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The Compositions and Pore Structures of Benshanzhu Zisha Ceramics

Yu Lin, Chunyan Hu, Defang Ding, Haidong Hang, Chunrui Yang, Yuanbing Li, Yi Shen

Journal of Ceramic Science and Technology, Vol. 12, No. 2 (2021), pp. 107-114

DOI: 10.4416/JCST2021-00004

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Abstract

Yixing Zisha ceramics are popular traditional tea-sets with a long history in China but there have seldom been studies exploring their compositions and microstructures. In this work, Benshanzhu-Zisha, a typical representative of Zisha clay from the city of Yixing in China, is investigated. The XRD results demonstrate that the Benshan Zhu clay is a natural mineral compound with a high content of hematite. After sintering, in comparison with pottery and porcelain, Benshanzhu-Zisha has the highest hematite (11.5 wt%) and amorphous phase (71.2 wt%) and the lowest mullite phase (10.7 wt%). Moreover, there are many dispersed and thin pores contained in the Benshanzhu-Zisha, ranging from nanometers to microns in size, and there are large numbers of hematite particles in the pores. It is the unique pore structures that make Benshanzhu-Zisha the perfect vessel for brewing tea, impermeable to water but gas \"breathable\".

Keywords

Zisha, traditional ceramics, Yixing, pore structures

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