Highly transparent Yb:Y2O3 ceramics obtained by solid-state reaction and combined sintering procedures |
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| Authors: | G. Stanciu L. Gheorghe F. Voicu S. Hau C. Gheorghe G. Croitoru M. Enculescu R.P. Yavetskiy |
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| Affiliation: | 1. National Institute for Laser, Plasma and Radiation Physics, Laboratory of Solid-State Quantum Electronics, Magurele 077125, Ilfov, Romania;2. National Institute of Materials Physics, Magurele 077125, Ilfov, Romania;3. Institute for Single Crystals of NAS of Ukraine, 60 Nauky Ave., Kharkiv 61072, Ukraine |
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| Abstract: | (Y0.87-xLa0.1Zr0.03Ybx)2O3 (x?=?0.02, 0.04, 0.05) transparent ceramics were obtained by solid-state reaction and combined sintering procedures with La2O3 and ZrO2 as sintering additives. A method based on two-step intermediate sintering in air followed by vacuum sintering was applied in order to control the densification and grain growth of the samples during the final sintering process. The results indicate that La2O3 and ZrO2 co-additives can improve the microstructure and optical properties of Yb:Y2O3 ceramics at relatively low sintering temperature. On the other hand, the addition of Zr4+ ions leads to the formation of dispersed scattering volumes in the ceramic bodies. Transmittance of 78.8% was measured for the 2.0?at% Yb:Y2O3 ceramic sample at the wavelength of 1100?nm. The spectroscopic properties of Yb:Y2O3 ceramics were investigated at room temperature. The obtained results show that the absorption cross-section at 978?nm is in the range of 2.08?×?10–20 to 2.36?×?10–20 cm2, whereas the emission cross-section at 1032?nm is ~1.0?×?10–20 cm2. |
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| Keywords: | Sintering additives Optical transmittance Spectroscopic properties |
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