Composition and microstructure of Koryo celadon in KOREA

초록

In this study, the characteristics of porcelain body, glaze and inlay were analyzed, using Koryo celadon shard of 10th-14th century. The characterization of celadon shard were investigated by Scanning electron microscopy, X-ray fluriscence, X-ray diffractometer, and Dilatometer. The characteristics of celadon shard is similar in color to gray-green with the naked eye, and the thickness of glaze layer and body is about 149.5-200μm and 4.2-8.8mm. The chemical compositions of body is SiO<inf>2</inf> 70.9-74.8wt%, Al<inf>2</inf>O<inf>3</inf> 19.4-20.5wt%, RO▪RO<inf>2</inf>(R=Ca, Mg, K) 4.0-7.0wt% and Fe<inf>2</inf>O<inf>3</inf>1.3-2.7wt% in weight ratio. The high contents (12.5-24.6wt%) of calcium oxide in the glaze is considered lime type. In the chemical compositions of the white and black inlay Al<inf>2</inf>O<inf>3</inf> is 33.2-37.1wt% and 19.7wt%, and Fe<inf>2</inf>O<inf>3</inf> is 1.1wt% and 5.6wt% in weight ratio, respectively. The density of black inlay is higher than that of white inlay, and firing temperature for celadon may be about 1250°. © (2015) Trans Tech Publications, Switzerland.

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