Fabrication of phosphorescent oxide coatings using the aerosol deposition technique

Ceramic phosphors have been used for non-contact, 2-dimensional temperature sensing in high strain and high temperature environments. The Novel Aerosol Deposition Technique was used to fabricate coatings of Dysprosium doped Yttrium Aluminum Garnet and Mg4F2GeO4:Mn phosphors. Preliminary microstructural/optical characterization has been conducted. Dysprosium doped Yttrium Aluminum Garnet coatings were found to contain both garnet and perovskite phases and had an as-sprayed crystallite size of 25-30 nm. The fast response time and thermal/environmental stability of the doped ceramic phosphors make them excellent materials for temperature measurements on surfaces such as rapidly rotating turbine components. The high density, robust, room temperature deposition of phosphors through the Aerosol Deposition process greatly improves the current state-of-the-art of non-contact temperature sensing