Phase evolution during low-temperature synthesis of MgAl2O4
| Autor: | Yu.P. Kurilo, A. G. Mironova, F.V. Belkin, N.S. Poltavtsev, E. G. Ledovskaya, L.M. Litvinenko, S. V. Gabelkov, R. V. Tarasov, M. P. Starolat, N.F. Andrievskaya |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Brucite Coprecipitation Magnesium General Chemical Engineering Metallurgy Spinel Thermal decomposition Metals and Alloys Analytical chemistry chemistry.chemical_element engineering.material Amorphous solid Inorganic Chemistry chemistry.chemical_compound chemistry Aluminium Materials Chemistry engineering Hydroxide |
| Zdroj: | Inorganic Materials. 43:398-405 |
| ISSN: | 1608-3172 0020-1685 |
| DOI: | 10.1134/s0020168507040139 |
| Popis: | Fine magnesium aluminate spinel powder has been synthesized at low temperatures (300–500°C) via thermal decomposition of hydroxide mixtures prepared by coprecipitation from nitrate solutions. The precipitates consisted of simple and mixed magnesium and aluminum hydroxides in crystalline and amorphous states. The effect of heat treatment (100–800°C) on the phase composition of the precipitates was studied. The synthesized fine spinel powder has three levels of structure: spherical conglomerates (1.2–2 μm), ellipsoidal and irregularly shaped agglomerates of medium (300–700 nm) or small (100–150 nm) size, and primary particles (30–60 nm). The size of coherently scattering domains in the powder is 4 ± 1 nm. |
| Databáze: | OpenAIRE |
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