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- Title
Entropy–enthalpy interactions and optical properties of non-equiatomic multicomponent rare-earth oxides.
- Authors
Yang, Jian; Liu, Qing-qing; Wu, Fei; Jiang, Tong-zhou; Ren, Yu-rong; Chen, Zhi-hui
- Abstract
The multicomponent oxides (Ce1/2Zr1/2)1−x(La1/3Y1/3Gd1/3)xO2−σ 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.
- Subjects
CERIUM oxides; OPTICAL properties; OPTICAL materials; TRANSMISSION electron microscopy; BAND gaps; OXIDES; ENTHALPY; RARE earth oxides
- Publication
Journal of Materials Science: Materials in Electronics, 2022, Vol 33, Issue 17, p13977
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-022-08328-0