Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 8, Pages 6312-6321Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.02.038
Keywords
Spodumene; First-principles calculation; Electronic structure; Optical property
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Funding
- Reserve Talents Project of Yunnan Province [2015HB019]
- Scientific Research Fund of Department of Education of Yunnan Province [2015Z038]
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To further the applications of spodumene in ceramic materials, we performed first-principles density functional theory calculations using a quasi-harmonic approximation to investigate the electronic structures and optical, phononic, and thermodynamic properties of monoclinic types of a-spodumene with C2 and P2(1) structures. The electronic structures of C2- and P2(1)-spodumene including band structure and density of states, were observed to be similar. These spodumene can be treated as wide-direct-band-gap insulators with band-gap widths of 5.537 eV for C2 -spodumene and 6.335 eV for P2(1)-spodumene. The optical properties of C2- and P2(1)-spodumene indicated that both C2- and P2(1)-spodumene were found to be optically anisotropic and they can be used for UV shielding in optical devices. Additionally, we investigated the phononic properties of these spodumene to explore their thermodynamic characteristics, and found that both types are dynamically stable.
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