JPS6324607A - Rare earth bonded magnet - Google Patents
Rare earth bonded magnetInfo
- Publication number
- JPS6324607A JPS6324607A JP61166619A JP16661986A JPS6324607A JP S6324607 A JPS6324607 A JP S6324607A JP 61166619 A JP61166619 A JP 61166619A JP 16661986 A JP16661986 A JP 16661986A JP S6324607 A JPS6324607 A JP S6324607A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- rare earth
- magnet
- fine powder
- powder
- 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
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 30
- 150000002910 rare earth metals Chemical group 0.000 title claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 32
- 239000011347 resin Substances 0.000 claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 21
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 21
- 229920001721 polyimide Polymers 0.000 claims abstract description 18
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 17
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 230000003647 oxidation Effects 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 239000009719 polyimide resin Substances 0.000 claims description 16
- 238000002156 mixing Methods 0.000 abstract description 10
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002002 slurry Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000004642 Polyimide Substances 0.000 abstract 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 description 13
- 229920000647 polyepoxide Polymers 0.000 description 13
- 239000006247 magnetic powder Substances 0.000 description 7
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 5
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 description 5
- 238000000748 compression moulding Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229920003192 poly(bis maleimide) Polymers 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 2
- 241000723346 Cinnamomum camphora Species 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- 229960000846 camphor Drugs 0.000 description 2
- 229930008380 camphor Natural products 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- RGJOEKWQDUBAIZ-IBOSZNHHSA-N CoASH Chemical compound O[C@@H]1[C@H](OP(O)(O)=O)[C@@H](COP(O)(=O)OP(O)(=O)OCC(C)(C)[C@@H](O)C(=O)NCCC(=O)NCCS)O[C@H]1N1C2=NC=NC(N)=C2N=C1 RGJOEKWQDUBAIZ-IBOSZNHHSA-N 0.000 description 1
- 101100390711 Escherichia coli (strain K12) fhuA gene Proteins 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、耐熱性および耐酸化性のすぐれた希土類ボ
ンド磁石に関するものでちる。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rare earth bonded magnet with excellent heat resistance and oxidation resistance.
一般に、ボンド磁石は、焼結磁石に比べ、磁気特性では
劣るにもかかわらず、物理的強度にすぐれ、かつ形状の
自由度が高いなどの理由から、近年その利用範囲を急速
に広げつつある。In general, although bonded magnets are inferior in magnetic properties to sintered magnets, their range of use has been rapidly expanding in recent years due to their excellent physical strength and high degree of freedom in shape.
また、ボンド磁石には、圧縮成形タイプ、射出成形タイ
プ、および押出成形タイプがあるが、中でも圧縮成形タ
イプのものは、磁性粉末を高充填できるため、比較的高
い磁気特性が得られることから注目されている。In addition, there are compression molding types, injection molding types, and extrusion molding types of bonded magnets, but the compression molding type is attracting attention because it can be filled with a high amount of magnetic powder and has relatively high magnetic properties. has been done.
さらに、この圧縮成形タイプのボンド磁石は、有機バイ
ンダとして、金属との接着性にすぐれたエポキシ樹脂を
用い、磁性粉末と液状のエポキシ樹脂とを均一に混合し
た後、磁場成形するか、あるいは磁性粉末を磁場成形し
てから液状エポキシ樹脂を含浸させ、ついで前記エポキ
シ樹脂を加熱硬化するかの方法によって製造されている
。Furthermore, this compression molding type bonded magnet uses an epoxy resin with excellent adhesion to metal as an organic binder, and after uniformly mixing magnetic powder and liquid epoxy resin, it is molded in a magnetic field or It is manufactured by a method of magnetically molding powder, impregnating it with liquid epoxy resin, and then heating and curing the epoxy resin.
しかし、有機バインダとしてエポキシ樹脂を用いて製造
した希土類Ｒンド磁石においては、（ａ） 上記エポ
キシ樹脂は、希土類合金微粉末に対するぬれ性、および
ガスシールド性が十分でないために、希土類合金微粉末
自体が非常に酸化され易いものであることと合まって、
磁石の使用条件によっては酸化が発生し、磁気特性が損
なわれるようになることから、前記希土類合金微粉末に
対して前工程として耐酸化被膜処理を施すことが必要で
あること。However, in rare earth R-shaped magnets manufactured using epoxy resin as an organic binder, (a) the epoxy resin has insufficient wettability and gas shielding properties for the rare earth alloy fine powder; Coupled with the fact that it is very easily oxidized,
Depending on the usage conditions of the magnet, oxidation occurs and the magnetic properties are impaired, so it is necessary to apply an oxidation-resistant coating treatment to the rare earth alloy fine powder as a pre-process.
