Akademik Veri Yönetim Sistemi
V-International European Conference on Interdisciplinary Scientific Research, Valencia, İspanya, 28 - 29 Ocak 2022, ss.1
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.