Development of dense Sr-substituted CaAl12O19 (CA6) ceramics synthesized by sol-gel combustion method
| Autor: | Sk S. Hossain, Preeti Jani, P. K. Roy, Japes Bera |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Asian Ceramic Societies, Vol 9, Iss 3, Pp 1007-1014 (2021) |
| Druh dokumentu: | article |
| ISSN: | 2187-0764 21870764 |
| DOI: | 10.1080/21870764.2021.1932083 |
| Popis: | The most alumina-rich compound in the CaO-Al2O3 system is calcium hexaaluminate (CaAl12O19, CA6). CA6 ceramics were synthesized by the sol-gel auto combustion method. CA6 phase formation has been achieved at 1200°C, which is a much lower temperature than the convention process (>1600°C). The influence of Sr2+ substitution on the densification of Ca1-xSrxAl12O19 (x = 0, 0.1, 0.2, and 0.3) ceramics was investigated. The X-ray diffraction analysis and structural refinement indicated the substitution of Sr2+ ions into the lattice of CA6. The elongation of the “c” direction of the CA6 crystal structure was found with Sr2+ ion substitution. Surface morphology analysis showed a crystal growth with Sr2+ substitution in CA6 upto x = 0.2 composition. The 1600°C sintered specimen (with x = 0.2 composition) showed the bulk density and open porosity of 3.39 g/cm3 and 4.92%, respectively. Thus, auto combustion synthesis and Sr2+ substitution into CA6 ceramics are feasible and beneficial for the densification of the ceramics. |
| Databáze: | Directory of Open Access Journals |
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