JPH0480903A - Manufacture of forming material for bonded magnet - Google Patents
Manufacture of forming material for bonded magnetInfo
- Publication number
- JPH0480903A JPH0480903A JP19385290A JP19385290A JPH0480903A JP H0480903 A JPH0480903 A JP H0480903A JP 19385290 A JP19385290 A JP 19385290A JP 19385290 A JP19385290 A JP 19385290A JP H0480903 A JPH0480903 A JP H0480903A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic powder
- ferrite
- alkali
- treated
- treatment
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000006247 magnetic powder Substances 0.000 claims abstract description 25
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 24
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 239000007822 coupling agent Substances 0.000 claims abstract description 10
- 238000004381 surface treatment Methods 0.000 claims abstract description 10
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 4
- 239000000057 synthetic resin Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 15
- 230000005291 magnetic effect Effects 0.000 abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000007864 aqueous solution Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 abstract description 3
- 150000001412 amines Chemical class 0.000 abstract description 2
- 229910021529 ammonia Inorganic materials 0.000 abstract description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract 3
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 abstract 2
- 229910000027 potassium carbonate Inorganic materials 0.000 abstract 1
- 235000015320 potassium carbonate Nutrition 0.000 abstract 1
- 230000002940 repellent Effects 0.000 abstract 1
- 239000005871 repellent Substances 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- 239000000843 powder Substances 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003607 modifier Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000006249 magnetic particle Substances 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 101100027969 Caenorhabditis elegans old-1 gene Proteins 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- BDAGIHXWWSANSR-NJFSPNSNSA-N hydroxyformaldehyde Chemical compound O[14CH]=O BDAGIHXWWSANSR-NJFSPNSNSA-N 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012756 surface treatment agent Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、０Ａｌｌｌ器や複写機などの部品である小型
モーターやマグネットロールの永久磁石部分に用いられ
るボンド磁石用成形素材の製造方法に関するものである
。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a method for manufacturing a molded material for bonded magnets used for permanent magnet parts of small motors and magnet rolls, which are parts of 0All devices and copying machines. It is.
〈従来の技術〉
電気機器等に用いられる永久磁石材料として、従来フェ
ライｉｆｆ石、積土Ｒ磁石等が用いられている。これら
は主に成形後に焼結を行うことにより製造されるが、焼
結時の収縮が大きいため寸法精度を上げるには研削等の
後加工が必要である。<Prior Art> As permanent magnet materials used in electrical equipment and the like, Ferrite IF stones, earthwork R magnets, and the like have conventionally been used. These are mainly manufactured by sintering after molding, but because of the large shrinkage during sintering, post-processing such as grinding is required to improve dimensional accuracy.
そのためコストが高くなるという欠点があるばかりでな
く焼結物は一般にもろく、また複雑な形状のものが製造
しにくいという欠点もある。This not only has the drawback of increasing costs, but also has the drawback that sintered products are generally brittle, and it is difficult to manufacture products with complex shapes.
焼結磁石の欠点を補うものとして、近年ボンド磁石が注
目を浴びている。ボンド磁石は焼結！ｎ石と比較して割
れ、欠けが生じにくく、薄肉、複雑形状のものが得られ
、また低比重であるため軽量化が可能である。更に成形
収縮率が小さいため寸法精度のよい成形品が得られ、後
加工が不要であり他の部品との一体成形による工程の省
略化が可能であるなどの長所を持っている。Bonded magnets have recently been attracting attention as a means of compensating for the drawbacks of sintered magnets. Bonded magnets are sintered! Compared to n-stone, it is less prone to cracking and chipping, and can be made thinner and with more complex shapes, and has a lower specific gravity, making it possible to reduce weight. Further, since the molding shrinkage rate is small, molded products with good dimensional accuracy can be obtained, and there are advantages such as no post-processing is required, and steps can be omitted by integral molding with other parts.
ボンド磁石は通常、強磁性粉と樹脂との混合物から成っ
ている０強磁性粉はＲａフェライト、Ｓｒフェライト等
のマグネトブランバイト型フェライト磁石材料及びＳｍ
Ｃｏ合金、ＮｄＦｅＢ合金等の希土類合金磁石材料など
の粉末が用いられる。しかしボンド磁石は非磁性の樹脂
を含むためにその体積分だけ焼結磁石より磁力が低い。Bonded magnets are usually made of a mixture of ferromagnetic powder and resin.
