Transmission Optical Properties of Polycrystalline Alumina with Submicron Grains

Translucent alumina ceramics with extremely high in-line optical transmittance to visible light and light mechanical strength were produced by applying HIP process to a sample which was densified at a relatively low temperature after injection molding. Measurements of bulk density and average grain size, X-ray diffraction (XRD) and secondary ion mass spectroscopy (SIMS) analysis, and SEM and TEM observations were conducted