Firing temperature of a clay core sample in a bronze tripod from Daxinzhuang Site in China using TL techniques
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USTC Archaeometry Laboratory, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, PR China
The School of History and Culture, Shandong University, Jinan, Shandong, 250100, PR China
Online publication date: 2013-09-27
Publication date: 2013-12-01
Geochronometria 2013;40(4):317-321
In this paper, we studied the thermal history of a clay core sample from one leg of a bronze tripod unearthed at Daxinzhuang Site, Shandong, China. The properties of the luminescence signals of quartz depend on the maximum temperature at which the quartz was annealed in the past. We examined the feasibility of measuring the thermoluminescence (TL) sensitivity change of quartz for exploring the firing temperature of archaeological materials. The sensitization factor of the 110°C TL peak (S2/S1) and the ratio of the 210°C TL peak to the 110°C TL peak at different annealing temperatures were utilized to unveil the firing temperature in the clay core sample. The firing temperature of the clay core sample was approximately 700°C–800°C, proving the clay core has been fired. This result proved that the clay core has been fired by human agencies and indicated on the temperature of the clay core in drying and firing given by the foundry workers before the actual casting step.
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