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- W3205295912 abstract "Zinc oxide optical ceramics containing 0–2 wt% ytterbium are prepared by uniaxial hot pressing of commercial oxides at 1150 and 1180 °C. The ceramics have the main crystalline phase of hexagonal wurtzite-type ZnO. Ytterbium ions do not enter the ZnO crystals but form a cubic sesquioxide phase of Yb2O3 located at the ZnO grain boundaries. Yb acts as an inhibitor for the ZnO grain growth. The ceramics exhibit transmittance up to 60 % in the visible. Their transmission in the infrared is determined by the free charge carrier absorption. The Yb3+ ions are found in C2 and C3i sites in Yb2O3 crystals. Under X-ray excitation, the ceramics exhibit intense luminescence bands in the blue (near-band-edge emission) and green (defect emission) whose positions, intensities and decay times depend on the Yb content. Yb2O3 causes a redistribution of luminescence intensity in favor of the near-band-edge emission and fastens the emission decay." @default.
- W3205295912 created "2021-10-25" @default.
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- W3205295912 date "2022-02-01" @default.
- W3205295912 modified "2023-10-05" @default.
- W3205295912 title "ZnO – Yb2O3 composite optical ceramics: Synthesis, structure and spectral-luminescent properties" @default.
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- W3205295912 doi "https://doi.org/10.1016/j.jeurceramsoc.2021.10.031" @default.
- W3205295912 hasPublicationYear "2022" @default.
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