Ceramics with a hierarchical porous structure based on aluminum oxide

R. V. Levkov, N. V. Pigaleva, M. V. Korobenkov, S. N. Kulkov

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Article number012027
JournalJournal of Physics: Conference Series
Volume1045
Issue number1
DOIs
Publication statusPublished - 17 Jul 2018
Event3rd Internatiomal Conference on Rheology and Modeling of Materials, IC-RMM 2017 - Miskolc-Lillafured, Hungary
Duration: 2 Oct 20176 Oct 2017

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aluminum oxides
hydroxides
ceramics
aluminum
sintering
compressive strength
porous materials
balls
activation energy
porosity
decomposition
impurities
air
estimates
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ceramics with a hierarchical porous structure based on aluminum oxide. / Levkov, R. V.; Pigaleva, N. V.; Korobenkov, M. V.; Kulkov, S. N.

In: Journal of Physics: Conference Series, Vol. 1045, No. 1, 012027, 17.07.2018.

Research output: Contribution to journalConference article

Levkov, R. V. ; Pigaleva, N. V. ; Korobenkov, M. V. ; Kulkov, S. N. / Ceramics with a hierarchical porous structure based on aluminum oxide. In: Journal of Physics: Conference Series. 2018 ; Vol. 1045, No. 1.
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