Formation of TiO2 particles during thermal decomposition of Ti(NO3)4, TiOF2 and TiOSO4
| Autor: | Wojciech Kucharczyk, Oleksii Kapustnik, D. S. Sofronov, Oleksii Demidov, Elena Sofronova, Andrii Doroshenko, Miroslaw Rucki, Anna Shaposhnyk, Pavel V. Mateychenko |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
Anatase Materials science Compaction Sintering chemistry.chemical_element 02 engineering and technology 01 natural sciences Biomaterials chemistry.chemical_compound 0103 physical sciences lcsh:Mining engineering. Metallurgy 010302 applied physics Thermal decomposition Metals and Alloys Precursors 021001 nanoscience & nanotechnology Surfaces Coatings and Films Chemical engineering chemistry Rutile Titanium nitrate Titanium dioxide Ceramics and Composites Nanoparticles Dilatometer 0210 nano-technology Titanium |
| Zdroj: | Journal of Materials Research and Technology, Vol 9, Iss 6, Pp 12201-12212 (2020) |
| ISSN: | 2238-7854 |
| Popis: | In the paper, impact of the precursor decomposition conditions on the morphological and structural characteristics of TiO2 particles was discussed. The novelty and significance of the researches lay in the ability to control morphological features of the synthesized powder particles so that enhanced properties of the sintered ceramics can be obtained. The research program covered thermal decomposition of titanium nitrate, titanium oxyfluoride and titanium oxysulphate at different temperatures, with and without organic additive. Obtained titanium dioxide powder underwent analysis, namely, its phase composition, particle shape and dimensions were measured using X-ray and IR-spectra, as well as scanning electron microscopy. Activity of the obtained particles during sintering process was analyzed using dilatometer and microhardness measurement after sintering. It was found that spherical TiO2 nanoparticles of anatase and rutile phases can be obtained from decomposition of titanium nitrate at 700 °C. Thermal decomposition of other precursors, titanium oxyfluoride and oxysulfate, synthesized only anatase phase with particles of 200 and even 300 nm. Obtained spherical particles were smaller when temperature of decomposition was lower or the activator OP9 was added. However, lower decomposition temperature and additive had negative effect on sintering activity of the obtained particles, decreasing the microhardness of sintered specimens. |
| Databáze: | OpenAIRE |
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