http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Ti-Getter가 Ti<SUB>0.96</SUB>Co<SUB>0.02</SUB>Fe<SUB>0.02</SUB>O₂의 자기적 특성에 미치는 영향
남효덕(H. D. Nam),김성진(S. J. Kim),백종근(J. K. Baek),이상률(S. R. Lee),박철수,김응찬(E. C. Kim) 한국자기학회 2008 韓國磁氣學會誌 Vol.18 No.3
The samples were synthesized by using a solid state reaction. The X-ray diffraction pattern for Ti<SUB>0.96</SUB>Co<SUB>0.02</SUB>Fe<SUB>0.02</SUB>O₂ showed a pure rutile phase with tetragonal structure, Mixtures of the proper proportions of the elements sealed in evacuated quartz ampoule were heated at 870~930 ℃ for one day and then slowly cooled down to room temperature at a rate of 10 ℃/h. In order to obtain single phase material, it was necessary to grind the sample after the first firing and to press the powders into pellets before annealing them for a second time in evacuated and sealed quartz ampoule. Magnetic properties have been investigated using the vibrating sample magnetometer (VSM). Room temperature magnetic hysteresis (M-H) curve showed an obvious ferromagnetic behavior and the magnetic moment per Fe atom under the applied of 0.8 T was estimated to be about 1.5 μB/CoFe. But the magnetic moment per Fe atom under the applied of 0.8 T was estimated to be about 0.02 μB/CoFe without Ti-getter. Size of particles is about 1 ㎛ using the transmission electron microscope (TEM). The ingredients of sample are distributed irregular in particles. Only Fe get shown on the surface of particles.
Stainless steel공장 발생분진의 효과적인 재활용을위한·분리 ·집진 기술개발
남효덕,김응찬 嶺南大學校 基礎科學 硏究所 1998 基礎科學硏究 Vol.18 No.-
A new concept of magnetic filtering technique was embodied by manufacturing an electromagnetic type magnetic filter. This device has been built and identified as a tool for separating the magnetic oxide. particles from non-magnetic particles produced from stainless steel melting process. Preliminary studies were carried out to conform the filtering recovery as a function of magnetic field strength. The recovery yield of magnetic oxides particles was found to be almost constant regardless of the applied magnetic field as far as both the pair of magnetic poles are parallel each, other. The recovery yield of magnetite oxides such as(Zn, Cu, Fe)(Ni,Fe)O₄composition was 94∼96 wt.% and the rest were non-magnetic oxides in(Fe,Cr)₂O₃, (Fe, Mn)O type or CaO based slags. During the course of present research a ?? spectroscopy to find out an exact composition of magnetic oxides particles has been established.