Glass–Ceramic Composites with Strontium Hexaferrite Ultrafine Particles in the SrO–Fe2O3–B2O3–SiO2 System |
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| Authors: | Dmitry D Zaitsev Ekaterina A Gravchikova Pavel E Kazin Yury D Tretyakov Martin Jansen |
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| Affiliation: | Department of Materials Science, Moscow State University, 119992 Moscow, Russian Federation; Chemistry Department, Moscow State University, 119992 Moscow, Russian Federation; Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany |
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| Abstract: | Glass samples with nominal compositions SrFe12O19+(12− n )SrB2O4+nSrSiO3, n =3, 6, 9 were prepared by rapid quenching of the melt. Processes of glass devitrification were studied. The samples were annealed at temperatures of 600–900°C, and the resulting glass–ceramics was characterized by XRD, SEM, EDX, and magnetic measurements. SrFe12O19 crystallizes above 700°C and forms nano- and submicron platelet particles with the aspect ratio depending on the thermal treatment conditions. The glass–ceramic samples annealed at 900°C show coercive force values in the range of 422–455 kA/m. |
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