摘要
采用高性能的各向异性ＨＤＤＲ－Ｎｄ－Ｆｅ－Ｂ磁粉和铁氧体磁粉与塑料复合，制成了各向异性粘结ＮｄＦｅＢ／铁氧体复合永磁材料，研究了它们的磁性能。结果表明，随ＨＤＤＲ－Ｎｄ－Ｆｅ－Ｂ含量增加，各向异性的塑料粘结ＨＤＤＲ－Ｎｄ－Ｆｅ－Ｂ／铁氧体复合永磁材料磁性能ｂＨｃ和密度几乎是线性增大，而ｊＨｃ，（ＢＨ）ｍａｘ和Ｂｒ开始都增大，当达到一定值后基本保持不变，出现一平台，随后又继续增大，但ｊＨｃ与Ｂｒ和（ＢＨ）ｍａｘ的平台值所对应的铁氧体／ＨＤＤＲ－Ｎｄ－Ｆｅ－Ｂ的比例却不一样。这是由于这两种不同磁性能的磁粉混合后颗粒之间的相互作用随着混合比例也会发生变化所致。同时环氧树脂种类也对ＨＤＤＲ－ＮｄＦｅＢ／铁氧体的磁性能有显著影响。
The anisotropic permanent magnetic composite consisting of HDDR-Nd-Fe-B,ferrite powder and plastic has been prepared,and their magnetic properties have been studied.The experimental results show that magneitc properties b H c and density of anisotropic HDDR-Nd-Fe-B/ferrite permanent magnetic composite almost increase linearly by adding HDDR-NdFeB.However,the magneitc properties j H c,Br, (BH) max, rise with the increasement of HDDR-Nd-Fe-B,when they attain to a value,change a little with the increasement of HDDR-NdFeB,after that,they continue to increase with HDDR-NdFeB increasement.The proportion of ferrite and HDDR-NdFeB powder is different when there is little increasement of j H c, B r and ( BH) max.This is due to that there is different interaction between magnetis powder with different magnetic property along with the change of proportion of ferrite and HDDR-NdFeB.The type of epoxy resin influences obviously on the magnetic property of the anisotropic permanent magnetic composite consi
出处
《功能材料》
EI
CAS
CSCD
北大核心
1999年第4期352-352,360,共2页
Journal of Functional Materials
关键词
粘结永磁材料
各向异性
HDDR-Nd-Fe-B
铁氧体
磁性能
bonded permanent magnetic material
anisotropic
HDDR-Nd-Fe-B
ferrite
magnetic propertysting of HDDR-Nd-Fe-B and ferrite,the reason is that epoxy resin affects on the orientation percent of HDDR-NdFeB and ferrite particles during magnetic field pressing.