（ｂ） エポキシ樹脂が耐えられる温度はせいぜい１
５０℃程度であり、したがって希土類合金微粉末がこれ
以上の温度に耐えられても、磁石としては、その使用温
度範囲が狭く、かつ低いものとならざるを得ないこと。(b) The temperature that epoxy resin can withstand is at most 1
The temperature is about 50°C, and therefore even if the rare earth alloy fine powder can withstand temperatures higher than this, the operating temperature range as a magnet is narrow and low.
以上（ａ）およびの）に示される問題点がある。There are problems shown in (a) and (2) above.
そこで、本発明者は、上述のような観点から、耐酸化性
および耐熱性のすぐれた希土類ゼンド磁石を得べく、特
に有機バインダについて研究を行なった結果、有機バイ
ンダとして、エポキシ樹脂に代って、熱硬化型ポリイミ
ド系樹脂を用いると、この熱硬化型ポリイミド系樹脂は
、エポキシ樹脂に比して、長期耐熱性温度が５０°Ｃ以
上も高いことから、それだけ磁石の耐熱性が向上するよ
うになり、さらに機械的強度、ぬれ性、およびガスシー
ルド性にもすぐれているので、バインダの配合割合を相
対的に減らすことができるようになることから、磁性粉
末の高密度化が可能となシ、高い磁気特性が得られるよ
うになるばかシでなく、磁性粉末に対する耐酸化被膜処
理を必要としないで、すぐれた耐酸化性を得ることがで
きるようになるという知見を得たのである。Therefore, from the above-mentioned viewpoint, the inventor of the present invention conducted research on organic binders in particular in order to obtain rare earth Zend magnets with excellent oxidation resistance and heat resistance. If thermosetting polyimide resin is used, the long-term heat resistance temperature of thermosetting polyimide resin is 50°C or more higher than that of epoxy resin, so the heat resistance of the magnet will be improved accordingly. In addition, it has excellent mechanical strength, wettability, and gas shielding properties, making it possible to relatively reduce the blending ratio of binder, making it possible to increase the density of magnetic powder. Furthermore, we have found that it is possible to obtain excellent oxidation resistance without the need for oxidation-resistant coating treatment on the magnetic powder, rather than simply obtaining high magnetic properties.
この発明は、上記知見にもとづいてなされたものであっ
て、希土類合金微粉末を有機バインダで結合してなる希
土類ゼンド磁石において、前記有機バインダとして、熱
硬化型ポリイミド系樹脂、または熱硬化型ポリイミド系
樹脂を３０重量％以上含有する混合樹脂を用い、かつこ
れらの樹脂を前記希土類合金微粉末に対して１〜５重量
％の割合で配合することによって耐熱性および耐酸化性
を向上せしめた希土類ダンド磁石に特徴を有するもので
ある。The present invention has been made based on the above knowledge, and provides a rare earth Zend magnet formed by bonding rare earth alloy fine powder with an organic binder, in which the organic binder is a thermosetting polyimide resin or a thermosetting polyimide resin. A rare earth material with improved heat resistance and oxidation resistance by using a mixed resin containing 30% by weight or more of a system resin and blending these resins at a ratio of 1 to 5% by weight with respect to the rare earth alloy fine powder. This is a characteristic of Dando magnets.
なお、この発明の磁石において、有機バインダとじて混
合樹脂を用いる場合には、熱硬化型ポリイミド系樹脂を
３０重量％（以下チは重量％を示す〕以上含有したもの
を用いるが、これは熱硬化型ポリイミド系樹脂の含有量
が３０％未満では、磁石に所望のすぐれた耐熱性および
耐酸化性を確保することができないからであり、またこ
の場合熱硬化型ポリイミド系樹脂以外の樹脂としては、
硬化の際に水やアルコールを発生しない付加重合り゛イ
ゾの樹脂を用いるのが望ましく、一般的には、例えば従
来有機バインダとして用いられているエポキシ樹脂の７
０％以上を熱硬化型ポリイミド系樹脂で置換した状態で
用いられるものである。In addition, in the case of using a mixed resin as an organic binder in the magnet of the present invention, one containing 30% by weight or more of a thermosetting polyimide resin is used. This is because if the content of the curable polyimide resin is less than 30%, it is not possible to ensure the desired excellent heat resistance and oxidation resistance in the magnet, and in this case, as the resin other than the thermosetting polyimide resin, ,
It is desirable to use an addition polymerization resin that does not generate water or alcohol during curing.
