140. synthesis, processing and optical characterization of functionally erbium doped alumina

Department: Mechanical & Aerospace Engineering
Faculty Advisor(s): Javier E. Garay

Primary Student
Name: Matthew Adalberto Duarte
Email: m8duarte@ucsd.edu
Phone: 310-972-8564
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 1200-1300C. Dense, (>97% theoretical density), bulk Al2O3 was obtained at temperatures as low as 1200C. 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

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