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Fe-Si 전기강판 폐스크랩을 이용한 연자성 분말 및 테이프 제조기술
홍원식,김상현,박지연,오철민,이우성,김승겸,한상조,심금택,김휘준,Hong, Won Sik,Kim, Sang Hyun,Park, Ji-Yeon,Oh, Chulmin,Lee, Woo Sung,Kim, Seung Gyeom,Han, Sang Jo,Shim, Geum Taek,Kim, Hwi-Jun 한국마이크로전자및패키징학회 2016 마이크로전자 및 패키징학회지 Vol.23 No.2
This study focused on examining the possibility for recycling of Fe-Si electric sheet. We manufactured Fe-6.5Si mother alloy using by Fe-Si electric sheet scrap for transformer core materials. And then, soft magnetic alloy powder which diameter and shape were $45{\sim}150{\mu}m$ and sphere type was prepared by gas atomization process. As we compared to commercial Fe-6.5Si powder, its diameter distribution and microstructure of recycled powder was a similar. To investigate the possibility of reusing the soft magnetic composite sheet for electronics, recycled powder was treated to have a high aspect ratio (AR), and we finally obtained the 65~66 AR and $2.3{\mu}m$ thickness powder. To release the residual stress of powder, heat treatment was conducted under $300{\sim}400^{\circ}C$, $N_2$ gas. And then, soft magnetic sheet was made by tape casting process using by those powders. After the density and permeability of tape was measured, and we confirmed that the recycled Fe-Si electric sheet scrap was possible to reuse the soft magnetic materials of electronics.
Fe-Si 전기강판 폐스크랩을 이용한 3원계 Fe-9.8Si-6.0Al 합금의 연자성 특성
홍원식,양형우,박지연,오철민,이우성,김승겸,한상조,심금택,김휘준,Hong, Won Sik,Yang, Hyoung Woo,Park, Ji-Yeon,Oh, Chulmin,Lee, Woo Sung,Kim, Seung Gyeom,Han, Sang Jo,Shim, Geum Taek,Kim, Hwi-Jun 한국마이크로전자및패키징학회 2017 마이크로전자 및 패키징학회지 Vol.24 No.1
Fe-9.8Si-6.0Al mother alloy was manufactured using by Fe-3.5Si recycled scrap and Si powder. And then, soft magnetic alloy powder of $D_{50}$ size and sphere type were prepared by gas atomization process. To obtain the soft magnetic powder of a high aspect ratio, in the first, we conducted the ball milling process for 8 hours. And heat treatment was performed under $650^{\circ}C$, 2 hours and $N_2$ atmosphere condition for reducing the residual stress of the powder. Based on these process, we made around $50{\mu}m$ diameter Fe-9.8Si-6.0Al powder, which morphology and shape was a similar to the commercial Fe-Si-Al powder. Finally, the soft magnetic sheets were prepared by tape casting process using by those powders. The permeability of the tape casting sheet was measured, and we confirmed the possibility of reusing to the soft magnetic materials of Fe-Si electric sheet scrap.