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Magnetic properties of large-scaled MnBi bulk magnets
- Authors
- Kim, Sumin; Moon, Hongjae; Jung, Hwaebong; Kim, Su-Min; Lee, Hyun-Sook; Choi-Yim, Haein; Lee, Wooyoung
- Issue Date
- Jun-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- MnBi bulk; Rapid-solidification; Sintering; Magnetic properties
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.708, pp 1245 - 1249
- Pages
- 5
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 708
- Start Page
- 1245
- End Page
- 1249
- ISSN
- 0925-8388
1873-4669
- Abstract
- We investigated the magnetic properties of large, compacted, sintered MnBi bulk magnets with dimensions of 20.3 x 15.3 x 10.3 mm(3). To obtain a high content of the low-temperature- phase (LTP) of MnBi in the precursor powders, a new process was implemented and produced about 98 wt% of LTP. To improve the coercive field of MnBi, particle sizes were controlled using different milling techniques. The dependence of magnetic properties of the bulk magnets on the particle size was analyzed. The highest maximum energy product, (BH)(max), obtained among our samples was 7.3 MGOe. This is the first report of demonstrating high performance in large-sized MnBi bulk magnets. (C) 2017 Published by Elsevier B.V.
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