It is used in a state in which 0% or more of the resin is replaced with thermosetting polyimide resin.
また、この発明の磁石において、有機バインダの配合割
合を１〜５％と限定したのは、その割合が１％未満では
、十分な機械的強度を確保することができないばかりで
なく、磁石成形時の抱き込み空気によって磁性′粉末の
酸化が著しく促進されるようＦなり、一方その割合が５
％に越えると、磁性粉末の充填塵が低下するようになり
、磁気特性の低下を招くようになるという理由にもとづ
くものである。Furthermore, in the magnet of the present invention, the blending ratio of the organic binder is limited to 1 to 5% because if the ratio is less than 1%, not only will sufficient mechanical strength not be ensured, but also when the magnet is molded. The oxidation of the magnetic powder is significantly promoted by the entrained air of F, while the ratio of
This is based on the reason that if the amount exceeds 10%, the amount of dust packed in the magnetic powder will decrease, leading to a decrease in magnetic properties.
さらに、この発明の磁石は、ゴールミルやアトライタミ
ルなどで所定の粒度に調製した希土類合金微粉末を、熱
硬化型ポリイミド系樹脂、またはこれを含有する混合樹
脂と所定の割合に均一に混合し、この場合、例えばアセ
トンのような低沸点溶媒に前記樹脂を溶解し、これを前
記希土類合金微粉末と混合してスラリーとし、このスラ
リーから前記溶媒を蒸発除去する混合手段を用いると、
前記樹−脂の粘度に関係なく比較的容易に均一混合を行
なうことができ、ついで磁場中圧縮底形した後、前記樹
脂を加熱硬化する方法や、前記希土類合金微粉末を磁場
中圧縮成形し、ついでこれに前記樹脂を、望ましくは前
記樹脂の粘匪ヲ低下させる目的で加温した状態で、真空
含浸し、最終的に前記樹脂を加熱硬化する方法などによ
って製造することができ、また、上記の磁場中圧縮成形
は、成形圧カニ ２〜８ ｔｏｎＡ、印加磁場二１０．
ＫＯｅ以上の条件で行なうのが望ましい。Furthermore, the magnet of the present invention is produced by uniformly mixing rare earth alloy fine powder prepared to a predetermined particle size with a gold mill, an attritor mill, etc. with a thermosetting polyimide resin or a mixed resin containing the same at a predetermined ratio. In this case, for example, if the resin is dissolved in a low boiling point solvent such as acetone, this is mixed with the rare earth alloy fine powder to form a slurry, and the mixing means is used to evaporate and remove the solvent from this slurry.
Uniform mixing can be carried out relatively easily regardless of the viscosity of the resin, and there is a method in which the resin is compressed into a bottom shape in a magnetic field and then heated and hardened, or the rare earth alloy fine powder is compression molded in a magnetic field. Then, the resin is vacuum-impregnated, preferably in a heated state for the purpose of reducing the viscosity of the resin, and finally the resin is heated and cured. The above compression molding in a magnetic field was performed at a molding pressure of 2 to 8 tonA and an applied magnetic field of 210.
It is desirable to carry out the test under conditions of KOe or higher.
つぎに、この発明の磁石を実施例により具体的に説明す
る。Next, the magnet of the present invention will be specifically explained using examples.
