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Preparation of low-shrinkage and high-performance alumina ceramics via incorporation of pre-sintered alumina powder based on Isobam gelcasting.
- Source :
-
Ceramics International . Jun2019, Vol. 45 Issue 9, p11654-11659. 6p. - Publication Year :
- 2019
-
Abstract
- Mechanically robust alumina ceramics with low shrinkage were successfully prepared via gelcasting using Isobam as the gelling agent and pre-sintered alumina powder as the raw material for the first time. The influence of amount of pre-sintered alumina powder and powder's pre-sintering temperature on the viscosity of suspension and mechanical properties of low-shrinkage alumina ceramics were systematically investigated. The results showed that low-shrinkage alumina ceramics with flexural strength of 294.5 ± 33.0 MPa, linear shrinkage of 7.79% and relative density of 91.5% can be obtained with the addition of 60 wt% alumina powder pre-sintered at 1600 °C. This convenient and facile approach is promising to fabricate low-shrinkage alumina ceramics with large sizes, high dimensional accuracy and complex shapes. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GELCASTING
*ALUMINUM oxide
*CERAMICS
*POWDERS
*ALUMINA composites
*SPECIFIC gravity
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 45
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 136350758
- Full Text :
- https://doi.org/10.1016/j.ceramint.2019.03.039