铁粉含量对自蔓延高温合成锰锌铁氧体粉料的影响  

SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS OF MnZn-FERRITE POWDER

作　　者：杨珂[1] 郭志猛[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《粉末冶金工业》2006年第6期18-22,共5页Powder Metallurgy Industry

基　　金：国家自然科学基金(20476008)

摘　　要：在常压空气自蔓延高温合成锰锌铁氧体粉料研究中,采用XRD、SEM、VSM讨论了铁粉含量对燃烧反应、燃烧产物物相、形貌及磁性能的影响。结果表明:燃烧合成温度和燃烧合成的速度随着燃料铁粉含量k的增大而增大,在k=0.8时获得最大值而后有所下降。燃烧合成反应的激活能为22.74 kJ/mol和123.3 kJ/mol。当铁粉含量k=0.6时,可获得铁氧体化较完全的锰锌铁氧体料粉,其燃烧合成速度为1.93 mm/s,燃烧温度约1 593 K;其比饱和磁化强度为64.4 A.m2.kg-1,比剩磁强度为1.349 A.m2.kg-1,矫顽力为0.24 kA.m-1。该粉料平均粒径为1.42μm。In the process of self- propagating high temperature synthesis（SHS）of Mn- Zn ferrite in normal air atmosphere, the effect of iron content on combustion reaction, the phase, the microstructure and the magnetic properties of the combustion products was investigated by XRD, SEM and VSM analysis. The results show that：combustion temperature and combustion velocity increase with the iron content in fuel, k, and reach the maximum at k = 0.8. The activation energy of the combustion 22.74 kJ/mol and 123.3 kJ/mol.At k = 0.6, the powder was highly ferritized, combustion velocity was 1.93 mm/s and highest combustion temperature was 1593 K. The powder prepared possessed good magnetic properties： σs = 64.44A·m^2·kg^-1, σx= 1.349 A·m^2·kg^-1 ,Hc =0.24 kA·m^-1,and the mean particle diameter was 1.42μm.

关 键 词：铁粉含量 自蔓延高温合成 锰锌铁氧体 磁性能 

分 类 号：O614.811[理学—无机化学]