“According to the latest report, a research team used urea assisted co precipitation method to prepare ZrO2: Yb3+/Er3+materials, and investigated the effect of Yb3+/Er3+doping on the crystal structure of ZrO2, as well as the luminescence thermal stability and temperature sensing characteristics of ZrO2: Yb3+/Er3+. The research results indicate that under 980 nm laser excitation, ZrO2: Yb3+/Er3+exhibits upconversion luminescence without thermal quenching characteristics, achieving temperature sensing with four fluorescence intensity ratio signals responding simultaneously and improving temperature measurement accuracy.”