单分散BaFe_(12-x)Cu_xO_(19)纳米颗粒磁性能及穆斯堡尔谱分析  

Magnetic Properties and Mssbauer Spectrum Analysis of Monodisperse BaFe_(12-x)Cu_xO_(19) Nanoparticle

作　　者：张鹏[1] 张小平[1] 王军[1] 

机构地区：[1]宁波大学理学院,宁波315211

出　　处：《人工晶体学报》2017年第11期2197-2202,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(11474174)

摘　　要：采用水热法制备BaFe_(12-x)Cu_xO_(19)(x=0、0.2、0.4、0.6、0.8)钡铁氧体,探讨Cu~)2+_掺杂量对纳米BaFe_(12)O_(19)微观结构以及磁性能的影响。穆斯堡尔光谱分析结果显示,Cu^(2+)可以定量可控的掺入到BaFe_(12)O_(19)的晶格中。利用X射线衍射仪(XRD)和扫描电镜(SEM)对不同掺杂量的样品进行表征,结果表明,800℃热处理可以明显提高BaFe_(12)O_(19)纳米颗粒的结晶性,并随着Cu^(2+)掺入量的增多BaFe_(12)O_(19)的晶粒尺寸逐渐增大。从磁测量分析结果可以得知,适当掺入Cu^(2+)可以降低BaFe_(12)O_(19)的矫顽力与饱和磁化强度,使得BaFe_(12)O_(19)纳米颗粒开始从硬磁性能向软磁性能转变。BaFe12_xCux019 （ = 0, 0.2, 0.4, 0.6, 0. 8） barium ferrite was prepared by hydrothermal019. The samples with different doping amount were characterized by X-ray diffraction （XRD） and scanning electron microscopy （ SEM） , and the results show that the heat treatment of 800 Tl can significantly improve BaFe12019 crystalline nanoparticles. And the grain size of BaFe12019 increases with theso that BaFe12019 nanoparticles start to change from hard magnetism to soft and magnetic properties.

关 键 词：BAFE12O19 水热法 穆斯堡尔谱 超交换相互作用 

分 类 号：TM277[一般工业技术—材料科学与工程]