Articolo in rivista, 2023, ENG, 10.1111/ijac.14441

Microstructure and properties characterization of Yb:Lu2O3 transparent ceramics from co-precipitated nano-powders

Liu, Ziyu; Feng, Yagang; Chen, Haohong; Toci, Guido; Pirri, Angela; Patrizi, Barbara; Hreniak, Dariusz; Vannini, Matteo; Li, Jiang

Chinese Acad Sci; Univ Chinese Acad Sci; Changsha Univ Sci & Technol; Henan Univ Technol; CNR; CNR; Polish Acad Sci; Chinese Acad Sci

5at.% Yb:Lu2O3 transparent ceramics were fabricated successfully by vacuum sintering along with hot isostatic pressing posttreatment from the nanopowders. The influences of calcination temperature on morphology and microstructures of powders and ceramics were studied systematically. The optimal ceramic sample from the nanopowder calcined at 1050 degrees C shows uniform and dense microstructure with the in-line transmittance of 81.5% at 1100 nm. The results of the thermal measurements, that is, thermal conductivity and specific heat, were related to the changes occurring in the microstructure of the ceramics studied. It was shown on this basis that appropriate control of the technological process of sintering ceramics makes it possible to obtain laser ceramics with very good thermal properties as well as maintaining their high optical quality. Concerning the laser performance, the highest-optical quality 5at.% Yb:Lu2O3 sample was pumped in quasi-continuous wave conditions measuring a maximum output power of 2.59 W with a corresponding slope efficiency of 32.4%.

International journal of applied ceramic technology

Keywords

laser performance, microstructures, optical properties, thermal properties, Yb, Lu2O3 transparent ceramics

CNR authors

Vannini Matteo, Toci Guido, Pirri Angela, Patrizi Barbara

CNR institutes