実施例 １
原料粉末として、還元拡散法によって製造されたＳｍＣ
ｏ５ （Ｓｍ ： ３３．８％）からなる組成をもった
希土類合金粗粉末を用意し、この原料粉末ヲキールミル
にて粉砕して平均粒径ニアμｍの希土類合金微粉末とし
、−万態硬化型ポリイミド系樹脂として常温で液体のビ
スマレイミドトリアジン樹脂を用意し、この樹脂を前記
希土類合金微粉末：９７％に対して、３％の割合で配合
し、適宜のアセトンを加えてヂールミルにて混合して均
一なスラリーとした後、このスラリーからアセトンを蒸
発除去すると同時に造粒し、これを用いて１５ ＫＯｅ
の磁場中、５ ｔｏｎ／ｃｒｌの圧力で圧縮成形し、つ
いで得られた成形体を温度：２２０℃に１０時間保持の
条件で加熱して、前記樹脂を硬化することによって本発
明磁石１を製造した。Example 1 SmC produced by reduction diffusion method as raw material powder
A rare earth alloy coarse powder having a composition consisting of o5 (Sm: 33.8%) is prepared, and this raw material powder is pulverized in a Wokir mill to obtain a rare earth alloy fine powder with an average particle size of near μm. Prepare a bismaleimide triazine resin that is liquid at room temperature as a system resin, blend this resin at a ratio of 3% to the rare earth alloy fine powder: 97%, add appropriate acetone, and mix in a dil mill. After making a uniform slurry, acetone is evaporated and removed from this slurry and granulated at the same time, and this is used to make 15 KOe
Magnet 1 of the present invention is produced by compression molding in a magnetic field of 5 tons/crl, and then heating the obtained molded body at a temperature of 220° C. for 10 hours to harden the resin. did.
また、比較の目的で、有機バインダとして、上記３％の
ビスマレイミドトリアジン樹脂に代って、３．５％のフ
ェノールゼラツク型エポキシ樹脂を用い、温度：１５０
℃に２時間保持の条件で加熱硬化する以外は同一の条件
で従来磁石１を製造した。For comparison purposes, 3.5% phenol gelatin epoxy resin was used as an organic binder in place of the 3% bismaleimide triazine resin, and the temperature was 150.
Conventional magnet 1 was manufactured under the same conditions except that it was heated and hardened under the conditions of holding at ℃ for 2 hours.
実施例 ２
高周波溶解炉で溶解、鋳造して製造した、Ｓｍ（Ｃ０，
６０７Ｃｕｏ、７５２Ｆｅｏ、３ｏｏ Ｚｒｂ、ｏｘｓ
）７．９からなる組成をもった希土類合金インゴットを
、Ｍ気流中で温度：１２００℃に２時間保持して溶体化
した後、室温まで冷却し、引続いて高純度Ａｒ雰囲気中
にて８００℃／ｈｒの昇温速度で７５０℃に昇温しで１
時間保持し、５ ’Ｃ／ｍｉｎの冷却速度で４００°Ｃ
以下まで冷却する熱処理を５回繰り返して磁気硬化した
後、非酸化性雰囲気中でスタンプミルを用いて粗粉砕し
、さらにゼールミルにて微粉砕して平均粒径：３０μｍ
を有する希土類合金微粉末とし、ついでこの希土類合金
微粉末に３％の樟脳を添加して混合し、この結果の混合
粉末から１５ ＫＯｅの磁場中、５ ｔｏｎ／ａｄの圧
力で成形体を圧縮成形し、この成形体を、減圧下で温度
：２００℃に２時間加熱して樟脳を除去した後、これに
熱硬化型ポリイミド系樹脂としてのビスマレイミドトリ
アジン樹脂を、８０℃の温度で真空含浸し、引続いて温
度：２２０℃に１０時間加熱して前記樹脂を硬化させる
ことにより、前記磁性粉末：９８％、前記樹脂：２％か
らなる本発明磁石２を製造した。Example 2 Sm (C0,
607Cuo, 752Feo, 3oo Zrb, oxs
) A rare earth alloy ingot having a composition of The temperature was raised to 750℃ at a temperature increase rate of ℃/hr.
Hold for 400°C at a cooling rate of 5'C/min.
After magnetically hardening by repeating the heat treatment of cooling to below 5 times, it is coarsely pulverized using a stamp mill in a non-oxidizing atmosphere, and then finely pulverized using a Zeel mill to have an average particle size of 30 μm.
Next, 3% camphor was added to and mixed with the rare earth alloy fine powder, and a compact was compression molded from the resulting mixed powder at a pressure of 5 ton/ad in a magnetic field of 15 KOe. Then, this molded body was heated under reduced pressure at a temperature of 200°C for 2 hours to remove camphor, and then a bismaleimide triazine resin as a thermosetting polyimide resin was vacuum impregnated at a temperature of 80°C. Then, the resin was cured by heating at a temperature of 220° C. for 10 hours to produce a magnet 2 of the present invention consisting of 98% of the magnetic powder and 2% of the resin.
