Abstract
Pottery is a gem in the history of human civilization and a crystallization of human wisdom. Yunnan Jianshui purple pottery is one of the four famous types of pottery in China, with a long history and superb craftsmanship. Used as tableware, research on the composition and element dissolution of pottery is extremely significant for production and health. This paper takes Jianshui purple pottery as its research object, samples its raw ores and finished products, and conducts X-ray fluorescence, scanning electron microscopy, inductively coupled plasma mass spectrometry experiments, and dissolution tests. The chemical composition, microstructure, and trace element concentrations of pottery before and after firing were measured. Results show that the dissolution of purple pottery under various use scenarios is low and meets health requirements. Combined with the characteristics of purple pottery, the composition changes and the mechanism of change before and after firing are discussed, which can be used as the theoretical basis for improving pottery production in the future.
Highlights
IntroductionAs an exquisite craft, is a gem of human civilization
The firing temperature of Jianshui purple pottery is 1140–1160 ◦ C, which would melt iron oxides in the in the presence of fluxes, so it leads to the loss of Fe
The main change in the chemical composition of Jianshui purple pottery before and after firing is reflected in the decrease in Fe and LOI content
Summary
As an exquisite craft, is a gem of human civilization. It is a utensil mainly made of clay, which was usually used as container of food or water in ancient times. The mass production of exquisite pottery is mainly for decorative crafts or tea sets. The concentrations of trace elements except Zr in the other samples were lower than or close to the concentrations in the crust, indicating that the raw material composition of the pottery was close to the natural composition of the earth. By comparing the test results of JSM-R with JSP-R and JSP-O, the concentration changes of trace elements in pottery before and after firing could be found.
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