Magnetic Properties of Nd-Fe-B Magnets Sintered Using Granulated Powders by Spray Drying Method.
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- Yamashita Osamu
- Research & Development Department, Sumitomo Special Metals Co. Ltd.
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- Kishimoto Yoshihisa
- Advanced Technology Research Laboratories, Sumitomo Metal Industries, Ltd.
Bibliographic Information
- Other Title
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- 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
- 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
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Abstract
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.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 43 (2), 249-255, 1996
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390282681283748864
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- NII Article ID
- 10002011427
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- NII Book ID
- AN00222724
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- COI
- 1:CAS:528:DyaK28XhslKgs7k%3D
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- ISSN
- 18809014
- 05328799
- http://id.crossref.org/issn/05328799
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- NDL BIB ID
- 3926728
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed