YAG:Dy and YAG:Tm Fluorescence Above 1400 C

摘要

Fluorescence from three samples of YAG:Tm, and three samples of YAG:Dy, with different activatorconcentrations, was measured for a wide temperature range, extending from room temperature to about1700 C. Fluorescence lifetimes were measured for emissions at 460 nm from the YAG:Tm and at 453,480, and 575 nm from YAG:Dy. The measurement system is described, including techniques for accommodatingthe high background blackbody radiation encountered at these very high temperatures.Data compilations are shown, including the fluorescence lifetimes over the temperature range of themeasurement. This study has extended the high-temperature range of phosphor thermometry by approximately200 C and shown the feasibility of using phosphor materials for very high temperature noncontactthermometry, opening up further applications for engines, materials, high-temperature processing,and related areas.