Co2Z钡锶铁氧体材料的高频磁性能杨锴.pdf

Co Z 2 , 610054 Sr2+ Ba2+Co Z Ba Sr Co Fe O 2 1.5 1.5 2 24 41 XRD Q 1GHz 1220 1280 Q 1GHz Q 1GHz 1280 2h1240 3h 4.2Q 1GHz 11.31.8GHz Co2Z TM277 A 1001-3830(2013)03-0012-04 High-frequency magnetic properties of Co Z barium strontium 2 ferrite materials YANG Kai, LIU Ying-li, LI Yuan-xun, PAN Xin-qiang, QI Wei-cheng, ZHANG Huai-wu State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China Abstract Sr-doped Co Z barium ferrite materials (Ba Sr Co Fe O ) were prepared by conventional ceramic 2 1.5 1.5 2 24 41 technique, and influence of preparation process, such as presintering temperature, sintering temperature and sintering atmosphere on their magnetic properties was investigated. The morphology and phase composition of the materials were tested by scanning electron microscope(SEM) and X-ray diffraction(XRD). The result shows that, the initial permeability decreases and quality factor(1GHz) increases with increasing presintering temperature from 1250 to 1280 . The initial permeability increases and the quality factor(1GHz) decreases with increasing sintering temperature from 1220 to 1280 . When the sintering atmosphere is changed from air to oxygen the initial permeability reduces, and the quality factor(1GHz) increases. The optimun magnetic properties were obtained for sam