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R-Fe-B BASED THIN FILM MAGNET AND METHOD FOR PREPARATION THEREOF

外国特許コード F110004971
整理番号 RX03P21WO
掲載日 2011年7月28日
出願国 大韓民国
出願番号 20067018466
公報番号 20070030761
公報番号 100826661
出願日 平成18年9月8日(2006.9.8)
公報発行日 平成19年3月16日(2007.3.16)
公報発行日 平成20年5月2日(2008.5.2)
国際出願番号 JP2005005183
国際公開番号 WO2005091315
国際出願日 平成18年9月8日(2006.9.8)
国際公開日 平成17年9月29日(2005.9.29)
発明の名称 (英語) R-Fe-B BASED THIN FILM MAGNET AND METHOD FOR PREPARATION THEREOF
発明の概要(英語) An R-Fe-B based thin film magnet which comprises an R-Fe-B based alloy containing 28 to 45 mass % of an R element (wherein R represents one or more of rare earth lanthanide elements) and is formed into a film by a physical means, wherein the alloy has a composite structure comprising R[2]Fe[14]B crystals having a crystal diameter of 0.5 to 30 μm and grain boundary phases being present at borders of said crystals and being rich in the R element; and a method for preparing the R-Fe-B based thin film magnet, which comprises heating the film to a temperature of 700 to 1200°C during the above physical film forming and/or in the subsequent heat treatment, to thereby grow crystal grains and form grain boundary phases being rich in the R element.
The above R-Fe-B based thin film magnet exhibits improved magnetization characteristics.
© KIPO & WIPO 2007
特許請求の範囲(英語) [claim1]

[1] physically deposition was 28 45 mass % R elements (However, R is rare earths Lanthanide element type or 2 or more) including R ― Fe_B alloys, grain size is 0. 5 30 x m R 2

Having a wealth of R elements Fe 14 B Crystal and the Crystal boundary intergranular phase and complex organization to feature R-Fe_B thin-film magnet.

[2] R 2 power milligrams is the easy axis of Fe 14 B Crystal C-axis, or of claim 1 to feature oriented stands perpendicular to the film plane, R ― Fe ― B thin-film magnet.

[3] film thickness is 0. 2 ― 400/I m in claims 1 or 2 mentioned R-Fe-B thin-film magnet.

[4] R ― physical in the adult film of Fe-B alloys and subsequent heat treatment, 700 ― 120 claim characteristics to make the formation of grain boundary phase of grain growth and R elements is enriched by heating to 0 ° C, 1 or 3 mentioned R ― Fe ― B thin-film magnet fabrication.
  • 出願人(英語)
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHA
  • HITACHI METALS, LTD.
  • 発明者(英語)
  • SUZUKI SHUNJI
  • MACHIDA KENICHI
  • SAKAGUCHI EIJI
  • NAKAMURA KAZUYA
国際特許分類(IPC)
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