Characteristics of TL Signal and Multi-wavelength OSL Signal against Firing Temperature of White Porcelain

Abstract

We analyzed the characteristics of white porcelain fired at different temperatures (800, 1200, 1350℃) by measuring changes in thermal luminescence(TL) and multi-wavelength (IR, orange, green, blue, UVA) optically stimulated luminescence(OSL) signal. White porcelain fired at 800℃ showed high intensity TL signals over a wide temperature range of 100 to 400℃, whereas white porcelain fired at 1200 and 1350℃ showed TL peaks at 100 and 210℃. Moreover, the OSL signals of white porcelain fired at 800℃, increased linearly according to the amount of irradiation, under IR, orange, green, blue and UVA stimulation. However, the OSL signals of white porcelain fired at 1200℃ increased linearly only under blue and UVA stimulation, while those of white porcelain fired at 1350℃ increased linearly only under UVA stimulation. In general, the strength of the TL/OSL signal was weakened as the firing temperature increased, which seems to be due to the vitrification caused by the high-temperature firing process. Therefore, it was found that it is important to select the optical stimulation source of the proper wavelength during TL/OSL dating to white porcelain.