Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1461069 | Ceramics International | 2014 | 10 Pages |
Abstract
Co1âxMgxFe2O4 precursor was synthesized by solid-state reaction at low temperatures using MgSO4·7H2O, CoSO4·7H2O, FeSO4·7H2O, and Na2C2O4 as raw materials. Co1âxMgxFe2O4 was obtained by calcining the precursor over 500 °C in air. The precursor and its calcined products were characterized by thermogravimetry and differential scanning calorimetry, X-ray powder diffraction, scanning electron microscopy, and vibrating sample magnetometry. A high-crystallized Co1âxMgxFe2O4 with a cubic structure was obtained when the precursor was calcined at 500 °C in air for 2 h. The specific saturation magnetizations of Co1âxMgxFe2O4 depend on the calcination temperature and composition. The thermal transformation of the precursor from ambient temperature to 850 °C in air presented two steps. The values of the activation energies associated with the thermal transformation of CoC2O4-2FeC2O4·5.77H2O were determined based on the KAS equation.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Qin Liqin, Gao Minlin, Wu Wenwei, Ou Shiqian, Wang Kaituo, Liu Bang, Wu Xuehang,