140. synthesis, processing and optical characterization of functionally erbium doped alumina
Name: Matthew Adalberto Duarte
Grad Year: 2019
Synthesis, processing and characterization of nanocrystalline erbia, Er2O3, doped alumina, Al2O3, has been systematically studied. Through a controllable and tunable processing method erbia doped Al2O3 powder was obtained through mechanical alloying with a planetary ball mill. Further processing of erbia doped alumina powders was performed by CAPAD (Current Activated Pressure Assisted Densification) to obtain dense Al2O3 at temperatures of 1200-1300°C. Dense, (>97% theoretical density), bulk Al2O3 was obtained at temperatures as low as 1200°C. From bulk Al2O3, grain sizes as low as 200 nm were obtained. The composition of the Al2O3 was evaluated by characterization method such as X-Ray diffraction. The morphology and size of the powders and bulk samples were analyzed by SEM imaging. Subsequent photoluminescence and UV-Vis characterizations revealed emission and absorption corresponding from the erbia ions efficiently doped in the host lattice.
Industry Application Area(s)
Aerospace, Defense, Security | Materials | Semiconductor