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BaAl2O4:Eu2+-Al2O3 ceramics for wide range optical temperature sensing
Xiaomeng Yin1, Hui Lin1, Dawei Zhang1
1Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, No. 516 Jun Gong Road, Shanghai 200093, China. dwzhang@usst.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|December 22, 2021
Summary
New BaAl2O4:Eu2+-Al2O3 ceramics show promise for non-contact temperature sensing. Their fluorescence intensity ratio increases with temperature, offering a reliable method for precise measurements.
Area of Science:
- Materials Science
- Optical Materials
- Ceramics
Background:
- Barium aluminum oxide (BaAl2O4) doped with europium (Eu2+) is a known phosphor.
- Alumina (Al2O3) addition can modify ceramic properties.
- Spark plasma sintering (SPS) is an advanced sintering technique.
Purpose of the Study:
- To prepare and characterize BaAl2O4:Eu2+-Al2O3 multiphase ceramics.
- To investigate the optical properties and temperature sensing capabilities of these ceramics.
- To evaluate the sensitivity and potential applications in non-contact thermometry.
Main Methods:
- Spark plasma sintering (SPS) for ceramic preparation.
- Optical property measurements under 365 nm UV excitation.
- Temperature-dependent fluorescence spectra measurement (4 K-434 K).
- Calculation of fluorescence intensity ratio (FIR) for temperature sensing.
Main Results:
- Successfully synthesized BaAl2O4:Eu2+-Al2O3 ceramics with tunable luminescent color.
- FIR monotonically increased with temperature, confirming suitability for temperature sensing.
- Achieved high absolute sensitivity (>0.005 K-1) and relative sensitivity (>0.75% K-1) in specific temperature ranges.
Conclusions:
- BaAl2O4:Eu2+-Al2O3 ceramics exhibit excellent temperature sensing performance.
- The material is a promising candidate for non-contact temperature sensing applications.
- Tunable optical properties and high sensitivity make it attractive for advanced thermometry.
