| Structural and magnetic properties of W-type hexagonal ferrite nanoparticles prepared by Co-precipitation method |
| Paper ID : 2398-UFGNSM13-FULL (R2) |
| Authors: |
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Marzieh Mohseni *1, Ali Ghasemi2, Gholam reza gordani2 1No. 22, Negar dead-end, Ostrad-sharif memar alley, Ahmadabad St., Isfahan, Iran. 2Department of Materials Engineering, Malek Ashtar University of Technology, Shahin shahr, Isfahan, Iran |
| Abstract: |
| W-type Sr-hexaferrite nanoparticles with chemical composition of SrZn2Fe16O27 were synthesized by a co-precipitation method. The considering time and temperature for synthesizing of samples were varied from 1 to 3 h and 900 to 1100 ℃, respectively. The structural and magnetic properties of samples which synthesized in different conditions were investigated by using X-ray diffraction (XRD), Field emission scanning electron microscope (FE-SEM) and vibrating sample magnetometer (VSM). XRD analysis indicated that at the lowest temperature (900 ℃) and the lowest time (1 h) of the considered annealing combinations, amorphous phases detected, whereas the higher temperature as well as higher times resulted in crystalline phases of W-type Sr-hexaferrite. Moreover, the crystallite size of the synthesized nanoparticles was increased with increasing in calcination temperature and lies in the range of 30-42 nm. FE-SEM micrographs showed that with increasing the calcination time and temperature the particles size increased from 56 to 575 nm. It was found from VSM results that the saturation of magnetization increased from 43.26 to 58.95 emu/g while coercive force were decreased from 3677.99 to 2929.76 Oe, respectively. In overall, the W-type Sr-hexaferrite nanoparticles synthesized at 1000 ℃ for 1 h is suitable material for electromagnetic interference attenuation applications with best magnetic properties. |
| Keywords: |
| W-type hexaferrite, nanoparticles, co-precipitation, magnetic properties |
| Status : Paper Accepted (Poster Presentation) |
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