Back to Search Start Over

Microstructure and performances of Gd2O3-added corundum–mullite ceramic composites for concentrated solar power applications.

Authors :
Wu, Jianfeng
Ding, Chunjiang
Xu, Xiaohong
Zhou, Shixiang
Zhou, Yang
Zhang, Qiangkun
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]

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