磁铅石结构新钙系铁氧体的制备与磁性能  

Preparation and Magnetic Properties of Novel Calcium Ferrite with Magnetoplumbite Type

作　　者：刘先松[1] 王超[1] 冯双久[1] 阮征[1] 

机构地区：[1]安徽大学,磁性材料安徽省工程技术研究中心,安徽合肥230039

出　　处：《稀有金属材料与工程》2014年第2期364-368,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51072002,51272003);安徽省教育厅重点科研项目(KJ2010A008,KJ2012A027);安徽大学“211工程”学术创新团队(02303402)

摘　　要：采用陶瓷法成功地制备了磁铅石结构新钙系铁氧体,利用X射线衍射分析仪(XRD),扫描电镜(SEM),振动样品磁强计(VSM)和B-H分析仪,对产物的晶型、结构、微观形貌和磁性能进行研究。结果表明,Ca2+-La3+-Co2+联合取代可以显著提高磁铅石结构铁氧体的磁性能。与镧钴锶铁氧体相比,剩磁、磁感应矫顽力、内禀矫顽力和最大磁能积均有明显的提高。这种烧结磁体变小、变薄后,仍能保持高的剩余磁通密度。Novel calcium ferrites with magnetoplumbite structure were prepared by the ceramic technology. The structure, the morphology and the magnetic properties of the samples were investigated systematically by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, vibrating-sample magnetometer （VSM） and B-H hysteresis curve measurements. The experimental results show that the magnetic properties of calcium ferrites with Ca2＋-La3＋-Co2＋ substitution can be significantly improved. The remanence, the magnetic induction coercivity, the intrinsic coercivity and the maximum magnetic energy of calcium ferrites have a significant improvement compared with that of strontium ferrites substituted by La3＋-Co2＋. In addition, the high residual flux density of the magnet can be still kept even the sintered magnet is thin and small.

关 键 词：M型 钙系铁氧体 磁性能 

分 类 号：TM277[一般工业技术—材料科学与工程]