FeNiMo/SiO_(2)复合粉芯的制备与软磁性能调控  

Preparation of FeNiMo/SiO_(2)composite core and regulation of soft magnetic properties

作　　者：熊政伟[1,4] 杨江 王雨[2] 杨陆 管弦 曹林洪 王进 高志鹏[3] Xiong Zheng-Wei;Yang Jiang;Wang Yu;Yang Lu;Guan Xian;Cao Lin-Hong;Wang Jin;Gao Zhi-Peng(Joint Laboratory for Extreme Conditions Matter Properties,School of Mathematics and Physics,Southwest University of Science and Technology,Mianyang 621010,China;China Electronics Technology Group Corporation 9th Research Institute,Mianyang 621010,China;Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China;Sichuan Civil-military Integration Institute,Mianyang 621010,China)

机构地区：[1]西南科技大学数理学院,极端条件物质特性联合实验室,绵阳621010 [2]中国电子科技集团公司第九研究所,绵阳621010 [3]中国工程物理研究院流体物理研究所,绵阳621900 [4]四川省军民融合研究院,绵阳621010

出　　处：《物理学报》2022年第15期248-256,共9页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11904299,U1930124)资助的课题。

摘　　要：目前金属软磁粉芯材料在高频电感等电子元件的应用前景广阔,然而其主要的构成元素属于过渡金属,表面易形成致密的氧化层,影响其软磁性能的调控.为了解决这些问题,本文引入H_(2)/Ar混合气体高温预处理工艺对FeNiMo原粉进行还原,证实了还原性气氛高温处理可以有效地去除材料表面的金属氧化物,增加金属单质的含量,进而显著提升FeNiMo原粉的有效磁导率.对预处理后的FeNiMo粉末进行SiO_(2)绝缘包覆,所获得的FeNiMo/SiO_(2)软磁复合材料表面包覆均匀;与未处理FeNiMo原粉包覆SiO_(2)所形成的软磁复合粉芯相比,H_(2)/Ar混合气体高温预处理后的FeNiMo/SiO_(2)具有更高的有效磁导率、更低的损耗.与同类其他软磁复合粉芯相比,通过H_(2)/Ar混合气体高温预处理工艺和绝缘包覆工艺的协同效应,所制备的FeNiMo/SiO_(2)复合粉芯具有优异的软磁性能.因此经过还原性气氛高温预处理工艺后的绝缘包覆可以更大程度地提升软磁粉芯复合材料的有效磁导率,降低其损耗,为软磁复合粉芯材料性能的提升提供了一种新的策略.Nowadays,metal soft magnetic materials are mainly used in electronic components such as high-frequency inductors.Since all the elements in the soft magnetic alloys are transition metals,dense oxide layer is easily formed on their surfaces,which can affect the regulation of soft magnetic properties.In order to solve the problems,in this work,an innovative high-temperature pretreatment process in H_(2)/Ar mixture is adopted to pretreat FeNiMo raw powders.We confirm that the high temperature treatment in reducing atmosphere can effectively remove metal oxides from the FeNiMo material surface and increase the content of elemental states,thereby further significantly improving the effective permeability of FeNiMo raw powders.The pretreated FeNiMo powder is evenly coated with SiO_(2) layers,forming the FeNiMo/SiO_(2) soft magnetic composites.Compared with the untreated FeNiMo powder coated with SiO_(2),the FeNiMo/SiO_(2) pretreated with H_(2)/Ar mixture gas at high temperatures has high effective permeability and low loss.Our FeNiMo/SiO_(2) cores prepared by the synergistic effect of high-temperature pretreatment process in H_(2)/Ar mixture and insulation coating process have more excellent soft magnetic properties than other iron-based soft magnetic composites.Therefore,the insulation coating after being pretreated at high temperature in reducing atmosphere can greatly improve the permeability and reduce the core loss of soft magnetic composites.This will provide a new strategy for enhancing the soft magnetic properties of the composite cores.

关 键 词：FeNiMo SiO_(2)包覆 热处理 磁性能 

分 类 号：TB333[一般工业技术—材料科学与工程]