Defect elimination to enhance photoluminescence and optical transparency of Pr-doped ceramics for self-calibrated temperature feedback windows  

作　　者：Kailei Lu Yucheng Ye Wenhan Han Gang Cheng Xinghua Zhu Jianqi Qi Tiecheng Lu 

机构地区：[1]College of Physics,Sichuan University,Chengdu 610064,China [2]Key Laboratory of High Energy Density Physics of Ministry of Education,Sichuan University,Chengdu 610064,China [3]Key Laboratory of Radiation Physics and Technology,Ministry of Education,Sichuan University,Chengdu 610064,China [4]School of Chemistry and Chemical Engineering,Sichuan University of Arts and Science,Dazhou 635000,China [5]School of Intelligent Manufacturing,Sichuan University of Arts and Science,Dazhou 635000,China

出　　处：《Journal of Advanced Ceramics》2023年第4期681-694,共14页先进陶瓷（英文）

基　　金：supported by the National Natural Science Foundation of China(U21A20441);the Nuclear Power Development Programme,the Key Research and Development Program of Sichuan Province(2021YFG0375);the Key Science and Technology Project of Sichuan Province(2020ZDZX0012);the Science and Technology Planning Project of Dazhou(21DWHZ0005);the Cooperation Project of Sichuan University and Dazhou(2021CDDZ-02).

摘　　要：Pr-doped metal oxide polycrystalline transparent ceramics are highly desirable for photothermal window systems served in extreme environments;however,obtaining efficient photoluminescence(PL)together with high transparency in these ceramics is still posing serious challenges,which undoubtedly limits their applications.Here,Pr-doped Y_(2)Zr_(2)O_(7)(YZO)transparent ceramics,as an illustrative example,are prepared by a solid-state reaction and vacuum sintering method.Owing to the elimination of defect clusters[Pr_(Y)^(4+)-O^(2-)Pr_(Y)^(4+)]and[Pr_(Y)^(4+)-e′]without the introduction of impurities and additional defects,the fabricated YZO:Pr ceramics exhibit high transparency(74%)and efficient PL(39-fold enhanced)after air annealing plus vacuum re-annealing treatment.Moreover,upon 295/450 nm excitation,the emission bands(blue,green,red,and dark red)from YZO:Pr ceramics present different temperature-dependent properties due to the thermalquenching channel generated by the intervalence charge transfer(IVCT)state between Pr_(Y)^(4+)and Zr^(4+)ions.Furthermore,a self-calibrated temperature feedback window with the same fluorescence intensity ratio(FIR)model(I_(613)/I_(503),where I represents the intensity)under different excitation light sources(295 and 450 nm)is designed.The developed photothermal window operated in a wide temperature range(303-663 K)shows relatively high sensitivities(absolute sensitivity(Sa)and relative sensitivity(S)reach 0.008 K^(-1)at 663 K and 0.47%K^(-1)at 363 K,respectively),high repeatability(>98%),and low temperature uncertainty(T<3.2 K).This work presents a paradigm for achieving enhanced PL along with elevated transparency of lanthanide(Ln)-doped ceramics through vacuum re-annealing treatment engineering and demonstrates their promising potential for photothermal window systems.

关 键 词：transparent ceramics temperature sensing Pr^(3+) luminescence enhancement vacuum annealing 

分 类 号：TQ174.758.23[化学工程—陶瓷工业]