“…Y 2 O 3 transparent ceramics have been intensively investigated during the past four decades for a wide variety of applications, such as solid-state lasers, scintillators, ceramic phosphors, and transparent windows, owing to their broad range of transparency (0.2-8 μm), high melting point (2430°C), high thermal conductivity, low phonon energy, and easy doping of rare earth activator ions. Previously, ample research efforts have been devoted to the fabrication of highly transparent Y 2 O 3 ceramics by elaborating various aspects of ceramic processing procedures, namely powder synthesis, [1][2][3][4][5][6][7] consolidation, [8][9][10][11][12] and sintering. [13][14][15][16][17] Although progressive improvement in ceramic properties was achieved in the past four decades, and the scientific issues relating to the processing-property relationship have been well addressed by many researchers, there are still a few obstacles hindering the current wider application of this material.…”