Journal
CERAMICS INTERNATIONAL
Volume 38, Issue 3, Pages 2011-2019Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2011.10.036
Keywords
Thermal shock resistance; Al2O3; TiO2; ZrO2; Refractories
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Funding
- German Scientific Foundation (DFG) [SPP 1418]
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The present contribution investigates the influence of micro-metre- as well as nano-metre-additions of zirconia (ZrO2), titania (TiO2), silica (SiO2) and magnesia (MgO) into alumina-rich fine grained ceramic materials for refractory applications. Slip casted samples in the system alumina-zirconia-titania (AZT), alumina zirconia titania silica (AZTS) and alumina-zirconia-titania-magnesia (AZTM) were sintered and the physical as well as mechanical properties were investigated as fired and after thermal shock treatments. The generation of a micro-crack network after sintering due to the formation of phases with different thermal expansion coefficients and the formation and decomposition of aluminium titanate (Al5TiO5) before and after thermal shock exposure leads to higher strengths after thermal shock attack. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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