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Fabrication and laser performances of Yb:Sc2O3 transparent ceramics from different combination of vacuum sintering and hot isostatic pressing conditions
Affiliation:1. Istituto Nazionale di Ottica, INO, Consiglio Nazionale delle Ricerche, CNR, Via Madonna del Piano 10 C, 50019, Sesto Fiorentino (FI), Italy;2. CNR ISTEC National Research Council, Institute of Science and Technology for Ceramics, via Granarolo 64, 48018, Faenza (RA), Italy;3. Istituto di Fisica Applicata “Carrara”, IFAC, Consiglio Nazionale delle Ricerche, CNR, Via Madonna del Piano 10C, 50019, Sesto Fiorentino (FI), Italy;1. G.G. Devyatykh Institute of Chemistry of High-Purity Substances of the Russian Academy of Sciences, Nizhny Novgorod, Russia;2. Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russia;3. Institute of Electrophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia;1. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, China;2. School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore;3. School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore;1. Jiangsu Key Laboratories of Advanced Laser Materials and Devices, School of Physics and Electronics Engineering, Jiangsu Normal University, Xuzhou, 221116 China;2. Jiangsu Collaborative Innovation Center of Advanced Laser Technology and Emerging Industry, Jiangsu Normal University, Xuzhou, 221116 China;1. CNR ISTEC, Institute of Science and Technology for Ceramics, Via Granarolo 64, 48018, Faenza, Italy;2. CNR INO, National Institute of Optics, Via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
Abstract:In this paper we report on the preparation and laser performance of transparent 3at.% 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 °C and 1750 °C) and different HIP treatments (1700 °C and 1800 °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. ηL = 50 % and output power i.e. Pout = 6.62 W were obtained for the sample pre-sintered under vacuum at 1650 °C and hot isostatically pressed at 1800 °C.
Keywords:Hot isostatic pressing  Laser ceramics  Yb-doped sesquioxides laser ceramics
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