| Abstract Scope |
Y2O3-MgO polycrystalline ceramics have been interested for infrared transparent ceramics due to their superior intrinsic optical and thermal characteristics. When the Y2O3-based nanocomposites are applied for infrared transparent ceramics, the large difference in refractive index between two phases brings about excessive grain boundary scattering, through which near-infrared transmittance decreases. Herein, pressure-assisted two-step consolidation of infrared transparent ceramics are investigated to achieve full density while retaining domain size. Transparency in short-wavelength region can be improved. To obtain broad mid-infrared transparency, the influence of additive is also studied. Furthermore, other non-cubic transparent ceramics are fabricated for applying NIR laser ceramics. Based on these results, we have demonstrated that the non-cubic transparent polycrystalline ceramics can be a promising candidate for use in broad infrared optical materials. |