Wydział Chemii

Joanna Trojan-Piegza

Carlos D. S. Brites

Joāo F. C. B. Ramalho

Zhengjuan Wang

Guohong Zhou

Shiwei Wang

Luís D. Carlos

Eugeniusz Zych

2020

Journal of Materials Chemistry C

8

7005-7011

10.1039/d0tc00861c

Naukowa

Angielski

Artykuł

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 La_0.4Gd_1.6Zr₂O₇:0.1%Pr³⁺ sintered transparent ceramics as a luminescence thermometer was investigated. Temperature dependence of the intensity ratio of emissions from ³P₀ and ¹D₂ 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 ¹D₂ and ³P₀ in the red part of the spectrum. This allowed achieving an impressive relative sensitivity of the La_0.4Gd_1.6Zr₂O₇:0.1%Pr luminescence thermometer which exceeded 0.81% K⁻¹ at 650 K.

http://dx.doi.org/10.1039/d0tc00861c

https://www.rsc.org/