resumo
Sintered transparent ceramics, presenting extraordinary resistance to thermal shocks, incomparably larger than glasses, glass ceramics, and single crystals, maybe valuable luminescence thermometers especially for high-temperature applications. The literature on that subject is, however, very much limited at present. In this paper, the performance of La0.4Gd1.6Zr2O7:0.1%Pr3+ sintered transparent ceramics as a luminescence thermometer was investigated. Temperature dependence of the intensity ratio of emissions from P-3(0) and D-1(2) levels of the Pr3+ activator was found useful to measure temperature with reasonable relative sensitivity and accuracy over the 15-650 K range - one of the broadest achievable up to date. Time-resolved spectroscopy enabled distinct emissions from D-1(2) and P-3(0) in the red part of the spectrum. This allowed achieving an impressive relative sensitivity of the La0.4Gd1.6Zr2O7:0.1%Pr luminescence thermometer which exceeded 0.81% K-1 at 650 K.
palavras-chave
GLASS-CERAMICS; TEMPERATURE; INTENSITY; PHOTOLUMINESCENCE; CONVERSION
categoria
Materials Science; Physics
autores
Trojan-Piegza, J; Brites, CDS; Ramalho, JFCB; Wang, ZJ; Zhou, GH; Wang, SW; Carlos, LD; Zych, E
nossos autores
Carlos Brites
Professor associado
João Filipe Candeias Baptista Ramalho
Estudante de doutoramentoProjectos
agradecimentos
This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. Financial support from FCT (PTDC/CTM-NAN/4647/2014, NANOHEATCONTROL - POCI01-0145-FEDER-031469) is acknowledged. JFCBR thanksWINLEDs project (CENTRO-01-0145-FEDER-03051) for grant. J. T.-P. and E. Z. acknowledge the support of this research by the National Science Centre (NCN), Poland under grant UMO-2017/25/B/ST5/00824. E. Z. and L. D. C. are grateful to the Polish National Agency for Academic Exchange (NAWA) for support under the NAWABekker PPN/BEK/2018/1/00333/DEC/1 and NAWA-Ulam PPN/ULM/2019/1/00077/U/00001 projects, respectively. A primary research was partially supported by POIG.01.01.02-02-006/09 project financed by the European Regional Development Fund within the Innovative Economy Program. Priority I, Activity 1.1. Sub-activity 1.1.2.