Picture of DNA strand

Pioneering chemical biology & medicinal chemistry through Open Access research...

Strathprints makes available scholarly Open Access content by researchers in the Department of Pure & Applied Chemistry, based within the Faculty of Science.

Research here spans a wide range of topics from analytical chemistry to materials science, and from biological chemistry to theoretical chemistry. The specific work in chemical biology and medicinal chemistry, as an example, encompasses pioneering techniques in synthesis, bioinformatics, nucleic acid chemistry, amino acid chemistry, heterocyclic chemistry, biophysical chemistry and NMR spectroscopy.

Explore the Open Access research of the Department of Pure & Applied Chemistry. Or explore all of Strathclyde's Open Access research...

Reusable thermal history sensing via oxidation of a divalent rare earth ion-based phosphor synthesized by the Sol-Gel process

Yáñez-González, Álvaro and Skinner, Stephen and Beyrau, Frank and Heyes, Andrew L. (2015) Reusable thermal history sensing via oxidation of a divalent rare earth ion-based phosphor synthesized by the Sol-Gel process. Heat Transfer Engineering, 36 (14-15). pp. 1275-1281. ISSN 0145-7632

Text (Yanez-Gonzalez-etal-HTE2016-Reusable-thermal-history-sensing-via-oxidation)
Accepted Author Manuscript

Download (794kB) | Preview


Temperature measurements in harsh environments, such as those present in gas turbines, are of great importance but very hard to obtain. Sometimes, on-line measurements are not possible, and instead, the temperatures during operation are recorded using so-called thermal history sensors and read off-line. Although thermal paints have been used for many years as thermal history sensors, they present some disadvantages. Recently, a new method based on irreversible changes in the emission properties of phosphor materials when they are exposed to high temperatures has been proposed. It has been demonstrated that the process of oxidation from Eu2+ to Eu3+ is temperature sensitive up to 1400°C. In this paper, we describe the manufacture of BaMgAl10O17:Eu (BAM:Eu) using a sol–gel process, and report optical properties interrogated after heat treatments in air and argon atmospheres, which confirm that after treatment in argon, the oxidation process can be reversed. This suggests a promising reusability of the phosphor as a thermal history sensor. A temperature-dependent measurand based on the change of optical properties with temperature has been defined with a dynamic range from 700°C to 1100°C. The effect of exposure time to a certain temperature on this measurand has also been addressed.