摘要
通过高能球磨将添加剂纳米化，研究了其对永磁铁氧体（样品）磁性能和微观结构的影响。结果表明：添加剂的平均粒度从216.448μm减小到65nm时，有效降低了磁体的熔点，提高其致密化。1190℃烧结时磁体的Br和Hcj分别从404mT、366kA·m^-1提高到418mT和402kA·m^-1。SEM观察样品晶粒平均粒径在1-2μm，晶粒分布更加均匀。取向度从75.2%提高到84.0%。
The influences of nanoadditive prepared by high-energy ball milling on the magnetic properties and microstructures of permanent ferrite （samples） were investigated. The results show that the average particle size of additive is reduced from 216.448 um to 65 nm, which effectively dearease magnet＇s melting point and improve its densification, Br and Hcj are both increased from 404 mT and 366 kA · m^-1 to 418 mT and 402 kA · m^-1 when magnet is sintered at 1 190 ℃. The sample observed by SEM shows that grain＇s average size is 1-2 um and grain distribution is more uniform. Degree of orientation is increased from 75.2% to 84.0%.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2008年第11期28-31,共4页
Electronic Components And Materials
基金
上海市2006年联盟计划资助项目(No.ZX2006-28)
科技部科技型中小企业创新基金资助项目(No.07C26113100349)
关键词
无机非金属材料
永磁铁氧体
纳米添加剂
高能球磨
微观结构
磁性能
non-metallic inorganic material
permanent ferrite
nano additive
high-energy ball milling
microstructure
magnetic properties