また、比較の目的で、有機バインダとして、上記ビスマ
レイミドトリアジン樹脂に代って、フェノールゼラツク
型エポキシ樹脂を用い、温度：１５０℃に２時間保持の
条件で加熱硬化する以外は同一の条件で従来磁石２を製
造した。For the purpose of comparison, a phenol gelatin epoxy resin was used as an organic binder instead of the bismaleimide triazine resin, and the same conditions were used except that it was heated and cured at a temperature of 150°C for 2 hours. Conventionally, magnet 2 was manufactured.
実施例 ３
希土類合金微粉末として、真空アーク溶解によって溶製
したＮ’ｄ”１３．５ Ｄｙ１．５ Ｆｅ７’１０１３
ｓ、ｏからなる組成を有する希土類合金インビットを、
非酸化性雰囲気中でスタンプミルを用いて粗粉砕し、７
ついでゼールミルにて微粉砕して平均粒径：４μｍとし
た希土類合金微粉末音用い、かつ熱硬化型ポリイミド系
樹脂としてのビスマレイミドトリアジン樹脂の配合割合
を５％とする以外は、実施例１におけると同一の条件で
本発明磁石３を製造した。Example 3 N'd"13.5 Dy1.5 Fe7'1013 produced by vacuum arc melting as rare earth alloy fine powder
A rare earth alloy Invit having a composition consisting of s and o,
Coarsely pulverize using a stamp mill in a non-oxidizing atmosphere, and
The same procedure as in Example 1 was then used, except that rare earth alloy fine powder was used and the blending ratio of bismaleimide triazine resin as the thermosetting polyimide resin was 5% by pulverization in a Seel mill to obtain an average particle size of 4 μm. Magnet 3 of the present invention was manufactured under the same conditions as described above.
また、比較の目的で、同じく有機バインダとして、６％
のフェノールノダラツク型エポキシ樹脂を用いる以外は
、同一の条件で従来磁石３を製造した。Also, for comparison purposes, 6%
Conventional magnet 3 was manufactured under the same conditions except that the phenolic nodalac type epoxy resin was used.
つぎに、この結果得られた本発明磁石１〜３および従来
磁石１〜３から、それぞれ１０ｍｍＸ１０ｍｍＸ１０＋
＋ａの寸法をもった試験片を切９出し、この試験片を用
いて磁気特性を測定したところ、第１表に示される結果
を示した。Next, from the magnets 1 to 3 of the present invention and the conventional magnets 1 to 3 obtained as a result, 10 mm x 10 mm x 10 +
A test piece having a dimension of +a was cut out and the magnetic properties were measured using this test piece, and the results shown in Table 1 were obtained.
また、これらの試験片を用い、本発明磁石１゜２および
従来磁石１，２については、磁束の温度変化を測定し、
さらに本発明磁石３および従来磁石３については、温度
：４０°Ｃ１６５％ＲＨ平衡の大気中における磁束の経
時変化を測定した。これらの結果を第１〜３図にそれぞ
れ示した。In addition, using these test pieces, temperature changes in magnetic flux were measured for the magnet 1゜2 of the present invention and conventional magnets 1 and 2.
Furthermore, regarding the magnet 3 of the present invention and the conventional magnet 3, changes in magnetic flux over time in the atmosphere at a temperature of 40° C. and 165% RH equilibrium were measured. These results are shown in Figures 1 to 3, respectively.
第１表に示される結果から、本発明磁石１〜３において
は、これに用いられる熱硬化型ポリイミド系樹脂が従来
磁石１〜３で用いられているエポキシ樹脂に比して機械
的強度およびぬれ性にすぐれているので、有機バインダ
の配合割合を相対的に低くすることができることから、
希土類合金微粉末の高密度化が可能となり、この結果従
来磁石１〜３に比してすぐれた磁気特性をもつようにな
ることが明らかである。From the results shown in Table 1, the thermosetting polyimide resin used in magnets 1 to 3 of the present invention has a higher mechanical strength and wettability than the epoxy resin used in conventional magnets 1 to 3. Because of its excellent properties, the blending ratio of organic binder can be kept relatively low.
It is clear that it is possible to increase the density of the rare earth alloy fine powder, and as a result, it has superior magnetic properties compared to conventional magnets 1 to 3.
また、第１〜３図に示されるように、熱硬化型ポリイミ
ド系樹脂は、エポキシ樹脂に比してガスシールド性にす
ぐれ、かつ高い長期耐熱性温度を有するので、前記熱硬
化型ポリイミド系樹脂を用いた本発明磁石１〜３は、エ
ポキシ樹脂を用いた従来磁石１〜３に比してすぐれた耐
熱性へおよび耐酸化性を示すことが明らかである。Furthermore, as shown in Figures 1 to 3, thermosetting polyimide resins have better gas shielding properties and higher long-term heat resistance than epoxy resins. It is clear that magnets 1 to 3 of the present invention using epoxy resin exhibit superior heat resistance and oxidation resistance compared to conventional magnets 1 to 3 using epoxy resin.