Powders such as rare earth alloy magnet materials such as Co alloy and NdFeB alloy are used. However, since bonded magnets contain non-magnetic resin, their magnetic force is lower than that of sintered magnets due to their volume.
また、Ｂａフェライト、Ｓｒフェライトの粉末は一般に
酸化鉄と炭酸バリウム又は炭酸ストロンチウムをマグネ
トブランバイト型フェライトを形成する組成比に混合し
、次いで１０００〜１３００°Ｃで焼成した後、微粉砕
し、更に熱処理することにより得られるが、充填率があ
まり上がらす配向度が低いという欠点があった。In addition, powders of Ba ferrite and Sr ferrite are generally prepared by mixing iron oxide and barium carbonate or strontium carbonate in a composition ratio that forms magnetobrambite-type ferrite, then firing at 1000 to 1300°C, finely pulverizing, and then Although it can be obtained by heat treatment, it has the disadvantage that the degree of orientation is low because the filling rate is too high.
そのため、磁性粉の配向性を高めボンド磁石の磁気特性
を向上させるためにいくつかの提案がなされている。Therefore, several proposals have been made to improve the magnetic properties of bonded magnets by increasing the orientation of magnetic powder.
特開昭５９−９３７４１号公報には、フェライト原料を
Ｔｉカップリング剤で表面処理し、磁粉の流動性、配向
性を向上させることが開示されている。また特開昭５９
−１７０１３０号公報には有８９＃’Ｊ系化合物での表
面処理が、また特開昭５９−１７４６３６号公報にはシ
ラン系カップリング剤を用いて同様の効果を得ることが
開示されている。JP-A-59-93741 discloses that a ferrite raw material is surface-treated with a Ti coupling agent to improve the fluidity and orientation of magnetic particles. Also, JP-A-59
JP-A-170130 discloses surface treatment with an 89#'J compound, and JP-A-59-174636 discloses obtaining a similar effect using a silane coupling agent.
しかしながら、カップリング剤を用いた場合でも流動性
の向上はまだ不十分であり、そこで例えば特開昭５８−
１５８９０３号公報のようにアミノ基を有する有機金属
化合物及びビスアミドを樹脂改質剤として添加し樹脂の
流動性を上げているが、この場合には樹脂の粘度低下に
伴う機械的強度の低下が不可避であった。However, even when a coupling agent is used, the improvement in fluidity is still insufficient.
As in Publication No. 158903, an organic metal compound having an amino group and a bisamide are added as a resin modifier to increase the fluidity of the resin, but in this case, a decrease in mechanical strength due to a decrease in the viscosity of the resin is unavoidable. Met.
〈発明が解決しようとする課題〉
本発明は、樹脂改質剤を添加せずとも流動性が良好で、
その結果磁気特性及び機械的強度の、優れたボンド磁石
が得られるフェライト磁粉を原料としたボンド磁石用成
形素材を提供することを目的とするものである。<Problems to be solved by the invention> The present invention has good fluidity without adding a resin modifier,
The object of the present invention is to provide a bonded magnet molding material made from ferrite magnetic powder, from which a bonded magnet with excellent magnetic properties and mechanical strength can be obtained.
〈課題を解決するための手段〉
すなわち、本発明は、マトリックスとしての合成樹脂と
フェライト磁粉を混合混練するに際して、予めフェライ
ト磁粉をアルカリ処理したのち表面処理用カップリング
剤にて処理することを特徴とするボンド磁石用成形素材
の製造方法である。<Means for Solving the Problem> That is, the present invention is characterized in that, when mixing and kneading the synthetic resin as a matrix and the ferrite magnetic powder, the ferrite magnetic powder is previously treated with an alkali and then treated with a coupling agent for surface treatment. This is a method for manufacturing a molded material for a bonded magnet.
