Abstract
Accurate and sensitive remote temperature measurement over a wide range of temperatures, presumably 1000 degrees, is required in many existing and emerging applications. Novel and emerging technologies pose new requirements on the quality of temperature measuring, the resistance to disturbance by external electric and/or magnetic fields, spatial resolution, and the operating range of thermometers. Luminescence thermometry has the potential to become the technology of choice when classic methods become non-practical and/or do not offer the expected quality.Designing a luminescence thermometer capable of measuring temperature reliably over, for example, 1000 degrees range is challenging, as managing luminescence processes in such a range is extremely difficult. Yet, wide-range luminescence thermometers are of interest in such fields as aviation, space, nuclear plant, and others. Fast, accurate, and credible measurements of quickly changing temperatures are critical in these areas.In this presentation, we shall report on the thermometric competencies of a series of garnet phosphors, typically activated with Pr3+. We shall focus on the possibility of managing the physics related to energy flow between the excited levels of Pr3+ and thermal quenching of its three emissions resulting from the 5d®4f, 3PJ®3HJ and 1D2®3HJ transitions. Not only shall we demonstrate that the sensitivity of such sensors may be deliberately tuned to reach its maximum at temperatures where it is most needed, but we will also show that garnets nowadays may offer temperature measuring over a range of 800 degrees at least. This research was supported by the Polish National Science Center (NCN) under the grant #UMO2018/29/B/ST5/00420. Figure 1
Published Version
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