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Entropy–enthalpy interactions and optical properties of non-equiatomic multicomponent rare-earth oxides.
- Source :
- Journal of Materials Science: Materials in Electronics; Jun2022, Vol. 33 Issue 17, p13977-13987, 11p
- Publication Year :
- 2022
-
Abstract
- The multicomponent oxides (Ce<subscript>1/2</subscript>Zr<subscript>1/2</subscript>)<subscript>1−x</subscript>(La<subscript>1/3</subscript>Y<subscript>1/3</subscript>Gd<subscript>1/3</subscript>)<subscript>x</subscript>O<subscript>2−σ</subscript> with different elements ratio (x = 0.3, 0.45, 0.6, 0.75, 0.9; abbreviated as CZLYGx) were prepared by co-precipitation method. XRD patterns shows that the compostion with x = 0.9 exhibits mixing crystal structure of Fm-3 m and Ia-3 phases, while the others possess single-phase fluorite structures. Transmission electron microscopy shows that nanoparticles of CZLYG90 with a particle size of about 34 nm were synthesized. The competitive relationship between entropy and enthalpy are analyzed, low mixing enthalpy and high configurational entropy benefit the stabilization of single-phase multicomponent oxide. The direct band gap value of CZLYGx increases from 3.51 eV to 3.99 eV with x increasing, which exhibits promising candidate as an optical material. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09574522
- Volume :
- 33
- Issue :
- 17
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science: Materials in Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 157506759
- Full Text :
- https://doi.org/10.1007/s10854-022-08328-0