升温速率对Micro-FAST制备锰锌铁氧体磁芯显微组织及性能的影响  

Effects of Heating Rates on Microstructure and Properties of MnZn Ferrite Magnetic Cores Prepared by Micro-FAST

作　　者：冯卫东 屈立 王维 杨刚[2] 吴明霞[2] FENGWeidong;QULi;WANGWei;YANGGang;WUMingxia(Yibin Sun Display Co.,Ltd.,Yibin 644007,China;School of Mechanical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]宜宾盈泰光电有限公司,四川宜宾644007 [2]四川大学机械工程学院,四川成都610065

出　　处：《热加工工艺》2024年第14期138-141,146,共5页Hot Working Technology

基　　金：国家自然科学资金项目(51675357);2021年宜宾市科技计划项目(2021GY004);四川大学-宜宾市人民政府校市战略合作专项资金项目(2020CDYB-20)。

摘　　要：采用多物理场耦合烧结技术(Micro-FAST)烧结制备了MnZn铁氧体U型磁芯零件,研究了升温速率对MnZn铁氧体磁芯的微观组织和性能的影响。结果表明:在升温速率30℃/s、压力75 kg、烧结温度900℃、保温时间360 s的条件下,烧结制备磁芯的密度4.87 g/cm^(3)、饱和磁化强度55.78 emu/g、剩磁1.59 emu/g、矫顽力14.83 Oe、电阻率3.88Ω·m。适当提高升温速率,可增大磁芯的密度、减少孔隙、促进尖晶石相晶粒的形核与生长以及微观组织均匀完整,从而有利于提高MnZn铁氧体磁芯的磁性能。MnZn ferrite U-type magnetic core parts were prepared by multi-physical fields coupling sintering technology(Micro-FAST),and the effects of heating rates on the microstructure and properties of MnZn ferrite cores were investigated.The results show that under the temperature increasing rate of 30℃/s,pressure of 75 kg,sintering temperature of 900℃ and insulation time of 360 s,the sintered core has a density of 4.87 g/cm^(3),saturation magnetization of 55.78 emu/g,residual magnetism of 1.59 emu/g,coercive force of 14.83 Oe,and resistivity of 3.88Ω·m.With the increase of heating rate,the density of the magnetic core increases,the pores reduce,the nucleus and growth of the spinel phase grains are promoted,and the microstructure is more even,so that the magnetic properties of the MnZn ferrite magnetic core improve.

关 键 词：MNZN铁氧体 多物理场耦合烧结 升温速率 显微组织 性能 

分 类 号：TG141[一般工业技术—材料科学与工程]