外文题目: Optical absorption and mechanism of vacuum-sintered ZrO2-doped Y2O3 ceramics
作者: Li, Xiaokai; Mao, Xiaojian; Feng, Minghui; Xie, Junxi; Jiang, Benxue; Zhang, Long
刊名: J. Eur. Ceram. Soc.
年: 2016 卷: 36 期: 16 页： 4181--4184
英文关键词:
Transparent Y2O3 ceramics; Optical properties; Transmittance; Defects; Band gap
DOPED YTTRIA CERAMICS; TRANSPARENT CERAMICS; TRANSMITTANCE; ZIRCONIA
英文摘要:
ZrO2 is considered an efficient sintering additive for transparent Y2O3 ceramics. However, the doping of tetravalent Zr4+ ions leads to a dark brown color of the ceramic after vacuum sintering. In this study, the optical properties of vacuum-sintered and air-annealed ceramics were characterized using transmittance spectra and a Commission International de l'Eclairage (CIE) diagram. The corresponding defects are investigated by electron paramagnetic resonance (EPR) spectra. The band gap of the vacuum-sintered samples is 2.72 eV, which is much smaller than that of the annealed sample. The results reveal that the Vo(+) (F+ center) and Zr3+ defects form transition energy levels near the top of the valence band and at the bottom of the conduction band, respectively. The color-related absorption is mainly attributed to the electronic transfer from the Zr3+ level to the conduction band and from the F+ center to the Zr3+ level. (C) 2016 Elsevier Ltd. All rights reserved.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1016/j.jeurceramsoc.2016.05.046


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