粉体粒度对锰锌软磁铁氧体性能的影响  

Influence of Powder Size on the Properties of Manganese-zinc Ferrite

作　　者：陶文俊[1] 陈文革[1] 段希萌[1] 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048

出　　处：《电工材料》2010年第3期35-39,共5页Electrical Engineering Materials

摘　　要：以不同粒度的粉体为原料,采用粉末冶金技术制备锰锌软磁铁氧体材料,比较了粉体粒度对其组织、力学性能的影响。用振动样品磁强计测量铁氧体的磁性能,结果表明,最适宜制备锰锌软磁铁氧体的粉体原料是纳米级的粉体,它可以显著提高铁氧体的力学性能及磁性能,与微米级粉体制备的锰锌软磁铁氧体相比,其饱和磁化强度明显提高,矫顽力更低。主要原因是纳米级粉体成型性好,克服了微米级粉体成型过程中会出现大量气孔的缺点。Taking advantage of the powder metallurgy technology,we prepared the Mn-Zn soft magnetic ferrite with different powder particle size.After comparing the influence of properties of microstructure,physical and mechanical by different particle size and after analysis the magnetic property by vibrating sample magnetometer,the result shows the nano-scaled powder is the best powder in the preparing process of Mn-Zn soft magnetic ferrite.Nano-scaled powder can significantly increase the mechanical and magnetic property.In the comparison with MnZn soft ferrite prepared by micron-scaled powder,the saturation intensity of Mn-Zn soft ferrite prepared by nano-scaled powder is increased obviously,and has much lower coercive force.That is mainly because the nano-scaled powder has an excellent formability which overcomes the defect of a large number of pore appearing in the forming process of micron-scaled powder.

关 键 词：锰锌(MnZn)软磁铁氧体 机械合金化 纳米级粉体 烧结 

分 类 号：TM277[一般工业技术—材料科学与工程] TM271.2[电气工程—电工理论与新技术]