JPS5940501A - Carbon-containing permanent magnet - Google Patents
Carbon-containing permanent magnetInfo
- Publication number
- JPS5940501A JPS5940501A JP57149157A JP14915782A JPS5940501A JP S5940501 A JPS5940501 A JP S5940501A JP 57149157 A JP57149157 A JP 57149157A JP 14915782 A JP14915782 A JP 14915782A JP S5940501 A JPS5940501 A JP S5940501A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- tar
- grains
- carbon
- sintered
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract 7
- 229910052799 carbon Inorganic materials 0.000 title claims abstract 7
- 239000000463 material Substances 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 16
- 239000006185 dispersion Substances 0.000 claims abstract description 11
- 239000000696 magnetic material Substances 0.000 claims abstract description 5
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 4
- 239000011230 binding agent Substances 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 12
- 230000035699 permeability Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 3
- 239000002245 particle Substances 0.000 description 24
- 239000004793 Polystyrene Substances 0.000 description 9
- 229920002223 polystyrene Polymers 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 6
- 239000010410 layer Substances 0.000 description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000007771 core particle Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、タールまたは合成樹脂を含むタールと永久磁
石とを混合した永久磁石に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a permanent magnet obtained by mixing tar or tar containing a synthetic resin with a permanent magnet.
従来、ゴム磁石またはプラスチック磁石として知られて
いるものは、永久磁石粒をゴム中に分散させて形成させ
たものをゴム磁石と呼び、永久磁石粒とポリスチレン、
ポリクロピレン、ナフタレン、アントラセンまたはこれ
らの混合組成物粒とを混合して形成させたものを、樹脂
磁石まだはプラスチック磁石と呼んでいる。これらは、
永久磁石粒は本来の形状を維持し、粒間をゴムまたは合
成樹脂を充填物として接着させたものである。これらに
比較し、よシ高い温度で使用することができ、磁性体粒
の単位容積当夛の充填率を高め、結合剤の使用量を減少
させ且つ結合剤層によっても永久磁石単体の焼結体のも
つ磁気的性質の低下が少ないものに形成することが容易
であυ、切断、切削、成形などの加工が容易であるもの
を得ることが求められてきた。これらの求められている
ものが達成されると、予め製造しておいた永久磁石粒か
ら成る分散接着体または磁性体粒を、使用時に、任意に
接着して使用することができ、低コストで得られ、磁界
中でもその影響が少ない状態で形成するととができる。Conventionally known as rubber magnets or plastic magnets, those formed by dispersing permanent magnet particles in rubber are called rubber magnets, and permanent magnet particles, polystyrene,
A resin magnet formed by mixing polychloropylene, naphthalene, anthracene, or a mixture of these particles with grains is called a resin magnet. these are,
Permanent magnet grains maintain their original shape and have rubber or synthetic resin filled in between the grains and adhered thereto. Compared to these, it can be used at higher temperatures, increases the filling rate of magnetic particles per unit volume, reduces the amount of binder used, and even sinters a single permanent magnet with a binder layer. There has been a demand for a material that can be easily formed into a material with little deterioration in its magnetic properties, and that can be easily processed by cutting, cutting, molding, etc. If these requirements are achieved, the dispersion adhesive or magnetic particles made of pre-manufactured permanent magnet particles can be arbitrarily bonded and used at low cost. It can be formed in a state where the influence of the magnetic field is small.
本発明は、前記の欠点を解決し、結合剤使用量が少なく
、形成体中の気泡の存在が少なく、耐熱性に富んだ安コ
ストの磁性体粒の結合磁性体の提供を目的とする。本発
明は、この目的を達成するために、磁性体粒１を結合剤
の全部または一部としてタールを用い、高導磁率材粒３
を混合した組成物を結合剤充填層２を形成するようにす
るり次に、本発明を、一実施例を示して説明する。The object of the present invention is to solve the above-mentioned drawbacks, and to provide a low-cost bonded magnetic material of magnetic material grains that uses a small amount of binder, has few air bubbles in the formed body, is highly heat resistant, and has high heat resistance. In order to achieve this object, the present invention uses tar as all or a part of the binder for the magnetic material particles 1, and the high magnetic permeability material particles 3
Next, the present invention will be explained by showing one example.
