MgAl2O4:Cr3+ luminescence thermometry probe in the physiological temperatures range. Issue 19 (1st October 2021)

• Record Type: Journal Article
• Authors: Ćirić, Aleksandar; Ristić, Zoran; Periša, Jovana; Antić, Željka; Dramićanin, Miroslav D.
• Is Part Of: Ceramics international. Volume 47:Issue 19(2021)
• Page Start: 27151
• Page End: 27156
• Publication Date: 2021-10-01
• Subjects: MgAl2O4 -- Cr3+ -- Luminescence thermometry -- Luminescence probe; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.06.131
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Temperature sensing from the photoluminescence of MgAl2 O4 :Cr 3+ ceramic powder is systematically investigated. Material was prepared by self-propagating high temperature synthesis method. In this host, Cr 3+ experiences the strong crystal field, so the overlapping emissions from 2 E and 4 T2 energy levels are observed. Emission and excitation spectra were recorded from 300 K to 540 K. The broad photoluminescence attributed to 4 T2 → 4 A2 emission gains in intensity with increase in temperature on account of 2 E→ 4 A2 emission intensity until 460 K when both emissions start quenching. The emissions were separated by deconvolution at each temperature and used for the luminescence intensity ratio temperature readout method. The obtained relative sensitivity exhibited high values in the physiological range, from 3.5 %K −1 at 300 K to 2.9 %K −1 at 330 K, above 2 %K −1 below 400 K and above 1 %K −1 between 400 K and 540 K.