M型铁氧体(Ca_(0.50)La_(0.45)Sr_(0.05))Fe_(11.25)Co_(0.35)O_α磁粉及磁体的制备  

Preparation of M-type ferrite(Ca_(0.50)La_(0.45)Sr_(0.05))Fe_(11.25)Co_(0.35)O_α magnetic powder and magnets

作　　者：郑亮[1] 姜锋[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《粉末冶金技术》2011年第2期115-119,共5页Powder Metallurgy Technology

摘　　要：采用粉末冶金工艺制备了主相组成为(Ca0.50La0.45Sr0.05)Fe11.25Co0.35Oα的M型永磁铁氧体磁粉,研究了磁粉在预烧过程中的相成分及由此磁粉制备的各向异性烧结磁体的磁性能。结果表明,最终获得的预烧磁粉由M型永磁铁氧体相和α-Fe2O3相组成,制备的烧结磁体中含有Fe2+。永磁体的磁性能为:Br=443mT,HCB=338kA/m,Hc j=426kA/m。M-type（Ca0.50La0.45Sr0.05）Fe11.25Co0.35Oαferrite magnetic powder was prepared by traditional ceramics process.The phase component of the presintered magnetic powder and magnetic properties of magnets were studied,It＇s found that presintered powder consists of M-type ferrite phase and α-Fe2O3 phase.Fe2＋ is contained in the sintered magnets.The magnetic properties of magnets are： Br=443mT,HCB=338kA/m,Hcj=426kA/m.

关 键 词：M型永磁铁氧体 离子取代 磁性能 烧结磁体 

分 类 号：TM27[一般工业技术—材料科学与工程]