Phase transformations of siderite ore by the thermomagnetic analysis data
| Autor: | N.O. Dudchenko, A.B. Brik, V.P. Ponomar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
010504 meteorology & atmospheric sciences Thermal decomposition Thermodynamics 02 engineering and technology Thermomagnetic convection engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnesioferrite Magnetization Siderite chemistry.chemical_compound chemistry Phase (matter) engineering Curie temperature 0210 nano-technology Ankerite 0105 earth and related environmental sciences |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 423:373-378 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2016.09.124 |
| Popis: | Thermal decomposition of Bakal siderite ore (that consists of magnesium siderite and ankerite traces) was investigated by thermomagnetic analysis. Thermomagnetic analysis was carried-out using laboratory-built facility that allows automatic registration of sample magnetization with the temperature (heating/cooling rate was 65°/min, maximum temperature 650 °C) at low- and high-oxygen content. Curie temperature gradually decreases with each next cycles of heating/cooling at low-oxygen content. Curie temperature decrease after 2nd cycle of heating/cooling at high-oxygen content and do not change with next cycles. Final Curie temperature for both modes was ~320 °C. Saturation magnetization of obtained samples increases up to 20 Am2/kg. The final product of phase transformation at both modes was magnesioferrite. It was shown that intermediate phase of thermal decomposition of Bakal siderite ore was magnesiowustite. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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