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Mineralogical Composition and Physical Variation of Reproduced Potteries based on Chemical Composition and Firing Temperature  

Kim, Su-Kyoung (Conservation Science Division, National Research Institute of Cultural Heritage)
Han, Min-Su (Conservation Science Division, National Research Institute of Cultural Heritage)
Moon, Eun-Jung (Conservation Science Division, National Research Institute of Cultural Heritage)
Kim, Young-Hee (Conservation Science Division, National Research Institute of Cultural Heritage)
Hwang, Jin-Ju (Conservation Science Division, National Research Institute of Cultural Heritage)
Lee, Han-Hyoung (Conservation Science Division, National Research Institute of Cultural Heritage)
Publication Information
Journal of Conservation Science / v.26, no.3, 2010 , pp. 311-324 More about this Journal
Abstract
The purpose of this study aims to reveal characteristics of reproduced potteries which made with clays of various chemical compositions in different firing temperatures and thereafter to provide comparative samples for identifying the manufacturing techniques of earthenwares from archaeological excavation by reproducing and characterizing sample under controlled conditions. For this study, various samples of earthenware are reproduced using different types of raw clays at several different firing temperature, followed by physical and structural characterization. Chemical specification were varied from different types of clay, which were calculated by Seger formula, and four different types of clay were selected based on different mole ratio of acidic oxide. The temperatures of firing of 7 samples were varied between $600^{\circ}C$ to $1200^{\circ}C$ at the interval of $100^{\circ}C$ for each sample. The result of analysis revealed that each reproduced earthenware has different chemical compositions divided into two groups: 1. Sample Y(6.10) and Sample G(5.85) clay; 2. Sample H(3.41) and Sample S(2.85) clay. The former which has higher mole ratio of acidic oxide than the latter, shows higher level of rockwell hardness at the same firing temperature. In addition, all four samples presented that as the firing temperature was increased, absorption rates of Y and G were abruptly dropped at $1200^{\circ}C$. Furthermore the more mole ratio of acidic oxide increase, the more microtexture of samples were vitrificated. Such result reveals that mole ratio of acidic oxide influence physical and microtextural characteristics of earthenwares, and it can be used as the comparison data in the understanding of manufacture techniques for the earthenwares of similar chemical composition.
Keywords
Reproduced earthenware; Acidic oxides; Firing temperature; Chemical composition; Absorption rate; Vitrification controlled;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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