Effect of milling time on mechanical properties of anorthite obtained by thermal transformation of Ca-LTA zeolite
| Autor: | Omerašević Mia, Baščarević Zvezdana, Vujasin Radojka, Devečerski Aleksandar, Bučevac Dušan |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Science of Sintering, Vol 54, Iss 3, Pp 349-358 (2022) |
| Druh dokumentu: | article |
| ISSN: | 0350-820X 1820-7413 |
| DOI: | 10.2298/SOS2203349O |
| Popis: | Anorthite ceramics was fabricated from calcium exchanged Na-LTA zeolite. The powder compacts of Ca-LTA zeolite were sintered at different temperatures ranging between 1100 and 1400°C. It was found that the temperature of 1100°C was sufficiently high to trigger formation of anorthite which stayed stable even at temperature as high as 1400°C. The highest relative density and the lowest open porosity were measured in samples sintered at 1200°C for 3 h. The effect of milling time of Ca-LTA zeolite precursor on density, microstructure and mechanical properties of samples sintered at 1200°C for 3 h was investigated. The particle size refinement appeared to be beneficial in accelerating densification process and improving mechanical properties. The density, compressive strength and hardness of anorthite ceramics obtained from non-milled precursor were measured to be 70.5 %TD, 64 MPa and 1.45 GPa, respectively. On the other side the anorthite ceramics obtained from 24-hour-long milled zeolite precursor had density of 83.9 %TD, compressive strength of 101 MPa and hardness of 3.44 GPa. |
| Databáze: | Directory of Open Access Journals |
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