上述のように、この発明の希土類ゼンド磁石は、機械的
強度、ぬれ性、およびガスシールド性にすぐれ、かつ高
い長期耐熱性温度を有する熱硬化型ポリイミド系樹脂の
配合によって、すぐれた磁気特性、耐熱性、および耐酸
化性を具備するものである。As mentioned above, the rare earth Zend magnet of the present invention has excellent mechanical strength, wettability, and gas shielding properties, and has excellent magnetic properties due to the combination of thermosetting polyimide resin that has a high long-term heat resistance temperature. It has heat resistance and oxidation resistance.
第１，２図は、磁束の温度変化を示す関係図、第３図は
磁束の経時変化を示す関係図である。1 and 2 are relationship diagrams showing changes in magnetic flux with temperature, and FIG. 3 is a relationship diagram showing changes in magnetic flux over time.
Claims (1)
類ボンド磁石において、前記有機バインダとして、熱硬
化型ポリイミド系樹脂、または熱硬化型ポリイミド系樹
脂を３０重量％以上含有する混合樹脂を用い、かつこれ
らの樹脂を前記希土類合金微粉末に対して１〜５重量％
の割合で配合してなる耐熱性および耐酸化性のすぐれた
希土類ボンド磁石。A rare earth bonded magnet formed by bonding rare earth alloy fine powder with an organic binder, in which a thermosetting polyimide resin or a mixed resin containing 30% by weight or more of a thermosetting polyimide resin is used as the organic binder, and 1 to 5% by weight of the resin based on the rare earth alloy fine powder
A rare earth bonded magnet with excellent heat resistance and oxidation resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61166619A JP2568511B2 (en) | 1986-07-17 | 1986-07-17 | High strength with excellent heat and oxidation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61166619A JP2568511B2 (en) | 1986-07-17 | 1986-07-17 | High strength with excellent heat and oxidation resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6324607A true JPS6324607A (en) | 1988-02-02 |
| JP2568511B2 JP2568511B2 (en) | 1997-01-08 |
Family
ID=15834656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61166619A Expired - Lifetime JP2568511B2 (en) | 1986-07-17 | 1986-07-17 | High strength with excellent heat and oxidation resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2568511B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH033205A (en) * | 1989-05-30 | 1991-01-09 | Seiko Epson Corp | Manufacture of resin coupling type magnet |
| US5393445A (en) * | 1991-12-26 | 1995-02-28 | Daido Tokushuko Kabushiki Kaisha | Rare-earth bonded magnet, material and method for manufacturing the same |
| CN106024234A (en) * | 2016-07-26 | 2016-10-12 | 徐靖才 | Preparation method of light rare earth complex modified sintered samarium-cobalt magnet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57118606A (en) * | 1981-01-16 | 1982-07-23 | Seiko Epson Corp | Combined type rare-earth magnet |
| JPS5830107A (en) * | 1981-08-17 | 1983-02-22 | Seiko Epson Corp | Manufacture of permanent magnet |
-
1986
- 1986-07-17 JP JP61166619A patent/JP2568511B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57118606A (en) * | 1981-01-16 | 1982-07-23 | Seiko Epson Corp | Combined type rare-earth magnet |
| JPS5830107A (en) * | 1981-08-17 | 1983-02-22 | Seiko Epson Corp | Manufacture of permanent magnet |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH033205A (en) * | 1989-05-30 | 1991-01-09 | Seiko Epson Corp | Manufacture of resin coupling type magnet |
| US5393445A (en) * | 1991-12-26 | 1995-02-28 | Daido Tokushuko Kabushiki Kaisha | Rare-earth bonded magnet, material and method for manufacturing the same |
| CN106024234A (en) * | 2016-07-26 | 2016-10-12 | 徐靖才 | Preparation method of light rare earth complex modified sintered samarium-cobalt magnet |
| CN106024234B (en) * | 2016-07-26 | 2017-10-17 | 中国计量大学 | A kind of light rare earth complex is modified the preparation method of sintered samarium cobalt magnet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2568511B2 (en) | 1997-01-08 |
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