酸化物超伝導体の合成と特性　スプレー造粒粉を用いたＮｄ‐Ｆｅ‐Ｂ焼結磁石の磁気特性

• 山下 治

  住友特殊金属(株)研究開発部

• 岸本 芳久

  住友金属工業(株)未来技術研究所

書誌事項

タイトル別名

• Magnetic Properties of Nd-Fe-B Magnets Sintered Using Granulated Powders by Spray Drying Method.
• スプレー ゾウリュウ フン オ モチイタ Nd Fe B ショウケツ ジシャク

抄録

Nd-Fe-B alloy powder was granulated by spray drying method using polyvinylalcohol (PVA) binder in the range from 0.1wt% to 0.5wt%, in order to improve the powder flowability during feeding and compacting. After adding PVA binder, glycerin and pure water to alloy powder, the slurry was stirred at 278K to suppress the oxidation of alloy powder. The granulated powders exhibited a high flowability with the increase of PVA content. By heating in H2 at 673K for 0.5H after compacting in the magnetic field, about 90% of carbon in binder was removed, although the oxygen in binder remained unremoved. With the compacted body added 0.20wt% PVA, these treatments can allow to suppress the residual contents of oxygen and carbon in the resulted sintered magnets within less than 8000ppm and 900ppm, respectively. The highest coercive force (iHc) and maximum energy product (BH) max for a sintered anisotropic magnet prepared by the above mentioned process are 1.06(MA/m) and 286.5(kJ/m³), respectively.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 43 (2), 249-255, 1996

  一般社団法人 粉体粉末冶金協会

キーワード

• spray drying
• polyvinylalcohol binder
• Nb-Fe-B magnet

詳細情報

• CRID: 1390282681283748864
• NII論文ID: 10002011427
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.43.249
• COI: 1:CAS:528:DyaK28XhslKgs7k%3D
• ISSN: 18809014
• ISSN: 05328799
• ISSN: http://id.crossref.org/issn/05328799
• NDL書誌ID: 3926728
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3926728
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可