Two-dimensional visualization of oxygen concentration field at high-temperature environment using phosphor Y2O3:Eu3+

In this study, a two-dimensional(2D) visualization of the oxygen concentration field in a high-temperature environment was achieved utilizing the phosphorescence of Y2O3:Eu3+. A temperature and oxygen concentration adjustable furnace was set up to study the oxygen concentration effect on the phosphorescence of Y2O3:Eu3+. Both the spectrum and decay time of phosphorescence of Y2O3:Eu3+ were found to have a direct relationship with the oxygen concentration. The spectral intensity of phosphorescence decreases as the oxygen concentration increases when the temperature exceeds 450 °C. The most sensitive peak is at its main peak at 612 nm, and its sensitivity increases with increasing temperature. For the same temperature, the sensing sensitivity decreases with the increase of the oxygen concentration is low. The decay time of phosphorescence begins to show sensitivity to oxygen concentration when the temperature exceeds 500 °C, and it decreases as the oxygen concentration increases. Similar to the intensity of the spectrum, for the same temperature, the most sensitivity is at low concentrations of oxygen. 2D oxygen concentration measurement was demonstrated in a fixed high-temperature environment, and measurements based on phosphorescence intensity (spectrum) and decay lifetime were demonstrated, showing the powerful application capability of oxygen concentration measurement at a high-temperature environment based on the phosphorescence of Y2O3:Eu3+.