Abstract
In this study, we investigated temperature and oxygen concentration effects on the phosphorescence of thermographic phosphors which are expected to be applied to two-color phosphor thermometry. For YAG:Pr and BAM:Eu phosphors, two-color ratios showed strong variations with temperature. For YAG:Eu, YAG:Tb, YAG:Ce and YAG:Ce,Tb phosphors, two-color ratios showed so small variations with temperature that those temperature resolutions in the two-color method were quite poor. Furthermore, phosphorescences of YAG:Pr, YAG:Eu and YAG:Ce exhibited insensitivity to oxygen concentration, while those of BAM:Eu, YAG:Tb, and YAG:Ce,Tb exhibited oxygen quenching effect with elevating temperature. However, for BAM:Eu, the two-color ratio exhibited insensitivity to oxygen concentration. The results conclude that YAG:Pr and BAM:Eu phosphors are applicable for phosphor thermometry to domains where oxygen concentration varies.