実施例 １
サマリウム・コバルト（Ｓｍ２ Ｃｏ １７ ）粒によ
る。この永久磁石に対し、予め８０℃に保った結合剤と
してのタール６ ｖｏ１％の中に、この永久磁石粒を添
加混入し、よく混合しながら加にνシし、１８０’Ｃで
３時間の焼結し、気孔などの間隙のない中実の焼結体を
得た。この材料は、磁界を加えないで行ったときは１６
．６ＭＧＯで、磁界を加え°〔行ったときは１８．８Ｍ
ＧＯとなった。Example 1 Using samarium cobalt (Sm2 Co 17 ) grains. To this permanent magnet, the permanent magnet particles were added to 1% tar 6 vol. as a binder, which was kept at 80°C in advance, and stirred while thoroughly mixing, and heated at 180°C for 3 hours. A solid sintered body without voids such as pores was obtained by sintering. This material is 16 when done without applying a magnetic field.
．． Apply a magnetic field with 6MGO [18.8M when done]
It became GO.
これに対し、常法で前記の永久磁石粒を、ポリスチレン
を用いて焼結したときけ結合剤の量が約２倍の１２係を
必要とし、これを焼結した実体材料は、磁石粒の充填率
が低く、ポリスチレン揮発成分による発泡気孔が多く、
ポリスチレンの性質にも支配され、結合剤層の合計厚さ
が約２倍となシ、接着力が劣り、加工性が悪く、耐熱性
はポリスチレンの特質に従す弱く、磁気特性は１４ＭＧ
Ｏに低下した。On the other hand, when the permanent magnet grains are sintered using polystyrene using the conventional method, the amount of the binder is approximately twice as large as the 12%, and the actual material made by sintering this binder is the same as the magnet grains. The filling rate is low and there are many foamed pores due to polystyrene volatile components.
It is also dominated by the properties of polystyrene, and the total thickness of the binder layer is about twice as large, the adhesive strength is poor, the processability is poor, the heat resistance is weak according to the characteristics of polystyrene, and the magnetic properties are 14MG.
It decreased to O.
実施例 ２
永久磁石として、特性が、Ｈｃ ８８０００ｅ 、 Ｂ
ｒ ７８００Ｇで、ＭＧＯ２３のものを用いた。この永
久磁石の直径約０．３〜０．５朋φの粒に対し５ ｖｏ
／？係の二種のタール結合剤を用いた。Example 2 As a permanent magnet, the characteristics are Hc 88000e, B
r 7800G and MGO23 was used. 5 vo for a particle with a diameter of about 0.3 to 0.5 mm of this permanent magnet
/? Two types of tar binders were used.
一つは、タールだけのものと、他はタールに対し鉄のよ
うな高導磁率材の微ｔ１２０ミクロンのもの６ ｖｏｒ
％ （以下、含導磁率材含有タールという）を添加混
合したものである。One is made of tar, and the other is made of a high magnetic permeability material such as iron and has a fine T120 micron 6 vor.
% (hereinafter referred to as magnetically permeable material-containing tar).
タールだけの結合剤を添加し混合したものは、ＭＧＯが
１６であ、った。含導磁率材含有タール接着剤を添加し
混合したものは、ＭＧＯが１８であった。The MGO was 16 when mixed with only tar as a binder. The MGO of the mixture to which the magnetic permeability material-containing tar adhesive was added was 18.
また後者は、Ｈｃ ６６０００ｅ 、 Ｂｒ ７１００
Ｇノ特性に変化した。実施例１の場合と比較して、サ
マリウム・コバルト永久磁石とタールだけから成る材料
の場合に得られたＭＧＯ１６，６と、さらに該材料を磁
界を加えて形成させて成る材料の場合に得られたＭｏｏ
ｌａ、ｓと比較して、いずれも、良好な結果が得られた
。また、含導磁率材含有タール結合剤がもたらす効果が
きわめて良好であることが確認された。The latter is Hc 66000e, Br 7100
Changed to G characteristics. Compared to the case of Example 1, MGO16,6 obtained in the case of a material consisting only of a samarium-cobalt permanent magnet and tar, and that obtained in the case of a material formed by applying a magnetic field to the material. Moo
Good results were obtained in both cases compared to la and s. Furthermore, it was confirmed that the effect brought about by the magnetically permeable material-containing tar binder was extremely good.
実施例 ３
永久磁石として、実施例１に用いた永久磁石と同一のも
・のを用いた。Example 3 The same permanent magnet as that used in Example 1 was used as a permanent magnet.
