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Thermophysical properties of Yb(TaxNb1−x)O4 ceramics with different crystal structures.
- Source :
-
Ceramics International . Dec2020:Part A, Vol. 46 Issue 18, p28451-28458. 8p. - Publication Year :
- 2020
-
Abstract
- Monoclinic (m) and monoclinic-prime (m′) phases of Yb(Ta x Nb 1− x)O 4 ceramics were synthesized successfully, and the relationships between the crystal structures and the thermophysical properties were investigated by various methods. A ferroelastic domain existed in the m-Yb(Ta x Nb 1- x)O 4 ceramics, as observed by a scanning electron microscopy, which suggests that a ferroelastic phase transition occurred. The minimum thermal conductivity of the Yb(Ta x Nb 1− x)O 4 ceramics was 1.49 W m−1·K−1, whereas the maximum thermal expansion coefficient (TEC) was 10.6 × 10−6 K−1 (1200 °C). The m-phase had a lower Young's modulus (110–132 GPa) than the m′-phase (133–140 GPa). In view of the low thermal conductivity and high TEC, Yb(Ta x Nb 1− x)O 4 ceramics have the potential to be high-temperature structural ceramics. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 46
- Issue :
- 18
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 146656699
- Full Text :
- https://doi.org/10.1016/j.ceramint.2020.08.002