〈作 用〉
本発明におけるフェライト磁粉とは、一般にＢａフェラ
イト、Ｓｒフェライト、ｐｂフェライト等で呼ばれるマ
グネトブランバイト型フェライトのことである０通常の
方法によれば、これらの磁粉にカップリング剤として、
例えばＴ−アミノプロピルトリエトキシシランなどを０
．５ｗｔ％程度表面処理するが、粉の撥水性は十分に得
られず表面処理剤が十分作用しているきは言えない。<Function> The ferrite magnetic powder in the present invention refers to a magnetobrambite type ferrite generally referred to as Ba ferrite, Sr ferrite, PB ferrite, etc. According to a normal method, these magnetic particles are added as a coupling agent.
For example, T-aminopropyltriethoxysilane etc.
．． Although about 5 wt% of the surface is treated, the water repellency of the powder is not sufficient and it cannot be said whether the surface treatment agent is working sufficiently.
ところが本発明の処理、すなわち予め磁粉にアルカリ処
理を施した場合、前者と比較し格段の撥水性が得られる
。この現象については明白な理由は得られていないが、
カップリング剤の官能基と粉末表面との物理・化学的引
力が増し、磁粉表面でカップリング剤が一様に疎水基を
外に向は配列していると考えられる。However, when the treatment of the present invention, that is, the magnetic powder is subjected to alkali treatment in advance, much water repellency can be obtained compared to the former method. Although no clear reason has been found for this phenomenon,
It is thought that the physical and chemical attraction between the functional groups of the coupling agent and the powder surface increases, and that the coupling agent uniformly arranges the hydrophobic groups outward on the magnetic powder surface.
本発明でアルカリ処理に用いられるアルカリの種類は特
に限定されるものではな（、ＮａＯＨ１ＫＯＨ１ＫＩＣ
ｏ、、Ｎａ１ＣＯ３の他アンモニア、アミン等の水溶液
が使用てきる。The type of alkali used in the alkali treatment in the present invention is not particularly limited (NaOH1KOH1KIC
In addition to Na1CO3, aqueous solutions of ammonia, amines, etc. can be used.
また、本発明において用いられる表面処理用カップリン
グ剤としては、シラン系、チタン系、アルミニウム系、
有機リン系等がある。しかしマトリックスである合成樹
脂の種類によって表面処理の効果は異なるが、通常はシ
ラン系のものが最もよく使用されている。In addition, the surface treatment coupling agents used in the present invention include silane-based, titanium-based, aluminum-based,
There are organic phosphorus types, etc. However, the effect of surface treatment varies depending on the type of synthetic resin that is the matrix, but silane-based resins are usually most commonly used.
なお本発明のアルカリ処理の程度として、アルカリ処理
後該磁粉を水によって抽出処理（ＪＩＳＫ ５１０１）
した後の水のｐＨが１０以上で、かつｐＨが１３以下
であることが好ましい、 ｐＨｌｏ未満では処理の効果
が現れず磁気特性が向上しない、またｐＨが１３を上回
る場合、流動性は良くなるもののコンパウンドの強度低
下が生じてしまう。The degree of alkali treatment in the present invention is as follows: After the alkali treatment, the magnetic powder is extracted with water (JISK 5101).
It is preferable that the pH of the water after treatment is 10 or more and 13 or less. If the pH is less than pH 10, the treatment effect will not appear and the magnetic properties will not improve, and if the pH is higher than 13, the fluidity will be improved. This results in a decrease in the strength of the compound.
〈実施例〉
実施例！
平均粒径１ 、４１ｔｎのＳｒフェライト磁粉を使用し
、この磁粉８ｋｇをヘンシェルミキサー中に入れＰＲ拌
しながら８％のＮａＯＨ水溶液１００ｇを滴下した。こ
の磁粉を１３０℃で５時間乾燥し水分を蒸発させたのち
、この磁粉８０００ ｇを再びヘンシェルミキサー中で
攪拌しながら、γ−アミノプロピルトリエトキシシラン
４０ｇと水４０ｇの混合液を滴下し表面処理を行った。<Example> Example! Sr ferrite magnetic powder with an average particle size of 1.41 tn was used, and 8 kg of the magnetic powder was placed in a Henschel mixer, and 100 g of an 8% NaOH aqueous solution was added dropwise while stirring. After drying this magnetic powder at 130°C for 5 hours to evaporate water, 8000 g of this magnetic powder was again stirred in the Henschel mixer and a mixed solution of 40 g of γ-aminopropyltriethoxysilane and 40 g of water was added dropwise for surface treatment. I did it.
