Effect of mechanochemical treatment on phase composition and properties of Mn-containing cordierite materials
| Autor: | Lyubov Isupova, N. A. Rudina, Irina Molina, Elena Sutormina |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Cordierite 02 engineering and technology Raw material engineering.material 021001 nanoscience & nanotechnology 01 natural sciences Redox law.invention Catalysis Ammonia chemistry.chemical_compound chemistry Chemical engineering law visual_art 0103 physical sciences visual_art.visual_art_medium engineering Calcination Ceramic Texture (crystalline) 0210 nano-technology |
| Zdroj: | Materials Today: Proceedings. 12:167-171 |
| ISSN: | 2214-7853 |
| Popis: | Mn-containing cordierites 2MnO·2Al2O3·5SiO2 were prepared by mechanochemical method from kaolinic clay, alumina and MnO2 after calcination at 1100°C. Phase composition of prepared samples, their texture properties and catalytic activity in ammonia oxidation reaction were found to depend on the activation time. The mechanochemical treatment of raw materials for 90-180 s gave well-crystallized cordierite ceramic characterized by the surface enrichment with Mn cations and high catalytic activity in ammonia oxidation reaction. The increase activation time to 270-360 s led to the possible interaction of MnO2 with Al-containing components during the mechanochemical treatment to form Mn-Al-spinel which is less selective. |
| Databáze: | OpenAIRE |
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