It have been studied porous ceramic Al2O3 obtained via decomposition of aluminum hydroxide. This method allows obtaining ceramics without any impurities on the inner surfaces of porous material. Initial powders were subjected to mechanical treatment in a planetary ball mill for 48 hours and next cold molding samples were sintered in air at 1450-1650 °C for a one hour. It was shown that the porosity of the ceramic increases with increasing content of aluminum hydroxide in the powder mixture and was equal 64% for samples contains 100% Al(OH)3 sintered at 1450 °C. It was found that the compressive strength increases with increasing sintering temperature and concentration of aluminum hydroxide affects on the compaction rate of ceramic samples. The maximum strength of these ceramics was 180 MPa for samples without of hydroxide. It has been estimate that activation energy of the sintering process was 40 ± 5 kJ / mol.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 17 Jul 2018|
|Event||3rd Internatiomal Conference on Rheology and Modeling of Materials, IC-RMM 2017 - Miskolc-Lillafured, Hungary|
Duration: 2 Oct 2017 → 6 Oct 2017
ASJC Scopus subject areas
- Physics and Astronomy(all)