Highly transparent 0.5 and 1.0 at％Pr-doped Y2O3 ceramics were fabricated by vacuum sintering plus hot isostatic pressing(HIP)treatment.The selection of suitable pre-sintering temperatures and right microstructures before HIP was critical to obtain high density of the final sintered bodies.The well-densified ceramics had pore-free microstructures with an average grain size of about 1 μm.It was also found that the charge states of the Pr ions could be changed through regulating the annealing atmospheres,resulting in different absorption and emission characteristics in the visible wavelength region.Annealing in reducing atmosphere(5％H2/95％Ar)favored the formation of Pr3+,resulting in stronger red emissions,while annealing in oxygen atmosphere led to the rise of lattice constant due to the concentration increase of oxygen interstitials.The H2/Ar-annealed 0.5 at％Pr:Y2O3 ceramics exhibited strong red emission at 600-675 nm,which may be a promising gain material for red solid-state lasers.

Jiangsu Key Laboratory of Advanced Laser Materials and Devices,School of Physics and Electronic Engineering,Jiangsu Normal University,Xuzhou 221116,China;School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore 639798,Singapore;Engineering Research Center of Optical Instrument and System,Ministry of Education and Shanghai Key Lab of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China

[1]Qing LI;Ying WANG;Jun WANG;Jie MA;Meng NI;Hui LIN;Jian ZHANG;Peng LIU;Xiaodong XU;Dingyuan TANG-.High transparency Pr:Y2O3 ceramics:A promising gain medium for red emission solid-state lasers)[J].先进陶瓷（英文版）,2022(06):874-881

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