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Microstructure and performances of Gd2O3-added corundum–mullite ceramic composites for concentrated solar power applications.
- Source :
-
Ceramics International . Jun2021, Vol. 47 Issue 12, p17177-17185. 9p. - Publication Year :
- 2021
-
Abstract
- Gd 2 O 3 was added to increase the properties of corundum–mullite ceramic composites by enhancing the microstructural densification using coal-series kaolin and α-Al 2 O 3. The effect of Gd 2 O 3 addition on the microstructure and properties of ceramic composites was explored. The results showed that the formation of Gd 2 O 3 –Al 2 O 3 –SiO 2 liquid phase could improve the bending strength, hardness, and acid resistance, since such liquid phase promoted microstructural densification via a reaction between Gd 2 O 3 and Al 2 O 3 –SiO 2 binary system in this Al 2 O 3 -rich and SiO 2 -poor system. The precipitation of mullite and gadolinium disilicate during thermal shocks resulted in enhanced bending strength. In particular, sample AG5 (80 wt% Al 2 O 3 , 20 wt% coal-series kaolin, and 5 wt% additional Gd 2 O 3) sintered at 1550 °C was considered as candidate for heat transmission pipeline for the optimum comprehensive performance. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SOLAR energy
*MICROSTRUCTURE
*THERMAL shock
*HEAT transfer
*KAOLIN
*CERAMICS
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 47
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 150185543
- Full Text :
- https://doi.org/10.1016/j.ceramint.2021.03.028