摘要
为探讨燃烧合成法制备Ni0.4Zn0.6Fe2O4粉末工业化放大合成的可行性,研究不同反应物量对燃烧合成制备的Ni0.4Zn0.6Fe2O4粉体及烧结后产物的物相、微观形貌及磁性能的影响,对终产物进行XRD、SEM和EDS分析,对样品经行磁性能测试.结果表明:Fe-Fe2O3-Zn O-Ni O体系燃烧合成过程是以扩散-溶解-析出机制进行的,燃烧反应在非平衡条件下进行,燃烧产物的主要物相为Ni-Zn铁氧体,其中存在Zn O及一些铁的氧化物的杂质,产物经热处理后物相全部转变为尖晶石结构;随着反应物量的增加,产物颗粒尺寸增大,均匀度增加,反应物量的增加对产物的磁性能影响不大;随着反应物量的增加,饱和磁化强度逐渐增加,矫顽力基本不变,反应物量为1 500 g时制备的产品磁性能最佳,具有较高的饱和磁化强度Ms=63.72 emu/g和较低的矫顽力Hc=15.61 Oe.
To study the feasibility of enlarge the industrial Ni0.4Zn0.6Fe2O4 powder synthesis with combustion synthesis method,The influence of different amount of reactants on phase composition,mocrotopography and the magnetic properties of samples were studied. The products were characterized by X-ray diffraction（ XRD） and scanning microscopy（ SEM） and energy dispersive spectrometer（ EDS）. The results indicated that the synthesis process of Fe- Fe2O3- Zn O- Ni O reaction system is a diffusion-dissolution-precipitation mechanism. And the combustion reaction under at non-equilibrium conditions. The main phase is Ni-Zn ferrite,and contain trace of Zn O and the iron oxide impurities. After annealed,the phase shift to the spinel structure completely. With the amount of reactant increased,product particle size and uniformity also increase. The magnetic properties of products tested by VSM,the results showed that the increased amount of reactant make saturation magnetization increased gradually,coercive force decreased,and the amount of reactant for 1 500 g,the product has the high saturation magnetization Ms = 63.72 emu / g and low coercive force Hc = 15.61 Oe.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2015年第5期25-31,共7页
Materials Science and Technology
基金
甘肃省科技支撑计划项目(1304GKCA027)
