磷酸含量对FeSiCr@磷酸盐/硅酸钠软磁粉芯性能的影响  

Effect of phosphoric acid concentration on performance of FeSiCr@phosphate/sodium silicate soft magnetic powder cores

作　　者：王璞 刘佳奇 王成飞 朱争取 庞靖 张家泉[1] WANG Pu;LIU Jiaqi;WANG Chengfei;ZHU Zhengqu;PANG Jing;ZHANG Jiaquan(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Qingdao Yunlu Advanced Materials Technology Co.Ltd.,Qingdao 266232,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]青岛云路先进材料技术股份有限公司,山东青岛266232

出　　处：《中南大学学报（自然科学版）》2024年第8期2879-2886,共8页Journal of Central South University:Science and Technology

基　　金：山东省重点研发计划项目(2022CXGC020308)。

摘　　要：基于粉末冶金工艺制备FeSiCr@磷酸盐/硅酸钠软磁粉芯,采用扫描电镜(SEM)、X射线衍射(XRD)与盐雾等实验方法与损耗分离计算,探究不同磷酸含量(质量分数为0~1.5%)对FeSiCr复合粉芯软磁性能与耐蚀性的影响。研究结果表明,适度增加磷酸含量,可提高磁粉芯相对密度与直流偏置性能,并显著降低磁粉芯损耗。但过高的磷酸含量会降低绝缘层均匀性,增加磁畴壁运动的阻力,导致磁粉芯损耗增加与磁导率下降。此外,磁粉芯耐蚀性也随磷酸含量增加而下降。当磷酸质量分数为1.0%时,FeSiCr磁粉芯具备最优综合软磁性能,磁导率为38.3(100 kHz时),损耗为646.24 mW/cm^(3)(1 MHz与20 mT时)。FeSiCr@phosphate/sodium silicate soft magnetic powder cores were prepared based on the powder metallurgy process.Experimental methods such as scanning electron microscopy(SEM),X-ray diffraction(XRD)and salt spray with loss separation calculations were used to investigate the effects of different mass fractions of phosphoric acid(0−1.5%)on the soft magnetic properties and corrosion resistance of FeSiCr powder cores.The results show that the density and direct current bias performance of the magnetic powder core can be improved by moderately increasing the phosphoric acid concentration,and the core loss can also be significantly reduced.However,excessive phosphoric acid concentration will deteriorate the uniformity of the insulating layer and increase the resistance to the movement of the domain walls,leading to the increase in the core loss and decrease in the permeability.In addition,the corrosion resistance of the magnetic powder core decreases with the increase of phosphoric acid concentration.When the phosphoric acid addition is 1.0%,the prepared FeSiCr magnetic powder core has the optimum soft magnetic performance with permeability of 38.3(100 kHz)and the total loss of 646.24 mW/cm^(3)(1 MHz and 20 mT).

关 键 词：FeSiCr合金 软磁粉芯 绝缘包覆 软磁性能 耐蚀性能 

分 类 号：TB33[一般工业技术—材料科学与工程]