| The effect of heat treatment temperature on the Phase formation and microstructure of Sr2Co2-xMgx/2Nix/2Fe12O22 (Co2Y) hexaferrite prepared by sol–gel auto-combustion method |
| Paper ID : 2539-UFGNSM13-FULL |
| Authors: |
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yousef alizad farzin *1, Omid Mirzaee2, Ali Ghasemi3 12nd Floor, East Pastor St, Pastor Sq, South Kargar St, Tehran, Iran 2Department of Materials Science and Engineering, University of Semnan , Semnan, Iran 3Department of Materials Engineering, Malek Ashtar University of Technology, Shahin shahr, Isfahan, Iran |
| Abstract: |
| In this study, Ferroxplana type hexagonal ferrite with stoichiometric composition Sr2Co2-xMgx/2Nix/2Fe12O22 (Co2Y) where x = 0.0, 0.15, 0.3, 0.45, 0.6 and 0.75 have been prepared at 1000℃ for 3h by the sol–gel auto-combustion method. X-ray diffraction (XRD) patterns at room temperature have shown that the prepared samples have a single phase. The Fourier transform infrared (FT-IR) spectra show the characteristics absorption ferrite peaks of the heat treatment sample. Scanning electron microscopic (SEM) shows a fine hexagonal platelet-like shape which considers a most suitable shape for microwave absorption. The formation and the microstructure of the Sr2Co2-xMgx/2Nix/2Fe12O22 were studied as a function of heat treatment temperature. (Co2Y) phases was not formed by directly synthesizing it from precursor. Finally, due to its complicated crystalline structure, single Co2Y phase was obtained from some intermediate phases (BaM, cobalt spinel ferrite and etc.) with diffusing cobalt spinel ferrite to BaM at 1000℃. Heat treatment behaviors of synthesized powder has shown that particle size becomes larger with the increase of calcined temperature and the distribution of particle becomes even more homogeneous. |
| Keywords: |
| Nano particle, Y-type hexaferrite (Co2Y), sol–gel auto combustion method, Microstructure, phase formation |
| Status : Paper Accepted (Poster Presentation) |
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