Study of iron oxides obtained by decomposition of an organic precursor
| Autor: | S Garcı́a-Garcı́a, J Matutes-Aquino, P Garcı́a-Casillas, O Ayala-Valenzuela |
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| Rok vydání: | 1999 |
| Předmět: |
Materials science
Mechanical Engineering Inorganic chemistry Thermal decomposition Iron oxide Maghemite engineering.material Hematite Condensed Matter Physics Decomposition chemistry.chemical_compound chemistry Mechanics of Materials visual_art Differential thermal analysis engineering visual_art.visual_art_medium General Materials Science Particle size Superparamagnetism |
| Zdroj: | Materials Letters. 38:173-177 |
| ISSN: | 0167-577X |
| Popis: | Iron oxide powders were obtained by the isothermal decomposition of ferric citrate in an oxygen atmosphere at different temperatures. Throughout the experiments, the product of decomposition was a mixture of maghemite (γ-Fe 2 O 3 ) and hematite (α-Fe 2 O 3 ) with different relative proportions and particle size distributions. After TGA and DTA measurements, a decomposition temperature of 300°C was chosen, and a maximum specific saturation magnetization of about 40 emu/g was obtained. Most of the product particles were less than 1 μm in size, including a superparamagnetic fraction, as evidenced by Mossbauer spectroscopy. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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