Evaluation of Preliminary Thermoluminescence Characteristics of Porcelain Content Used in Light Switches


Portakal Uçar Z. G.

V-International European Conference on Interdisciplinary Scientific Research, Valencia, Spain, 28 - 29 January 2022, pp.1

  • Publication Type: Conference Paper / Summary Text
  • City: Valencia
  • Country: Spain
  • Page Numbers: pp.1
  • Çukurova University Affiliated: Yes

Abstract

In this study, the preliminary thermoluminescence (TL) properties of porcelain materials which are frequently used in light switches in many buildings, were investigated. Porcelain powder samples were annealed between 500 and 1000 °C in increments of 100 °C, respectively, using an optimum annealing time of 30 min. Structural characterizations of the prepared non-annealed and annealed samples were utilized by X-ray powder diffraction (XRD). Approximately 20 mg of non-annealed and annealed powder samples were irradiated with a beta source and TL glow curves were obtained using different optical filter combinations in the TL reader. The most convenient TL glow curves with the optimum TL intensity were obtained by using IRSL-TL 565 nm filter. As a result of the XRD analysis, it was observed that the annealing did not cause a visible change in the structure. Similarly, there was no change in the TL glow curve of the porcelain samples after irradiation under the same conditions. 500 °C was selected as an optimum annealing temperature for the porcelain sample to carry out the further TL investigations. It was observed that the glow curve obtained after 10 Gy test dose had two visible TL maxima around 85 and 195 °C, and the low temperature maximum was erased by applying the preheat test. After preheating, dose-response (between 0.1 and 500 Gy), reusability (for 15 cycles), the effect of heating rate (between 0.1 and 10 °C/s), and short-term fading were investigated for non-annealed and annealed at 500 °C porcelain samples by TL method. In both samples, the reusability was within the ± 5% confidence interval. In addition to a visible maximum of 195 °C, a maximum of around 350 °C was observed at high doses. Moreover, it was observed that the peak area decreased substantially with increasing heating rate due to the thermal quenching.