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Porous high-entropy rare-earth phosphate (REPO4, RE = La, Sm, Eu, Ce, Pr and Gd) ceramics with excellent thermal insulation performance via pore structure tailoring.
- Source :
- International Journal of Minerals, Metallurgy & Materials; Jul2024, Vol. 31 Issue 7, p1651-1658, 8p
- Publication Year :
- 2024
-
Abstract
- Thermal insulation materials play an increasingly important role in protecting mechanical parts functioning at high temperatures. In this study, a new porous high-entropy (La<subscript>1/6</subscript>Ce<subscript>1/6</subscript>Pr<subscript>1/6</subscript>Sm<subscript>1/6</subscript>Eu<subscript>1/6</subscript>Gd<subscript>1/6</subscript>)PO<subscript>4</subscript> (HE (6RE<subscript>1/6</subscript>)PO<subscript>4</subscript>) ceramics was prepared by combining the high-entropy method with the pore-forming agent method and the effect of different starch contents (0–60vol%) on this ceramic properties was systematically investigated. The results show that the porous HE (6RE<subscript>1/6</subscript>)PO<subscript>4</subscript> ceramics with 60vol% starch exhibit the lowest thermal conductivity of 0.061 W·m<superscript>−1</superscript>·K<superscript>−1</superscript> at room temperature and good pore structure stability with a linear shrinkage of approximately 1.67%. Moreover, the effect of large regular spherical pores (>10 µm) on its thermal insulation performance was discussed, and an optimal thermal conductivity prediction model was screened. The superior properties of the prepared porous HE (6RE<subscript>1/6</subscript>)PO<subscript>4</subscript> ceramics allow them to be promising insulation materials in the future. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16744799
- Volume :
- 31
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- International Journal of Minerals, Metallurgy & Materials
- Publication Type :
- Academic Journal
- Accession number :
- 177510182
- Full Text :
- https://doi.org/10.1007/s12613-023-2788-1