Abstract Cubic zirconia single crystals stabilized with yttria and doped with Gd2O3 (0.10–5.00 mol%) were prepared by the optical floating zone method, and characterized by a combination of X-ray diffraction (XRD), and Raman, electron paramagnetic resonance (EPR), ultraviolet–visible (UV–Vis), photoluminescence excitation (PLE) and photoluminescence (PL) spectroscopic techniques. XRD and Raman spectroscopy showed that the crystal samples were all in the cubic phase, whereas the ceramic sample consisted of a mixture of monoclinic and cubic phases. The absorption spectrum showed four peaks at 245, 273, 308, and 314 nm in the ultraviolet region, and the optical band gap differed between samples with ≤3.00 mol% and those with >3.00 mol% Gd2O3. The emission spectrum showed a weak peak at 308 nm and a strong peak at 314 nm, which are attributed to the 6P5/2 → 8S7/2 and 6P7/2 → 8S7/2 transitions of Gd3+, respectively. The intensities of the peaks in the excitation and emission spectra increased with Gd3+ concentration, reached a maximum at 2.00 mol%, then decreased with higher concentrations. This quenching is considered to be the result of the electric dipole-dipole interactions, and this interpretation is supported by the Gd3+ EPR spectra, which showed progressive broadening with increasing Gd3+ concentration throughout the concentration range investigated.

中文翻译：

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掺钆立方氧化钇稳定氧化锆单晶的光学性质

摘要 采用光学浮区法制备了氧化钇稳定并掺杂 Gd2O3 (0.10–5.00 mol%) 的立方氧化锆单晶，并结合 X 射线衍射 (XRD)、拉曼、电子顺磁共振 (EPR) 进行表征。 )、紫外-可见 (UV-Vis)、光致发光激发 (PLE) 和光致发光 (PL) 光谱技术。XRD 和拉曼光谱表明晶体样品均处于立方相，而陶瓷样品由单斜相和立方相的混合物组成。吸收光谱在紫外区的 245、273、308 和 314 nm 处有四个峰，且光学带隙在≤3.00 mol% 和>3.00 mol% Gd2O3 的样品之间存在差异。发射光谱在 308 nm 处有弱峰，在 314 nm 处有强峰，这分别归因于 Gd3+ 的 6P5/2 → 8S7/2 和 6P7/2 → 8S7/2 跃迁。激发和发射光谱中的峰强度随着 Gd3+ 浓度的增加而增加，在 2.00 mol% 时达到最大值，然后随着浓度的升高而降低。这种猝灭被认为是电偶极-偶极相互作用的结果，并且这种解释得到了 Gd3+ EPR 光谱的支持，在整个研究的浓度范围内，随着 Gd3+ 浓度的增加，其逐渐变宽。