丝网印刷及磁场取向制备钡铁氧体厚膜研究  

Study on Barium Ferrite Thick Films by Screen Printing and Magnetic Orientation

作　　者：陈中艳[1] 冯则坤[1] 熊炫[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《磁性材料及器件》2010年第2期22-24,45,共4页Journal of Magnetic Materials and Devices

摘　　要：采用丝网印刷工艺在氧化铝陶瓷基片上制备了六角钡铁氧体厚膜,研究了外加磁场对厚膜磁特性的影响,用扫描电镜(SEM)、X射线衍射仪(XRD)和振动样品磁强计(VSM)对样品进行表征。结果表明,垂直膜面磁场取向后,剩余磁化强度(Mr)大大增加。随着取向磁场的增高,矩形比(Mr/Ms)由未取向时的0.54提高到0.84。可以通过增加膜的致密度和消除不均匀性来进一步提高矩形比。该厚膜具有自偏置特性,在自偏置微波器件中具有应用潜力。We prepared barium hexaferrite thick films by screen printing technology on a alumina substrate, and studited the effect of applied field on the magnetic properties of the thick films. The samples were characterized by scanning electron microscopy（SEM）, X-ray diffraction（XRD）, and vibrating sample magnetometry （VSM）. The results indicated that remanent magnetization （Mr） was greatly enhanced when applying magnetic field perpendicular to the film plane, and hysteresis loop squareness（Mr/Ms）increases from 0.54 to 0.84 with increasing the magnetic field, and the higher Mr/Ms values can be achieved by increasing film density and eliminating inhomogeneous. The film demonstrates self-bias properties, and has potential applications in self-biasing microwave devices.

关 键 词：钡铁氧体厚膜 丝网印刷 磁场取向 矩形比 

分 类 号：TM277[一般工业技术—材料科学与工程]