水分除去のため１３０℃で５時間乾燥を行い、この磁粉
７２４０ ｇに対しナイロン樹脂粉末７６０ｇを加えヘ
ンシェルミキサーで混合した。この混合物を２軸押出機
により２４０’Ｃ程度で混練を行いコンパウンドとし、
２〜５ＩｉＩ１１の長さにペレット化した。After drying at 130° C. for 5 hours to remove moisture, 760 g of nylon resin powder was added to 7240 g of the magnetic powder and mixed in a Henschel mixer. This mixture is kneaded at about 240'C using a twin-screw extruder to form a compound.
It was pelleted to a length of 2-5IiI11.
コンパウンドの流動性の評価はＡＳＴＭ Ｄ １２３８
により行い、メルトインデックス（Ｍ、Ｉ。ASTM D 1238 is used to evaluate the fluidity of compounds.
Melt index (M, I.
）は４８ｇ／１０ｍであった。またコンパウンドのベレ
ットを射出成形機に装入し２８０℃程度で射出成形を行
った。得られた成形体は外径２０闘、厚さ５閣の円板状
磁石であり、配向磁界は円板の中心軸方向に１５ｋＯｅ
印加している。磁気特性の測定はＢＨトレーサーで行い
、その結果（ＢＨ）願は２．ＯＯＭＧＯｅであった。ま
たＡＳＴＭ Ｄ ６３０に従い成形体を得て曲げ強度を
測定したところ９８０ｋｇ／（ｊの強度であった０以上
の結果を第１表に示す。) was 48g/10m. Further, the pellet of the compound was charged into an injection molding machine and injection molding was performed at about 280°C. The obtained compact is a disc-shaped magnet with an outer diameter of 20 mm and a thickness of 5 cm, and the orientation magnetic field is 15 kOe in the direction of the central axis of the disc.
is being applied. The magnetic properties were measured using a BH tracer, and the results (BH) are shown in 2. It was OOMGOe. In addition, a molded product was obtained according to ASTM D 630, and the bending strength was measured. Table 1 shows the results of 0 or more, which was a strength of 980 kg/(j).
実施例２
ＮａＯＨにかわりに０！１を用いた以外は実施例１と同
様であり、Ｍ、１．は３９ｇ／１０幽、（Ｂｌｌ）願は
１．９８ＭＧＯｅ、曲げ強度は９１０ｋｇ／ｃｄであっ
た。Example 2 Same as Example 1 except that 0!1 was used instead of NaOH, and M, 1. was 39g/10g/cd, (Bll) application was 1.98MGOe, and the bending strength was 910kg/cd.
実施例３
ＮａＯＨにかわり８％のアンモニア水１００ｇを滴下し
た以外は実施例りと同様であり、Ｍ、１．は３５ｇ／１
０ｍＩｎ、（Ｂｌｌ）ｍは１．９７ＭＣ；Ｏｅ、曲げ強
度は９９０ｋｇ／ｃ＋ｆｌであった。Example 3 The procedure was the same as in Example except that 100 g of 8% ammonia water was added dropwise instead of NaOH, and M, 1. is 35g/1
0 mIn, (Bll)m was 1.97 MC; Oe, and the bending strength was 990 kg/c+fl.
実施例４
Ｓｒフェライトにかえ、平均粒径Ｌ４ａｍのＢａフェラ
イトを用いた以外は実施例１と同様であり１、Ｍ■、は
４６ｇ／ｌｏｏｍ、（（Ｉｌｌ）ｍは２．ＯＯＭＧＯｅ
、曲げ強度は９６０ｋｇ／ｃｄであった。Example 4 The same as Example 1 except that Ba ferrite with an average grain size L4am was used instead of Sr ferrite.
The bending strength was 960 kg/cd.
