Magnetic Properties of NiZn-ferrite Synthesized from Waste Iron Oxide Catalyst

산화철 폐촉매로부터 합성된 NiZn- 페라이트의 자기적 특성

  • Hwang, Yeon (Department of Materials Science & Engineering, Seoul National University of Technology) ;
  • Kwon, Soon-Kil (R &D Center, Agency for Defence Development) ;
  • Lee, Hyo-Sook (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources) ;
  • Je, Hae-June (Korea Institute of Science & Technology) ;
  • Park, Sang-Il (Department of Materials Science & Engineering, Seoul National University of Technology)
  • 황연 (서울산업대학교 재료공학과) ;
  • 권순길 (국방과학연구소 기술연구본부) ;
  • 이효숙 (한국지질자원연구원 자원활용연구부) ;
  • 제해준 (한국과학기술연구원 재료연구부) ;
  • 박상일 (서울산업대학교 재료공학과)
  • Published : 2001.12.01

Abstract

NiZn-ferrite was synthesized from waste catalysts, which were produced from styrene monomer process and buried underground as an industrial wastes, and its magnetic properties were investigated. Nickel oxide and zinc oxide powders were mixed with finely ground waste catalysts, and spinel type ferrite was obtained by calcination at 900$\^{C}$ and sintering at 1230$\^{C}$ for 5 hours. The intial permeability was measured and reflection loss was calculated from S-parameters for the composition of Ni$\_$x/Zn$\_$1-x/Fe$_2$O$_4$(x=0.36, 0.50, 0.66). NiZn-ferrite synthesized from waste iron oxide catalyst showed a feasibility for the use as electromagnetic wave absorber in X-band.

석유화학 공정 중 Styrene(SM) 공정에서 발생되는 산화철 폐촉매는 산업 폐기물로서 전량 매립되고 있는데, 이를 출발 원료로 사용하여 NiZn-페라이트를 합성하였고 그 자기적 특성을 조사하였다. 산화철 폐축매 펠렛을 분쇄한 후 NiO 및 ZnO를 혼합하여 90$0^{\circ}C$에서 하소하고 123$0^{\circ}C$에서 5시간 소결하여 스핀넬형 페라이트 소결체를 얻었다. N $i_{x}$ Z $n_{1-x}$F $e_2$ $O_4$(x=0.36, 0.50, 0.66)조성에 대하여 초투자율을 측정하였고, S-parameter를 측정하여 반사 감쇄량을 계산하였다. 산화철 폐촉매를 이용하여 X-band 주파수 영역에서 높은 전자파 흡수능을 갖는 전파흡수체를 제조할 수 있음을 확인하였다.다.

Keywords

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