結合剤としてポリスチレンを用い、このポリスチレンに
、混合物として鉄粒の直径が１００ミクロン以下のもの
を、前記の含高導磁率拐として、６ｖａｔ ％を添加混
合したものを用Ａた。永久磁石に対して、この結合剤を
１０ ｖａｔ％添加混合し１ｏｏｏ ℃で焼結したもの
は、ＭＧＯが１７であった。実施例１と同２の場合に比
較して、結合の、だめの使用量、すなわち永久磁石粒間
を充填する層の厚さが、樹脂の場合は２倍くらいになる
からであろう。Polystyrene was used as a binder, and a mixture of iron particles having a diameter of 100 microns or less and 6 vat % of the above-mentioned high-containing magnetic conductivity was added and mixed to the polystyrene. When a permanent magnet was mixed with 10 vat% of this binder and sintered at 100° C., the MGO was 17. This is probably because the amount of bonding material used, ie, the thickness of the layer filling between the permanent magnet particles, is approximately twice as large as that in Examples 1 and 2 when the resin is used.
結合剤として樹脂の選択例ついて試験をした結果は、樹
脂として、ポリエチレン、ポリプロピレン、ポリスチレ
ン、ナフタレン、ポリブチレン、ポリ塩化ビニール、ア
ントラセン、ポリウレタン、ポリアクリロニトリルの中
から、その用途に応じ、任意に選択して、少なくとも一
種、または二種以上を混合して、添加する鉄粒は、用途
に応じ１〜１５ｖｏ／１の範囲のうちの選択した貝を混
合して、同様な効果がもたらされることを確認した。The results of tests on examples of selecting resins as binders show that resins can be arbitrarily selected from among polyethylene, polypropylene, polystyrene, naphthalene, polybutylene, polyvinyl chloride, anthracene, polyurethane, and polyacrylonitrile, depending on the use. It has been confirmed that the same effect can be obtained by mixing at least one type or two or more types of iron particles, and by mixing selected shellfish in the range of 1 to 15 vo/1 depending on the purpose. did.
実施例 ４
永久磁石粒は、前記の実施例１と同じものを用
“いた。結合剤として、前記の実施例３では合成樹脂に
鉄粒を混合したものをｍ−たが、本実施例ではけ、合成
樹脂とタールと鉄粒混合物を用いた。１〜１５ｖｏ／％
の鉄粒の直径１００ミクロンのものと、ポリスチレンと
アントラセンとの１対１ （ｖｏ／）から成る樹脂粒が
４０〜ＳＱ ｖａｔ係と、タール３０〜４５ｖｏｗ ％
とを混合したものを用ｒ ｆｃ。永久磁石に対して結合
剤は８チ混合した。Example 4 The same permanent magnet particles as in Example 1 were used.
As a binder, a mixture of synthetic resin and iron particles was used in Example 3, but in this example, a mixture of synthetic resin, tar, and iron particles was used. %
iron particles with a diameter of 100 microns, resin particles consisting of 1:1 (vo/1) of polystyrene and anthracene, 40~SQ vat ratio, and tar 30~45vow%.
Use a mixture of r fc. Eight binders were mixed for each permanent magnet.
こうした永久磁石粒と結合剤との混合組成物とから２０
０℃で形成した中実固体を１０００℃焼結したものは、
ＭＧＯ１７であった。From a mixed composition of such permanent magnet particles and a binder,
A solid solid formed at 0°C is sintered at 1000°C,
It was MGO17.
前記の各実施例に用いた結合剤中に添加する高導磁率材
の添加量は、結合剤中に上限を１５ｖｏ／１とすること
が適してｂる。The upper limit of the amount of the high magnetic permeability material added to the binder used in each of the above examples is preferably 15 vo/1.
結合力を高めるためには結合剤を多量に加えるのがよい
が、永久磁石粒間に結合剤を充填すると、磁気特性を劣
化させる。結合剤としてタールを用いるときは、約５
ｖｏ／ ％程度でよい。これより減少すると結合力が低
下する。この５ ｖｏｌ！％の限度を維持して、かつ、
結合剤層中に高導磁率粒を介在させることができる上限
量が１５ ｖｏ／％である。In order to increase the bonding strength, it is better to add a large amount of binder, but if the binder is filled between permanent magnet particles, the magnetic properties will deteriorate. When using tar as a binder, approximately 5
It may be about vo/%. When the amount decreases below this value, the bonding strength decreases. This 5 vol! % limits, and
The upper limit to which high magnetic permeability grains can be interposed in the binder layer is 15 vo/%.
