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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Scientific Analysis for the Green-glazed bricks of the Sacheonwang Temple Site, Gyeongju

2011년 8월 5일 14시 06분 57초
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금 14시 : 30분
Prospects and Progress of Archaeological Chemistry
저자 및
이한형, 한민수, 김수경
국립문화재연구소 보존과학연구실, Korea
We have performed the scientific analysis using SEM-EDX, XRD, TG/DTA on 5 green glaze shard of the brick and roofing tile excavated from the Sacheonwang temple site in Gyeongju in order to verify the chemical compositions and melting temperature. The glaze samples on 2 clay statues have similar chemical composition (PbO 74~81%, SiO214~18%) and melting temperature range (970~1070℃), whereas the 2 tiles of goblin's face and 1 rhomb brick have different characteristics. Sample SC 003, one of the tiles of goblin's face, shows low melting temperature range (below 970℃), and sample SC 004, the other tile of goblin's face, shows different chemical characteristics(PbO 64~70%, SiO219~25%) compared with 2 clay statues. The green glaze on rhomb brick shows different composition compared with all the others from Sacheonwang temple site in that it does not show any impurity elements other than the main components (PbO 87~88%, SiO2 12~13%) with very low melting temperature range (750~770℃). Surprizingly, the chemical and optical characteristics of this green-glaze on rhomb brick are very similar to that on the bricks from Yeongmyo temple site, Gyeongju. The above results indicate that raw material and manufacturing method are not same for 5 green-glaze samples from Sacheonwang temple site and therefore suggests that further study on the provenance of raw material such as lead isotope analysis is necessary. Our work will provide basic data for future reproduction study of green glazed brick of Sacheonwang temple site, Gyeongju and will also serve as a reference data for the study of raw material and manufacturing method of green glaze from other sites of cultural assets