残留磁束密度Ｂｒ
、保磁力ＢＨＣともに向上するので、磁気エネルギー積
（ＢＨ）ｍａｘも向上するが、１ｗｔ％を越えると、添
加効果は認められ々い。When the addition of iron oxide is 1 wt% or less, the residual magnetic flux density Br
Since the coercive force BHC and coercive force are both improved, the magnetic energy product (BH) max is also improved, but if the amount exceeds 1 wt%, the effect of addition is hardly recognized.
次に実施例について詳細に説明する。Next, examples will be described in detail.
Ｓｍ ２６ｗｔ％、 Ｃｕ ９ｗｔ％、 Ｆｅ １５ｗ
ｔ％、 Ｚｒ １．５ｗｔ％。Sm 26wt%, Cu 9wt%, Fe 15w
t%, Zr 1.5wt%.
Ｔｉ ０１ｗｔ％、および残部Ｃｏとなるように原料を
調整し、アルゴンガス雰囲気中で高周波加熱により溶解
して２合金インゴソトヲ得た。この合金を粗粉砕した後
、ボールミルで平均粒径４μｍ程度に微粉砕した。この
粉末に、平均粒径ｏ５μｍ５μｍ程ｅ２０３（酸化鉄）
および０．３μｍ程度のＦｅ０ＯＨ（ゲータイト）を、
それぞれ０〜１．５ｗｔ％の範囲で混合した。この混合
粉末を公知の方法で焼結処理した。即ち、 １０ＫＯ
ｅ程度の磁場中にて、１．５ｔｏｎ４２の圧力で加圧成
形し、この成形物をアルゴン雰囲気中で、 １２１０℃
で、１時間焼結した後。The raw material was adjusted to contain 01 wt% Ti and the balance Co, and was melted by high frequency heating in an argon gas atmosphere to obtain a two-alloy ingot. This alloy was coarsely pulverized and then finely pulverized in a ball mill to an average particle size of about 4 μm. To this powder, e203 (iron oxide) with an average particle size of o5μm and about 5μm is added.
and Fe0OH (goethite) of about 0.3 μm,
Each was mixed in a range of 0 to 1.5 wt%. This mixed powder was sintered using a known method. That is, 10KO
Pressure molded at a pressure of 1.5 tons42 in a magnetic field of about
So, after sintering for 1 hour.
１１８０℃で１時間溶体化処理し、急冷しだ。この焼結
体を８００°Ｃで１時間熱処理した後、５℃／分以下の
冷却速度で６００℃迄冷却した。こうして得た試料の磁
気特性＋ Ｂｒ、 ＢＨｃ＋ （ＢＨ）ｍａＸを図に示
す。図において１曲＠ＡはＦｅ２Ｏ３添加１曲線ＢはＦ
ｅ ＯＯＨ添加の場合をそれぞれ示す。Solution treatment was carried out at 1180° C. for 1 hour, followed by rapid cooling. This sintered body was heat treated at 800°C for 1 hour, and then cooled to 600°C at a cooling rate of 5°C/min or less. The magnetic properties +Br, BHc+ (BH)maX of the sample thus obtained are shown in the figure. In the figure, 1 song @A is Fe2O3 addition 1 curve B is F
e The case of OOH addition is shown.
同図から、鉄酸化物１ｗｔ％以下の添加で、Ｂｒ。From the same figure, it can be seen that when 1 wt% or less of iron oxide is added, Br.
ＢＨＣ、（ＢＨ） ｍａｘともに改善されることがわか
る。It can be seen that both BHC and (BH) max are improved.
なお上記実施例では、 Ｓｍ２Ｃｏ、□系の磁石であり
、 Ｃｏの一部分ＣｕとＦｅで置換し、 ＺｒとＴｉを
添加したものに、鉄酸化物を添加した場合について示し
たが、他の置換物や添加物を用いたＳ ｍ ２ （−０
１７系や、捷たＳｍＣｏ５系磁石におイテモ。In the above example, a Sm2Co, □-based magnet is shown, in which part of Co is replaced with Cu and Fe, and Zr and Ti are added, and iron oxide is added, but other substitutes may also be used. S m 2 (-0
It is suitable for 17 series magnets and SmCo5 series magnets.
鉄酸ｔヒ物の添加による同様の効果が認められた。A similar effect was observed with the addition of ferric acid and arsenic.
このような鉄酸化物の添加による効果は９次の理由によ
るものと思われる。This effect of adding iron oxide is believed to be due to the following reason.
