Synthesis and structural study of a self-organized MnTiO3–TiO2 eutectic
| Autor: | Ryszard Diduszko, Katarzyna Kolodziejak, Jaroslaw Sar, Dorota A. Pawlak, Krzysztof Rozniatowski, Marcin Gajc |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Mechanical Engineering Composite number Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Titanate 0104 chemical sciences Tetragonal crystal system chemistry.chemical_compound Crystallography chemistry Chemical engineering Mechanics of Materials Phase (matter) Titanium dioxide Materials Chemistry 0210 nano-technology Powder diffraction Eutectic system |
| Zdroj: | Journal of Alloys and Compounds. 659:152-158 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2015.11.010 |
| Popis: | A microstructured manganese titanate – titanium dioxide, MnTiO 3 –TiO 2 , hybrid eutectic has been grown by the micro-pulling-down method from a TiO 2 57 mol.% – MnO 43 mol.% composition. X-ray powder diffraction verifies that two phases have been formed: rhombohedral MnTiO 3 and tetragonal TiO 2 . The TiO 2 phase forms a three-dimensional network of micron-scale oval precipitates interconnected with c.a. 0.5 μm in thickness lamellas and the MnTiO 3 is the matrix phase. The two TiO 2 precipitate types grow in different crystallographic orientations, which results in this complex geometry made of faceted and non-faceted inclusions. The lamellas grow in the [010] orientation in which a 2-fold axis is present, while the oval precipitates grow in the [001] orientation in which the 4-fold screw axis is present. A qualitative and quantitative analysis of the eutectic microstructure is presented. The MnTiO 3 –TiO 2 composite is interesting due to its potential application in photoelectrochemistry. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect