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- W2003645900 abstract "Hexagonal M type SrFe12O19 (SrM) ferrites were synthesized by the hydrothermal method, and the effects of molar ratio of OH−/NO3− (RO/N), the atomic ratio of Fe/Sr (RF/S) and sintering on the phase composition and magnetic properties of as-synthesized specimens are studied. It is found that the RO/N and RF/S in starting materials affect the phase composition and magnetic properties greatly. Fe2O3 is found as impurity in some specimens, while in all as-synthesized specimens, SrCO3 forms inevitably during the synthesis process. After sintering at 1100 °C, the perovskite type SrFeO3−x ferrite forms as the product of SrCO3 and Fe2O3 at high temperature, and the specimens exhibit the Perminvar magnetic hysteresis loops which show two-phase magnetic behaviors. However, when sintered at 1200 °C, SrFeO3−x further reacts with Fe2O3 to produce SrFe12O19, and the specimens with RF/S=8, 9 and 10 exhibit the single-phase hexagonal structure and magnetic behavior. It is also found that the saturation magnetization and coercivity are both enhanced after sintering at high temperatures due to the elimination of impurities." @default.
- W2003645900 created "2016-06-24" @default.
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- W2003645900 date "2013-04-01" @default.
- W2003645900 modified "2023-10-16" @default.
- W2003645900 title "Hexagonal SrFe12O19 ferrites: Hydrothermal synthesis and their sintering properties" @default.
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- W2003645900 doi "https://doi.org/10.1016/j.jmmm.2012.12.035" @default.
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