Scientific Results

Fabrication and laser performances of Yb:Sc2O3 transparent ceramics from different combination of vacuum sintering and hot isostatic pressing conditions

Year: 2020

Authors: Toci G., Hostasa J., Patrizi B., Biasini V., Pirri A., Piancastelli A., Vannini M.

Autors Affiliation: CNR INO, Via Madonna Piano 10 C, I-50019 Sesto Fiorentino, FI, Italy; CNR ISTEC, Inst Sci & Technol Ceram, Via Granarolo 64, I-48018 Faenza, RA, Italy; CNR IFAC Ist Fis Applicata Carrara, Via Madonna Piano 10C, I-50019 Sesto Fiorentino, FI, Italy

Abstract: In this paper we report on the preparation and laser performance of transparent 3aL% Yb:Sc2O3 ceramics by reactive sintering of commercially available powders under vacuum followed by hot isostatic pressing (HIP). Combinations of different vacuum sintering temperatures (1650 degrees C and 1750 degrees C) and different HIP treatments (1700 degrees C and 1800 degrees C at 200 MPa) were tested in order to understand how these steps influence the microstructure and thus the optical and lasing properties of the ceramic samples. All the samples showed a good optical quality. The microstructure analysis and the laser tests showed that the vacuum pre-sintering temperature is the key factor determining the quality of the samples and the laser performances. The best values of slope efficiency i.e. eta(L) = 50 % and output power i.e. P-out = 6.62 W were obtained for the sample pre-sintered under vacuum at 1650 degrees C and hot isostatically pressed at 1800 degrees C.


Volume: 40 (3)      Pages from: 881  to: 886

KeyWords: Hot isostatic pressing; Laser ceramics; Yb-doped sesquioxides laser ceramics
DOI: 10.1016/j.jeurceramsoc.2019.10.059

Citations: 2
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