摘要
研究了具有超低温度系数、辐射取向和辐射多极取向、高电绝缘三种特殊用途的２：１７型稀土钴基永磁体及制作方法。经温度补偿的磁体剩磁平均可逆温度系数达到.５０×４５×２．５（ｍｍ）辐向环磁性能为：Ｂｒ＝１．０２Ｔ，ｉＨｃ＝１０８０ｋＡ／ｍ，（ＢＨ）ｍａｘ＝１８８ｋＪ／ｍ３。高电绝缘磁体性能为：体积电阻车＝１×１０５ －ｃｍ２／ｍ，Ｂｒ＝０．６８Ｔ，ｉＨｃ＝８００ｋＡ／ｍ，（ＢＨ）ｍａｘ＝７３．６ｋＪ／ｍ３，在５００ｋＨｚ，６６．４ｋＡ／ｍ磁场中磁化，回复剩磁不可逆损失小于１．４７％。
2:17 type RE cobalt base magnets with super low temperature coefficient,radial orientation and high electrical insulation were investigated. The magnets have beentested in special environments. The reversible temperature coefficient of remanent is α20-150℃< -1 × 10-5/℃ for the compensation magnets. The magnetic properties of radial rings with 50× 45× 2.5 (mm) are Br = 1'.02T, iHc =1080kA/m and (BH)max= 188kJ/m3. The proper-ties of magnets with high electrical insulation are as follows: volume electric-resistivityp = 1 × 105 -cm2/m, Br=0.68T, iHc=800kA/m and (BH)max=73.6kJ/m3. Irreversible loss ofrecoil remanence are less than 1.47% at f=500kHz and H=66.4kA/m.
出处
《金属功能材料》
CAS
1999年第4期161-168,共8页
Metallic Functional Materials
关键词
2:17型稀土钴基永磁体
低温度系数
辐向取向
电绝缘
2: 17 type ER cobalt base magnets
low temperature coefficient
radialorientation
electrical insulation