実施例５
Ｓｒフェライトにかえ、平均粒径１ 、４ ｐＷｌのｐ
ｂフェライトを用いた以外は実施例１と同様であり、Ｍ
。Example 5 Instead of Sr ferrite, p with an average grain size of 1 and 4 pWl
Same as Example 1 except that B ferrite was used, and M
.
■、は４５ｇ／１０ｍｍ、（Ｂｌｌ）ｍは２．ＯＯＭＧ
Ｏｅ、曲げ強度は９６０ｋｇ／ｃｉａであった。■, is 45g/10mm, (Bll)m is 2. OOMG
Oe and bending strength were 960 kg/cia.
実施例６
平均粒径１．４ｐ＋ｗのＳｒフェライト磁粉を使用し、
この磁粉８ｋｇを０．０８％のＮａ０ＩＩ水溶液１０ｋ
ｇに漫しよ＜ＦＭ拌しスラリー状にした後、乾燥機に入
れ水分を取り除いた。その後この磁粉８ｋｇをヘンシェ
ルミキサー中で撹拌しながら、γ−アミノプロピルトリ
エトキソシラン４０ｇと水４０ｇの混合液を滴下し表面
処理を行った。以降は実施例１と同様であり、Ｍ、１．
は５３ｇ／１０ｍｎ、（Ｂｔｌ）ｓａｘは２．０２
ＭＧＯｅ、曲げ強度は９２０ｋｇ／ｃ−であった。Example 6 Using Sr ferrite magnetic powder with an average particle size of 1.4p+w,
8 kg of this magnetic powder was mixed with 10 kg of 0.08% Na0II aqueous solution.
After stirring with FM to make a slurry, it was placed in a dryer to remove moisture. Thereafter, while stirring 8 kg of this magnetic powder in a Henschel mixer, a mixed solution of 40 g of γ-aminopropyltriethoxosilane and 40 g of water was added dropwise to perform surface treatment. The subsequent steps are the same as in Example 1, with M, 1.
is 53g/10mn, (Btl)sax is 2.02
The bending strength of MGOe was 920 kg/c-.
比較例１
Ｎ ａ ＯＩＩ水溶液を滴下しないこと以外は実施例１
と同様であり、得られた結果はＭ、１．は９ｇ／１Ｏ−
１（ＢＨ） ｗ；ａは１．８２ＭＩＣ０ｅ、曲げ強度は
９８０ｋｇ／ｄであり、実施例に比べ流動性と磁気特性
が劣る。Comparative Example 1 Example 1 except that the N a OII aqueous solution was not added dropwise.
The results obtained are as follows: M, 1. is 9g/1O-
1(BH) w;a is 1.82 MIC0e, bending strength is 980 kg/d, and fluidity and magnetic properties are inferior to Examples.
比較例２
ＮａＯＨ水溶液を滴下しないこと以外は実施例４と同様
であり、得られた結果はＭ、１．は８ｇ／１Ｏ−１（Ｂ
Ｈ） ｗは１．７８ＭＧＯｅ、曲げ強度はｇ５０ｋｇ／
Ｃ−であり、実施例に比べ流動性と磁気特性が劣る。Comparative Example 2 Same as Example 4 except that the NaOH aqueous solution was not added dropwise, and the obtained results were as follows: M, 1. is 8g/1O-1(B
H) w is 1.78MGOe, bending strength is g50kg/
C-, and the fluidity and magnetic properties are inferior to those of the examples.
比較例３
ＮａＯ）Ｉ水溶液を滴下しないこと以外は実施例５と同
様であり、得られた結果はＭ、１．は７ｇ／１０廟、（
旧１）ｍは１．８０ＭＧＯｅ、曲げ強度は９６０ｋｇ／
ｃｄであり、実施例に比べ流動性と磁気特性が劣る。Comparative Example 3 Same as Example 5 except that the NaO)I aqueous solution was not added dropwise, and the obtained results were as follows: M, 1. is 7g/10 temples, (
Old 1) m is 1.80MGOe, bending strength is 960kg/
cd, and its fluidity and magnetic properties are inferior to those of the examples.
