热处理温度对铁镍钼磁粉心功耗的影响  

Effect of heat treatment temperature on power loss of FeNiMo magnetic powder core

作　　者：李想 王浩达 商荣翔 王岳辉[1] LI Xiang;WANG Haoda;SHANG Rongxiang;WANG Yuehui(Beijing Seven Star Flight Electronic Co.,Ltd.,Beijing100015,China)

机构地区：[1]北京七星飞行电子有限公司,北京100015

出　　处：《金属功能材料》2023年第2期99-103,共5页Metallic Functional Materials

摘　　要：采用气雾化粉末制取铁镍钼磁粉心,研究了590~730℃热处理温度下铁镍钼磁粉心的磁导率、功耗变化情况。随着热处理温度的升高,磁粉心的磁导率由110升高到161;功耗先降低后升高,f=100 kHz、Bm=100 mT的条件下,在650℃热处理温度下的磁粉心具有最小的功耗,为488.2 mW/cm3。通过损耗分离可知,涡流损耗占总功耗的比例随着频率f、磁通密度Bm的增大而增大;随着热处理温度的升高,磁滞损耗不断降低,到650℃时磁滞损耗不再有明显变化;热处理温度达到730℃时,涡流损耗升高,这是由于热处理温度过高导致磁粉心内部颗粒之间的绝缘层被破坏所引起的。The magnetic permeability and power consumption of FeNiMo cores were studied at heat treatment temperatures ranging from 590to 730℃using aerosolized powder.The magnetic permeability of the cores increased from 110to 161with the increase of heat treatment temperature,and the power consumption decreased and then increased.The cores at 650℃heat treatment temperature had the smallest power consumption of 488.2mW/cm3 under the test conditions of f=100kHz and Bm=100mT.The loss separation shows that the proportion of eddy current loss to the total power loss increases with the increase of frequency fand flux density Bm with the increase of heat treatment temperature,the hysteresis loss decreases continuously,and the hysteresis loss no longer changes significantly at 650℃;The eddy current loss rises when the heat treatment temperature reaches 730℃.This is caused by the destruction of the insulation layer between the particles inside the magnetic powder core due to the high heat treatment temperature.

关 键 词：铁镍钼磁粉心 初始磁导率 功耗 损耗分离 

分 类 号：TM271.2[一般工业技术—材料科学与工程]