Akademik Veri Yönetim Sistemi
4. International Conference on Materials Science, Mechanical and Automotive Engineerings and Technology , Nevşehir, Türkiye, 26 - 28 Mayıs 2021, ss.46-51
The thermoluminescence (TL) properties of Ca3Al2O6 phosphor doped with various concentrations of Dy3+prepared by gel combustion synthesis have been presented. X-ray diffraction (XRD) patterns indicate the formation of desired phases of each sample. The TL glow curves of Ca3Al2O6:x%Dy3+ (x = 0.5, 1.0, 2.0, 3.0, 5.0, and7.0) phosphors have the same structure with peaks at around 70, 125, and 205 C, respectively. 5.0% Dy3+Ca3Al2O6 phosphor was selected for the further TL measurements and preheating test was applied to work on higher temperature TL peak maximum. The TL glow curve of preheated Ca3Al2O6:5.0%Dy3+ shows linearity between0.5 and 100 Gy with increasing exposure. Reusability is found within the 5% confidence interval having a maximum difference of 1% for 15 repeated TL readings. TLglowcurve of the preheated phosphor was also investigated by changing heating rates and various heating rate(VHR)method was applied to define activation energy E and the frequency factor s of a single peak maximum. The TM-Tstopmethod was inserted to search the possible locations of the overlapping TL peaks within the peak maximum ofCa3Al2O6:5.0%Dy3+ phosphor. TM-Tstop and glow curve deconvolution (GCD) methods present the existence of four overlapping TL peaks.