比較例４
Ｓｒフェライト磁粉８０００ ｇに対し、ＮａＯＨ水溶
液を滴下せずヘンシェルミキサー中で攪拌しなからＴ−
アミノプロピルトリエトキシシラン４０ｇと水４０ｇの
混合液を滴下し、表面処理を行い乾燥後、この磁粉７２
４０ ｇに対しナイロンに樹脂粉末５１０ｇ、樹脂改質
剤としてエチレンビスステアリン酸アミド２５０ ｇを
加え、ヘンシェルミキサーで混合した以外は実施例１と
同様であり、このときＭ、ｌ。Comparative Example 4 To 8000 g of Sr ferrite magnetic powder, T-
A mixture of 40 g of aminopropyltriethoxysilane and 40 g of water was added dropwise, and after surface treatment and drying, the magnetic powder 72
The procedure was the same as in Example 1 except that 510 g of resin powder and 250 g of ethylene bisstearamide as a resin modifier were added to 40 g of nylon and mixed in a Henschel mixer.
は２６ｇ／１０ｍ、（ＢＨ） ｗａは１．９５ＭＧＯｅ
、曲げ強度は７００ｋｇ／ｃｄであり、実施例に比べ流
動性がやや劣り、曲げ強度が劣る。is 26g/10m, (BH) wa is 1.95MGOe
The bending strength was 700 kg/cd, and the fluidity was slightly inferior to that of the example, and the bending strength was inferior.
〈発明の効果〉
本発明により得られた磁粉は表面処理用力・ノブリング
剤が有効に作用し、樹脂改質剤を添加せずとも流動性、
磁気特性に優れ、さらに機械的強度の低下もないボンド
磁石を得ることができる。<Effects of the Invention> In the magnetic powder obtained by the present invention, the surface treatment force and the knobling agent effectively act, and the fluidity and flowability are improved even without adding a resin modifier.
A bonded magnet with excellent magnetic properties and no decrease in mechanical strength can be obtained.
Claims (1)
合混練するに際して、予めフェライト磁粉をアルカリ処
理したのち表面処理用カップリング剤にて処理すること
を特徴とするボンド磁石用成形素材の製造方法。A method for producing a molded material for a bonded magnet, which comprises, when mixing and kneading a synthetic resin as a matrix and ferrite magnetic powder, the ferrite magnetic powder is previously treated with an alkali and then treated with a coupling agent for surface treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19385290A JPH0480903A (en) | 1990-07-24 | 1990-07-24 | Manufacture of forming material for bonded magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19385290A JPH0480903A (en) | 1990-07-24 | 1990-07-24 | Manufacture of forming material for bonded magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0480903A true JPH0480903A (en) | 1992-03-13 |
Family
ID=16314827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19385290A Pending JPH0480903A (en) | 1990-07-24 | 1990-07-24 | Manufacture of forming material for bonded magnet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0480903A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009176960A (en) * | 2008-01-24 | 2009-08-06 | Toda Kogyo Corp | Magnetoplumbite type ferrite particle powder for bond magnet, method of manufacturing same, and resin composition, bond magnet, and magnet roll using magnetoplumbite type ferrite particle powder |
| JP2010504208A (en) * | 2007-01-12 | 2010-02-12 | コスロブ，アレクサンダー | Process and apparatus for separating materials heavier than plastic, preferably metals, by floating in a water bath when separating plastic materials based on specific gravity |
-
1990
- 1990-07-24 JP JP19385290A patent/JPH0480903A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010504208A (en) * | 2007-01-12 | 2010-02-12 | コスロブ，アレクサンダー | Process and apparatus for separating materials heavier than plastic, preferably metals, by floating in a water bath when separating plastic materials based on specific gravity |
| US9375724B2 (en) | 2007-01-12 | 2016-06-28 | Alexander Koslow | Method of and apparatus for separating out materials heavier than plastic, in particular metals, by flotation in a water bath, in a separation of plastics of different densities |
| JP2009176960A (en) * | 2008-01-24 | 2009-08-06 | Toda Kogyo Corp | Magnetoplumbite type ferrite particle powder for bond magnet, method of manufacturing same, and resin composition, bond magnet, and magnet roll using magnetoplumbite type ferrite particle powder |
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