Nd-Fe-B permanent magnets have been used in a wide variety of applications because of their high magnetic flux density. So, demand for neodymium has been increasing in worldwide. In this study, an electrowinning process was performed in LiF-NdF3-Nd2O3 high temperature molten salts. However, a corrosion resistant material for use in the molten salt must be found for stable operation because of the harsh corrosion environment of the electrowinning process. Therefore, for this paper, boron nitride(BN), aluminum nitride(AlN), and silicon nitride(Si3N4) were selected as protective and structural materials in the high temperature electrolyte. To investigate the characteristics of BN, AlN, and Si3N4, in molten salts, materials were immersed in the molten salts for 24, 72, 120, and 192 hours. Also, surface condition and stability were investigated by SEM and EDS and corrosion products were calculated by HSC chemistry. As a result, among BN, AlN, and Si3N4, AlN was found to show the best protective material properties.

1. 서 론
2. 실험 방법
3. 결과 및 토의
4. 결 론
Acknowledgement
References

• 권숙철(충남대학교 에너지과학기술대학원) | Sukcheol Kwon
• 이영준(충남대학교 에너지과학기술대학원) | Young-Jun Lee
• 류홍열(한국기초과학지원연구원) | Hong-Youl Ryu
• 이고기(포항산업과학기술연구원) | Go Gi Lee
• 조성구(포항산업과학기술연구원) | Sung Koo Jo
• 이종현(충남대학교 에너지과학기술대학원, 충남대학교 신소재공학과) | Jong-Hyeon Lee Corresponding author