【摘要】 目的采用不同的无机原料制备复合型氧化物,考察晶系与磁性的关系。方法选取PVA/α2-K8P2W17Co O61和PVA/KCl、(NH4)6H2W12O40、Co(NO3)2为原料经过高压静电纺丝和高温焙烧方法,制备WO3-Co3O4复合氧化物。结果从扫描电镜照片(SEM)可以看出,杂多酸盐为母体经过高温焙烧后得到了纳米片形貌的复合氧化物,X-射线粉末衍射(XRD)测试结果为六方晶相WO3-Co3O4的复合氧化物,磁学性质为铁磁性耦合;选取普通无机化合物为原料获得纤维形貌的复合氧化物,其晶态为六方和三斜晶相共混的WO3-Co3O4的复合氧化物,表现为反铁磁性耦耦合。结论不同晶系的WO3对Co3O4的磁性有显著的影响。更多还原

【Abstract】 Objective To study the relations between crystal and magnetism during the preparation of composite oxides by different inorganic compounds. Methods The PVA / α2-K8P2W17 Co O61and PVA / KCl,( NH4)6H2W12O40,Co( NO3)2were chosen as raw materials to prepare the composite oxides by using the electrospinning and calcinations technique. Results Scanning electron microscope( SEM) photographs and X-ray diffraction( XRD) indicated that nanoplates and hexagonal system tungsten oxide( WO3)-cobaltosic oxide( Co3O4) composite oxides were obtained. The magnetic properties appeared the ferromagnetic couples. While,chosing inorganic compounds as raw materials,the nanofibers morphology and hexagonal and triclinic system WO3-Co3O4 were obtained. The magnetic properties appeared the antiferromagnetic couples. Conclusion Different crystal WO3 has significant effect on magnetism of Co3O4.更多还原