希土類元素、特にザマリウムは酸化しやすいので、焼結
磁石中に希土類元素の酸化物が存在することは避けられ
ない。一方、この希土類元素の酸化物の存在は、磁石特
性を悪くするので。Since rare earth elements, especially zamarium, are easily oxidized, the presence of rare earth element oxides in the sintered magnet is unavoidable. On the other hand, the presence of rare earth element oxides deteriorates magnetic properties.
従来はその発生を極力抑えようとしていた。しかしなが
ら、特公昭５４−１３８４８に示されるとおり１希土類
元累の酸化物が存在しても、希土類元素が金属として所
定量存在すれば、磁気特性は高く維持される。同様の効
果が２本発明による鉄酸化物の添加によって達成されて
いるもの３−
と考えられる。即ち、添加した鉄酸化物はＲＴ。In the past, efforts were made to suppress this occurrence as much as possible. However, as shown in Japanese Patent Publication No. 54-13848, even if an oxide of one rare earth element is present, as long as a certain amount of the rare earth element is present as a metal, the magnetic properties are maintained high. It is believed that a similar effect has been achieved by the addition of iron oxide according to the present invention. That is, the added iron oxide is RT.
相あるいはＲ２Ｔ、□相に固溶体として存在し、希土類
金属との間で酸化還元反応を起し、希土類金属の量が調
整されるものと考えられる。この結果、磁気特性の改善
とバラツキの改善がなされる。It is thought that it exists as a solid solution in the phase, R2T, and □ phase, and causes an oxidation-reduction reaction with the rare earth metal to adjust the amount of the rare earth metal. As a result, magnetic properties and variations are improved.
もちろん、 ＲＴ５相やＲ２Ｔ１７相に固溶した鉄酸化
物が磁性を有することによっても、 ＲＴ５磁石。Of course, the iron oxide dissolved in the RT5 phase and R2T17 phase has magnetic properties, making it an RT5 magnet.
Ｒ２Ｔ１７磁石の磁気特性が向上するものと考えられる
。It is believed that the magnetic properties of the R2T17 magnet are improved.
なお本発明において、 、 ＲＴ５系あるいはＲ２Ｔ１
□系の金属間化合物の組成は化学量論的な値と同じか、
あるいは希土類金属が多少富んだものであることが好ま
しい。In the present invention, RT5 series or R2T1
□Is the composition of the intermetallic compounds in the system the same as the stoichiometric value?
Alternatively, it is preferable that it be somewhat rich in rare earth metals.
図は９本発明による鉄酸化物添加量と残留磁束密度Ｂｒ
、保磁力ＢＨＣ，エネルギー積（ＢＨ）ｍａｘとの関係
を鉄酸化物の種類に応じて示したグラフである。
代理人（７１２７）弁理士後藤洋介
４−
添加量（Ｗｔ、’／ｌ）The figure shows the amount of iron oxide added and the residual magnetic flux density Br according to the present invention.
, coercive force BHC, and energy product (BH) max according to the type of iron oxide. Agent (7127) Patent attorney Yosuke Goto 4- Addition amount (Wt, '/l)
Claims (1)
リウムおよび希土類元素、Ｔは遷移金属を表わす。）で
表わされる希土類磁石合金に鉄酸化物ｉＩｗｔ係以下含
有させたことを特徴とする希土類永久磁石材料。1. A rare earth permanent magnet material, characterized in that a rare earth magnet alloy represented by RT or R2Tl7 (where R represents yttrium and a rare earth element, and T represents a transition metal) contains less than iIwt iron oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56207183A JPS58108707A (en) | 1981-12-23 | 1981-12-23 | Rare earth permanent magnet material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56207183A JPS58108707A (en) | 1981-12-23 | 1981-12-23 | Rare earth permanent magnet material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58108707A true JPS58108707A (en) | 1983-06-28 |
| JPH0252411B2 JPH0252411B2 (en) | 1990-11-13 |
Family
ID=16535614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56207183A Granted JPS58108707A (en) | 1981-12-23 | 1981-12-23 | Rare earth permanent magnet material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58108707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157329A2 (en) * | 1984-03-30 | 1985-10-09 | Union Oil Company Of California | PrCo5-containing magnets |
-
1981
- 1981-12-23 JP JP56207183A patent/JPS58108707A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0157329A2 (en) * | 1984-03-30 | 1985-10-09 | Union Oil Company Of California | PrCo5-containing magnets |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0252411B2 (en) | 1990-11-13 |
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