Effects of excess NaClO4 on phases, size and magnetic properties of Ni–Zn ferrite powders prepared by combustion synthesis. Issue 8 (September 2015)

• Record Type: Journal Article
• Authors: La, Peiqing; Lei, Wenjuan; Wang, Xia; Wei, Yupeng; Ma, Yingxia
• Is Part Of: Ceramics international. Volume 41:Issue 8(2015)
• Page Start: 9843
• Page End: 9848
• Publication Date: 2015-09
• Subjects: Combustion synthesis -- Ni–Zn ferrites powders -- Phase -- Morphology -- Size -- Morphology; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.04.058
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Ni0.4 Zn0.6 Fe2 O4 powders were prepared by combustion synthesis with different amount of NaClO4 . Phases, particle size and magnetic properties of the powders and annealed powders were systematically investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and vibrating sample magnetism (VSM). The excess content of NaClO4 offered significant advantages with respect to the size, morphology and magnetic properties of the powders. After annealing, sub-micro ferrite spherical powders with spinel phase in a range of 500–800 nm can be obtained. With the increase of the NaClO4 content, the saturation magnetization of the powders shows a maximum value at 68.8 emu/g when w =0.4, whereas the coercivity stayed nearly constant. The maximum saturation of annealed powders by combustion synthesis is much higher than the range reported in the literature.