A comparative study of in-situ mechanochemically synthesized Mn0.5Zn0.5Fe2O4 ferrite nanoparticles in the MnO/ZnO/Fe2O3 and MnO2/Zn/Fe2O3 systems. Issue 6 (July 2015)

• Record Type: Journal Article
• Authors: Hajalilou, Abdollah; Hashim, Mansor; Taghi Masoudi, Mohamad
• Is Part Of: Ceramics international. Volume 41:Issue 6(2015)
• Page Start: 8070
• Page End: 8079
• Publication Date: 2015-07
• Subjects: A. Powders: solid state reaction -- C. Magnetic properties -- D. Ferrites -- E. Soft magnets; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.03.005
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this work, the possibility of using the mechanochemical route to synthesize Mn0.5 Zn0.5 Fe2 O4 single phase in the ZnO/MnO/Fe2 O3 (system 1) and Zn/MnO2 /Fe2 O3 (system 2) was investigated. The effects of milling time, heat treatment, and reaction mechanism were also studied. The XRD results indicated that the Mn0.5 Zn0.5 Fe2 O4 ferrite was formed after 20 h and 5 h milling, respectively in the systems 1 and 2, with some residual Fe2 O3 . By performing a Self-propagating high-temperature synthesis for both the systems, it was determined that a mechanism of the ferrite formation could occur by solid-state diffusion mode (gradual mode) for system 1 and by self-propagating mode (explosive/combustion mode) for system 2. By increasing the milling time, the average crystallite size decreased and lattice strain increased for both the systems. Interestingly, the crystallite sizes were smaller in the system 2. TEM micrographs indicated the average particle sizes of 46 nm and 33 nm, respectively for system 1 and 2, after 40 h milling which grew to 70 and 52 nm after annealing at 600 °C for 2 h. VSM results suggested a saturation magnetization value of 40 h-milled samples to be 4 and 7 emu/g, respectively for systems 1 and 2, which increased to 22, 37 emu/g after annealing.