JP2013509734A - 磁石を製造するための方法ならびに磁石および電気機械 - Google Patents
磁石を製造するための方法ならびに磁石および電気機械 Download PDFInfo
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Abstract
Description
冒頭で述べた方法は、公知先行技術に基づき公知である。磁石材料は、たとえば鉄もしくはフェライトである。磁石材料は、しばしば粉末として提供される。この粉末は焼結されるかもしくは加圧焼結され、これによって、磁石が製造される。択一的または付加的には、磁石材料がバインダと混合されてもよい。次いで、磁石材料−バインダ混合物から、磁石が成形され、硬化させられる。この場合、成形は、たとえば流込みまたは射出を包含していてよい。バインダはプラスチック、特にPPS(ポリフェニレンスルフィド)、またはこれに類するものを包含していてよい。磁石の硬化後、磁石材料はバインダによって物理的に取り囲まれているかもしくはバインダ内に含み込まれている。しかし、このように製造された磁石は、酸素もしくは腐食性の媒体に接触すると、著しく腐食する傾向にある。このために、磁石の防護が必要となる。この場合、金属から成る防護層が広く普及している。この防護層は、たとえばニッケルおよび/または亜鉛を含有している。このニッケルおよび/または亜鉛によって、特に加圧焼結された磁石が腐食に対して防護される。また、酸化物から成る防護層も公知である。この防護層は、溶媒に含まれた金属アルコキシドの溶液の形で磁石に被着される。磁石材料とバインダとの混合下での磁石の製造は、多くの使用例に対する磁石材料の直接的な焼結に比べて、著しく高いフレキシビリティを有していて、したがって、推奨することができる。また、バインダ、たとえば(プラスチック造粒物の形の)プラスチック内への磁石材料の組込みによって、腐食に対する磁石材料のある程度の防護が保証される。しかし、特に磁石と燃料および燃料の添加剤との接触時には、このような磁石の場合でも、短時間後には著しい腐食を招いてしまう。このことは、最終的には、磁石を有するシステムの故障に繋がることがある。
本発明に係る方法によれば、バインダから、硬化の間、磁石材料に化学的に結合される金属酸化物を生成する。
2 軸
3 磁石材料
4 バインダ
5 溶媒
6 添加剤
7 ゲル
8 金属酸化物
9 化合物
10 マトリックス
Claims (10)
- 磁石(1)を少なくとも磁石材料(3)とバインダ(4)とから成形し、次いで、硬化させて、磁石(1)を製造するための方法において、バインダ(4)から、硬化の間、磁石材料(3)に化学的に結合される金属酸化物(8)を生成することを特徴とする、磁石を製造するための方法。
- 金属酸化物(8)をゾル−ゲル法で生成する、請求項1記載の方法。
- 磁石材料(3)として、少なくとも一種類の希土類材料を使用する、請求項1または2記載の方法。
- バインダ(4)の成分として、少なくとも一種類のシロキサン、少なくとも一種類のシラン、特にアルコキシシランまたはエトキシシラン、特に有利にはテトラエトキシシラン、少なくとも一種類の金属ハロゲン化物、少なくとも一種類の金属アルコキシドおよび/または金属酸化物ナノ粒子を使用する、請求項1から3までのいずれか1項記載の方法。
- バインダ(4)および/または磁石材料(3)を溶媒(5)内に供給する、請求項1から4までのいずれか1項記載の方法。
- バインダ(4)と磁石材料(3)とに、特にナノ粒子、ポリマ溶液および/またはケイ酸から成る添加剤(6)を供給する、請求項1から5までのいずれか1項記載の方法。
- 磁石材料(3)、バインダ(4)および/または溶媒(5)を、硬化が実施される型内に流し込む、請求項1から6までのいずれか1項記載の方法。
- 磁石(1)に少なくとも部分的に被覆層、特にゾル−ゲル被覆層を設ける、請求項1から7までのいずれか1項記載の方法。
- 特に請求項1から8までのいずれか1項記載の方法を使用して製造された磁石(1)であって、該磁石(1)が、少なくとも磁石材料(3)とバインダ(4)とから成形されていて、次いで、硬化させられている磁石において、磁石材料(3)が、硬化の間に生成された、該磁石材料(3)に化学的に結合された金属酸化物(8)内に囲い込まれていることを特徴とする、磁石。
- 電気機械、特に電動モータであって、該電気機械が、特に請求項1から8までのいずれか1項記載の方法を使用して製造された、特に請求項9記載の少なくとも1つの磁石(1)を備えており、該磁石(1)が、少なくとも磁石材料(3)とバインダ(4)とから成形されていて、次いで、硬化させられている電気機械において、磁石材料(3)が、硬化の間に生成された、該磁石材料(3)に化学的に結合された金属酸化物(8)内に囲い込まれていることを特徴とする、電気機械。
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DE102009046426.3 | 2009-11-05 | ||
DE102009046426A DE102009046426A1 (de) | 2009-11-05 | 2009-11-05 | Verfahren zur Herstellung eines Magnets sowie Magnet und elektrische Maschine |
PCT/EP2010/066432 WO2011054746A1 (de) | 2009-11-05 | 2010-10-29 | Verfahren zur herstellung eines magnets sowie magnet und elektrische maschine |
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JP2013509734A true JP2013509734A (ja) | 2013-03-14 |
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US (1) | US20120319807A1 (ja) |
EP (1) | EP2497094A1 (ja) |
JP (1) | JP2013509734A (ja) |
KR (1) | KR20120096483A (ja) |
CN (1) | CN102667971A (ja) |
DE (1) | DE102009046426A1 (ja) |
WO (1) | WO2011054746A1 (ja) |
Cited By (1)
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JP2021027100A (ja) * | 2019-08-01 | 2021-02-22 | 昭和電工マテリアルズ株式会社 | 希土類ボンド磁石用コンパウンド及びその製造方法、並びに、希土類ボンド磁石及びその製造方法 |
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DE102012218498A1 (de) * | 2012-10-11 | 2014-04-17 | Siemens Aktiengesellschaft | Dynamoelektrische Maschine mit einem mehrpoligen Rotor mit Permanentmagneten und deren Herstellung |
DE102013004985A1 (de) * | 2012-11-14 | 2014-05-15 | Volkswagen Aktiengesellschaft | Verfahren zur Herstellung eines Permanentmagneten sowie Permanentmagnet |
DE102013213494A1 (de) * | 2013-07-10 | 2015-01-29 | Volkswagen Aktiengesellschaft | Verfahren zur Herstellung eines Permanentmagneten sowie Permanentmagnet und elektrische Maschine mit einem solchen |
DE102015213957B4 (de) * | 2015-07-23 | 2019-03-14 | Volkswagen Aktiengesellschaft | Verfahren zur Herstellung eines Hybridmagneten sowie mit dem Verfahren herstellbarer Hybridmagnet und eine den Hybridmagnet umfassende elektrische Maschine |
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WO2011054746A1 (de) | 2011-05-12 |
DE102009046426A1 (de) | 2011-05-12 |
KR20120096483A (ko) | 2012-08-30 |
CN102667971A (zh) | 2012-09-12 |
EP2497094A1 (de) | 2012-09-12 |
US20120319807A1 (en) | 2012-12-20 |
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