复合助烧剂(B+Bi)对钙镧钴铁氧体结构和性能的影响  

Effect of composite sintering aids on the microstructure and properties of CaLaCo ferrite

作　　者：刘辉 魏汉中 全小康 谢光环 贾立颖 LIU Hui;WEI Han-zhong;QUAN Xiao-kang;XIE Guang-huan;JIA Li-ying(BGRIMM Magnetic Materials&Technology Co,Ltd,Beijing 102600,China;National Engineering Research Center for Magnetic Materials,BGRIMM Technology Group,Beijing 102600,China)

机构地区：[1]北矿磁材科技有限公司,北京102600 [2]矿冶科技集团国家磁性材料工程技术研究中心,北京102600

出　　处：《磁性材料及器件》2022年第1期53-56,共4页Journal of Magnetic Materials and Devices

摘　　要：通过添加(B+Bi)复合助烧剂制备CaLaCo永磁铁氧体预烧料。对预烧料的晶体结构进行分析,发现添加复合助烧剂可以降低反应所需的预烧温度,提高饱和磁化强度(σ_(s)),晶粒间的粘连明显减少,并在烧结过程中抑制了主相和晶界相间成分的相互扩散,有利于提升M相成分间相互匹配的程度和相纯度,从而获得了更高的磁体性能。磁性能为:B_(r)=454 mT,H_(cb)=334 kA/m,H_(cj)=393 kA/m,(BH)_(max)=39.2 kJ/m3。By adding composite sintering additives B+Bi,the pre sintered material of CaLaCo ferrite was prepared.By analyzing the crystal structure of the pre sintered materials,it is found that the pre sintered temperature required is reduced,the saturation magnetization(σ_(s))is increased.And the adhesion between grains decreased obviously.The results show that the mutual movement of the main phase and grain boundary phase is restrained during the sintering process,which is conducive to improve the degree of matching of M phase components and the phase purity,and obtain higher magnet performance.The magnetic properties are as follow:B_(r)=454 mT,H_(cb)=334 kA/m,H_(cj)=393 kA/m,(BH)_(max)=39.2 kJ/m3.

关 键 词：CaLaCo铁氧体 助烧剂 预烧温度 结构 性能 

分 类 号：TM277.5[一般工业技术—材料科学与工程]