１５ｖｏｌ！１以上にすると結合力が低下する。15vol! When it is 1 or more, the bonding strength decreases.
タールに対し樹脂を結合剤とり、て用いるときの量は、
樹脂のときはタールの倍程度が適当であることが、実験
の結果から確認できた。The amount of resin used as a binder for tar is:
From the results of the experiment, it was confirmed that the appropriate amount for resin is about twice the amount of tar.
すでに説明したように、本発明は、永久磁石の粒、核粒
の分散接着体、該分散接着体の複数のものの積層接着体
または分散接着体を基礎に他の永久磁石粒と他の結合剤
とで他の分散接着体の上に新しい分散接着層を重畳して
形成することが、容易にできる。結合剤として、タール
を、永久磁石の粒に対し約５〜６チ程度を８０〜２００
ｔ：：に加熱して、該タール中に直径１ｏｏミクロン
程度の高導磁率体の粒をタールに対し１〜１５ｖｏＩ！
１を加えて混合したものを形成し、用いるととができる
。結合剤タールの一部を樹脂に置換することもできる。As already explained, the present invention provides a dispersed adhesive body of permanent magnet particles, core particles, a laminated adhesive body of a plurality of the dispersed adhesive bodies, or a dispersed adhesive body based on other permanent magnet particles and other binders. With this method, a new dispersion adhesive layer can be easily formed on top of another dispersion adhesive layer. As a binder, add about 5 to 6 pieces of tar to the grains of the permanent magnet at a rate of 80 to 200
t::, and particles of high magnetic permeability material with a diameter of about 10 microns are added to the tar at 1 to 15 voI!
1 to form a mixture and use it. It is also possible to partially replace the binder tar with a resin.
この置換の量は、タールの割合に対し約２倍の樹脂を用
いる。またタールだけを結合剤として用いる場合は、１
０００℃程度に加熱し焼結することができる。なお、熱
硬化性樹脂をタールと混合して結合剤として用いるとき
は、高温度に加熱して樹脂を分解し分散体を形成するこ
とができる。This amount of substitution uses about twice the amount of resin relative to the proportion of tar. In addition, when using only tar as a binder, 1
It can be sintered by heating to about 000°C. Note that when a thermosetting resin is mixed with tar and used as a binder, the resin can be decomposed by heating to a high temperature to form a dispersion.
このようにして形成する永久磁石分散体を、横方向と縦
方向とに、永久磁石の密度を変えて、例えば永久磁石粒
の直径を、横方向のものを縦方向のものの２倍にするか
、または同一直径の永久磁石粒を横方向に縦方向の２倍
に並列するが、これを任意に選択して形成することがで
きる。In the permanent magnet dispersion formed in this way, the density of the permanent magnets is changed in the horizontal direction and the vertical direction, for example, the diameter of the permanent magnet particles in the horizontal direction is made twice as large as that in the vertical direction. Alternatively, permanent magnet grains of the same diameter are arranged in twice the horizontal direction as in the vertical direction, but this can be arbitrarily selected and formed.
こうし７て形成する永久磁石粒分散体を、外部から磁界
を加えて一定方向の極に粒を並べて形成することができ
る。The permanent magnet particle dispersion thus formed can be formed by applying a magnetic field from the outside and arranging the particles in poles in a certain direction.
本発明の形成された永久磁石分散焼結体は、すでに説明
したように、次の特性を有する。すなわち、第一に、接
着剤層中に高導磁率体の粒を含むから単位磁石粒含有容
積当りの磁気特性が太きく低下しないようにして接着剤
利用をし、きわめて容易に単位磁石粒の充填率を実質的
に高めることができる。第二にタールのような入手が容
易なものを強力な結合剤とし、て用いることができ、低
温だけでなく高温焼結をするととができる。第三に耐高
温分散焼結体を形成することができる。第四に磁界を加
えて焼結することで磁極を一定にするととができる。さ
らに、第五として、この上りに成形したものは、シート
状に積層する仁とができ、また、切断し、成形し、切削
をして、所望の形体を付与する加工ができる。As already explained, the formed permanent magnet dispersed sintered body of the present invention has the following characteristics. Firstly, since the adhesive layer contains grains of high magnetic permeability material, the adhesive can be used in such a way that the magnetic properties per volume containing unit magnet grains do not deteriorate significantly, and the unit magnet grains can be formed very easily. The filling rate can be substantially increased. Second, easily available materials such as tar can be used as strong binders, and can be sintered not only at low temperatures but also at high temperatures. Thirdly, a high temperature resistant dispersion sintered body can be formed. Fourth, by applying a magnetic field and sintering, the magnetic pole can be made constant. Furthermore, fifthly, this upwardly molded material can be laminated into sheets, and can also be processed to give a desired shape by cutting, molding, and cutting.
