Optical temperature sensing properties based on upconversion emission of Er-doped 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ferroelectric ceramics are reported. The fluorescence intensity ratio of green upconversion emissions at 525 and 550 nm in the temperature range of 200–443 K was investigated. The maximum sensing sensitivity and temperature resolution were found to be 0.0044 K−1 and 0.4 K, respectively, suggesting that the Er-doped 0.5Ba(Zr0.2Ti0.8)O3- 0.5(Ba0.7Ca0.3)TiO3 ferroelectric ceramic possesses potential application in optical temperature sensing. Ferroelectric and piezoelectric properties were also investigated. These results reveal that the Er-doped 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3 ferroelectric ceramic is a promising multifunctional sensing material.
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Du et al. (2014) studied this question.
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