http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
영구자석 스크랩으로 합성한 산화철 나노입자의 물성에 미치는 열처리 온도의 영향
홍성제,홍상혁,조아진,김용성,김병준,양수원,이재용,Hong, Sung-Jei,Hong, Sang Hyeok,Jo, Ajin,Kim, Young-Sung,Kim, ByeongJun,Yang, Suwon,Lee, Jae-Yong 한국청정기술학회 2022 청정기술 Vol.28 No.2
In this study, iron oxide (FeO<sub>x</sub>) nanoparticles were synthesized using iron (Fe) by-products recovered from NdFeB permanent magnet scraps, and the effect of heat-treatment temperature on the physical properties of the FeO<sub>x</sub> nanoparticles was investigated. In order to prepare the FeO<sub>x</sub> nanoparticles, 2.0 M ammonia (NH<sub>4</sub>OH) solution was added to an iron by-product solution diluted to c.a. 10 wt% in D.I. water, which led to the precipitation of the iron oxide precursor. Then, the FeO<sub>x</sub> nanoparticles were synthesized by heat-treatment at 300 ℃, 400 ℃, 500 ℃ and 600 ℃. After that, the physical properties of the FeO<sub>x</sub> nanoparticles were investigated in order to understand the effect of the heat-treatment temperature. The results of the X-ray diffraction (XRD) analysis showed that the diffraction peak in accordance with the <104> direction increased as the heat-treatment increased, and a diffraction peak indicating the α-Fe<sub>2</sub>O<sub>3</sub> crystal structure was detected at heat-treatment temperatures above 500 ℃. The BET specific surface area analysis revealed that the specific surface area decreased as the heat-treatment temperature increased to above 400 ℃. Observation with a high resolution transmission electron microscope (HRTEM) showed that rod-shaped nanoparticles were formed, and the size of the nanoparticles showed a tendency to increase as the heat-treatment temperature increased.