第１図は、本発明の一実施例の一部拡大組織１ジデル。
１ 永久磁石粒 ２ 結合剤層
３ 有高導磁率粒
特許出願人 株式会社 井上ジャパックス研究所代理
人 弁理士 中 西 −FIG. 1 shows a partially enlarged structure 1 of an embodiment of the present invention. 1 Permanent magnet grains 2 Binder layer 3 High magnetic permeability grains Patent applicant Inoue Japax Institute Co., Ltd. Agent Patent attorney Nakanishi −
Claims (1)
を高め加工可能な耐熱性の含磁性株焼結形成体において
、永久磁石粒と該永久磁石に対し５ｖｏｗ ％オーダー
のタール、タールの一部を該タール被代替量の２倍量の
熱硬化性樹脂に代替したタールと樹脂の混合物を結合剤
として、８０〜２００℃で永久磁石の分散体を形成して
焼結し、該形成体を成形しまたは成形したものを高温焼
成することを／１？徴とした含炭素永久磁石。 ２ 永久磁石粒の形体を維持し単位容積当りの充填率
を高め加工可能な耐熱性の含磁性体焼結形成体において
、混合物に１−１５ｖｏｌ！％の高導磁率体の微細な粒
を添加混合したものを結合剤として、８０〜２００℃で
永久磁石の分散体を形成して焼結し、該形成体を成形し
または成形したものを高温焼成することを特徴とした含
炭素永久磁石。 ３ 高導磁率体の微細な粒として鉄粒を用いる特許請
求の範囲の第２項に記載の含炭素永久磁石。 ４ 組成物を焼結する前に、混合組成物に磁界を加え
て極性を一定にした特許請求の範囲の第１項または第２
項に記載の含炭素永久磁石。[Claims] In a heat-resistant magnetic sintered product that maintains the shape of permanent magnet grains and can be processed by increasing the filling rate per unit volume, the permanent magnet grains are on the order of 5 vol % with respect to the permanent magnet. A permanent magnet dispersion is formed at 80 to 200°C using a mixture of tar and resin in which part of the tar is replaced with a thermosetting resin in an amount twice the amount of the tar to be substituted, and then sintered at 80 to 200°C. /1? A carbon-containing permanent magnet. 2. In a heat-resistant magnetic material sintered body that maintains the shape of permanent magnet grains, increases the filling rate per unit volume, and can be processed, the mixture contains 1-15 vol! % of fine grains of high magnetic permeability material are added and mixed as a binder, a permanent magnet dispersion is formed and sintered at 80 to 200°C, and the formed body is molded or molded at a high temperature. A carbon-containing permanent magnet characterized by being fired. 3. The carbon-containing permanent magnet according to claim 2, in which iron grains are used as the fine grains of the high magnetic conductivity material. 4. Before sintering the composition, a magnetic field is applied to the mixed composition to make the polarity constant.
Carbon-containing permanent magnets described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57149157A JPS5940501A (en) | 1982-08-30 | 1982-08-30 | Carbon-containing permanent magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57149157A JPS5940501A (en) | 1982-08-30 | 1982-08-30 | Carbon-containing permanent magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5940501A true JPS5940501A (en) | 1984-03-06 |
| JPH0416922B2 JPH0416922B2 (en) | 1992-03-25 |
Family
ID=15469031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57149157A Granted JPS5940501A (en) | 1982-08-30 | 1982-08-30 | Carbon-containing permanent magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5940501A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376305A (en) * | 1986-09-18 | 1988-04-06 | Taiyo Yuden Co Ltd | Magnetic powder for plastic magnet or rubber magnet and manufacture thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830092A (en) * | 1971-08-23 | 1973-04-20 |
-
1982
- 1982-08-30 JP JP57149157A patent/JPS5940501A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830092A (en) * | 1971-08-23 | 1973-04-20 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6376305A (en) * | 1986-09-18 | 1988-04-06 | Taiyo Yuden Co Ltd | Magnetic powder for plastic magnet or rubber magnet and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0416922B2 (en) | 1992-03-25 |
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