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Journal of Conservation Science 2009;25(4):411-420.
Published online December 20, 2009.
안동 옥동유적 출토 靑銅匙의 미세조직 및 산지연구
정광용, 이주현
A Study of the Microstructure and Provenance Area of Bronze Spoons Excavated from the Ok-dong Site in Andong
Kwang Yong Chung, Joo Hyun Lee
초 록
경북 안동 옥동유적에서 출토된 청동유물 14점 중 靑銅匙 5점을 대상으로 하여 ICP, 미세조직, TIMS 등의 과학적 분석을 실시하였다. 분석 결과 靑銅匙는 Cu- Sn 합금으로 Cu 75%이내, Sn 21~23%로 방짜유기에 해당되며, Pb, Fe, Zn 등이 미량성분으로 첨가되었다. 특히 납(Pb)은 0.04%의 미량으로 존재하는 것으로 보아 제련시 원광석에 포함된 불순물로 보인다. 靑銅匙의 미세구조를 볼 때 靑銅匙의 모양으로 골을 판 거푸집을 써서 주조한 다음 586℃ 근방에서 가공하여 급랭한 것으로 추정된다. 열이온화질량분석(TIMS) 측정을 시행하여, 한국, 중국, 일본 납광석의 산지별 데이터베이스에 대조해 봤을 때 靑銅匙의 원료산지는 중국 남부의 납동위원소비와 유사함을 알 수 있다.
중심어: 안동 옥동유적, 청동숟가락, 靑銅匙, 미세조직, 산지연구
A series of scientific analyses, including ICP-AES, microstructure, and TIMS, were carried out on 5 bronze spoons among 14 bronze artifacts excavated from the Ok-dong site in Andong, North Gyeongsang Province. The results of analysis showed that the bronze spoons were formed from an alloy of no more than 75% Cu and 21~23% Sn, placing it in the category of brassware, with trace elements such as Pb, Fe, and Zn. In particular, plumbum Pb contents of which traces of 0.04% were found, appears to have been added as an impurity during smelting. The microstructure of the bronze spoons suggests that the casting process involved using a spoon-shaped hollow mold, followed by an ropid-cooling process after the shape was perfected at approximately 586℃. After comparison of data measured from thermal ionization mass spectrometry (TIMS) of galena from Korea, China, and Japan, it appears that the raw materials for the bronze spoons included galena (lead sulfide) produced from the southern part of China.
Key Words: Ok-dong site in Andong, Bronze spoons, Microstructure analysis, Production areas

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