V_(2)O_(5)掺杂对低温烧结MnZn功率铁氧体显微结构及性能的影响  

Effect of V_(2)O_(5) doping on the microstructure and properties of low temperature sintered MnZn power ferrite

作　　者：胡秉祥 刘兴[1] 孙小龙 HU Bing-xing;LIU Xing;SUN Xiao-long(Southwest Institute of Applied Magnetics,Mianyang 621000,China)

机构地区：[1]西南应用磁学研究所,四川绵阳621000

出　　处：《磁性材料及器件》2021年第5期62-66,共5页Journal of Magnetic Materials and Devices

摘　　要：采用氧化物陶瓷工艺制备低温烧结MnZn功率铁氧体材料,研究V_(2)O_(5)掺杂对材料显微结构、烧结温度、烧结密度、收缩率、磁导率、饱和磁感应强度及功耗特性的影响。结果表明,随V_(2)O_(5)掺杂量的增加,样品平均晶粒尺寸增大,材料烧结温度降低,收缩率增大,烧结密度、磁导率及饱和磁感应强度先增高后降低,功耗先降低后增高。配方采用MnCO_(3):38.85 mol%、ZnO:10.18 mol%、Fe_(2)O_(3):50.97 mol%,基础添加Bi_(2)O_(3):1 wt%并掺杂V_(2)O_(5):0.5~0.7 wt%,可获得具有高饱和磁感应强度(B_(s)>380 mT,1.2 kA/m下测量)、低功耗功率损耗P_(cv)<500 kW/m^(3)(20℃,1 MHz,30 mT)、高磁导率(1000左右)的性能,显微结构致密,其烧结温度<950℃。Low temperature sintered MnZn power ferrite materials were prepared using oxide ceramic techniques.The influences of V_(2)O_(5)doping on the material microstructure,sintering temperature,sintering density,shrinkage,permeability,saturation magnetic induction intensity and power loss were studied.Results show that with the increase of V_(2)O_(5)amount,the average grain size increases,the sintering temperature reduces,the shrinkage increases,the sintering density,permeability and saturation magnetic induction intensity firstly increases and then reduces,and the power loss firstly decreases and then increases.For basic formula with MnCO_(3) of 38.85 mol%,ZnO of 10.18 mol%,Fe_(2)O_(3) of 50.97 mol%and doping of 1 wt%Bi_(2)O_(3) and 0.5-0.7 wt%V_(2)O_(5),the samples feature high saturation magnetic induction intensity(B_(s)>380 mT,1.2 kA/m),low power loss(P_(cv)<500 kW/m^(3),20℃,1 MHz,30 mT),high permeability(about 1000),dense microstructure,and lower sintering temperature<950℃.

关 键 词：MNZN功率铁氧体 低温烧结 V_(2)O_(5)掺杂 显微结构 性能 

分 类 号：TM277.1[一般工业技术—材料科学与工程]