비희토류 질화철계 영구자석 소재 연구 개발 동향

• 영문명: Recent progress in research and development of rare-earth free iron nitride permanent magnet
• 발행기관: 한국세라믹학회
• 저자명: 안지현(Jihyeon An) 김승한(Seunghan Kim) 박승일(Seungil Park) 김태훈(Tae-Hoon Kim)
• 간행물 정보: 『세라미스트』제27권 제2호, 229~242쪽, 전체 14쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2024.06.30

국문 초록

The high cost of rare earth materials, unstable supply and high demand remain big problems to solve for permanent magnet industries. Thus α″-Fe16N2 has been picked up as one of the most promising rare earth-free magnet candidates because of its use of environmental-friendly raw materials, confirmed giant saturation magnetic flux density (2.9 T), and reasonably high magnetic anisotropy constant (1.8 MJ/m3). Also, α”-Fe16N2 metastable with film form exhibits high tetragonality (c/a=1.1) by interstitial introduction of N atoms, leading to a high magnetocrystalline anisotropy constant (Ku = 1.0 MJ/m3). but synthesis of bulk form has lower properties than thin film (<230 nm) because of magnetic interaction, experimentally low anisotropy, and low density. In this paper, we review the synthetic methods of metastable α”-Fe16N2 with powder and bulk form and discuss the approaches to enhance magnetocrystalline anisotropy of α”-Fe16N2.

목차

1. 서론

2. 본론

3. 결론

ACKNOWLEDGEMENTS

REFERENCES

키워드

Iron nitride Nitridation Permanent magnet Rare-earth free