Title
High-temperature thermographic phosphor mixture YAP/YAG:Dy3+ and its photoluminescence properties
Author
Liudmyla M. Chepyga, Andres Osvet, Christoph J. Brabec, Miroslaw Batentschuk
Year
2017
Journal
Journal of Luminescence
Abstract
In this work we report on the investigation of high-temperature thermographic phosphors Dy3+-doped yttrium aluminum garnet and the mixture of yttrium aluminum perovskite / yttrium aluminum garnet (YAP/YAG). The phosphors were synthesized by conventional high temperature solid-state method using lithium fluoride (LiF) as a flux. The latter serves also as a source of co-doping Li+ and F- ions affecting the luminescent properties. The photoluminescence intensity of YAP/YAG:Dy (75/25%) mixture was doubled at room temperature compared to YAG:Dy and the intensity ratio of the lines in the regions 450–460 and 480–500 nm was increased from 0.45 to 0.63 at 1293 K, favoring temperature measurements. Therefore, the mixture of YAlO3/Y3Al5O12:Dy is promising material for high temperature phosphor thermometry.
Instrument
FP-8500
Keywords
Photoluminescence, Fluorescence, Chemical stability, Materials