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The Compositions and Pore Structures of Benshanzhu Zisha Ceramics
Yu Lin1, Chunyan Hu1, Defang Ding1, Haidong Hang1, Chunrui Yang2, Yuanbing Li2, Yi Shen1
1 Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences (CUG), 388 Lumo Road, Wuhan 430074, P. R. China
2 Key Laboratory of Metallurgical Equipment and Control Technology, Wuhan University of Science and Technology, Wuhan, 430081, China
received March 2, 2021, received in revised form April 15, 2021, accepted May 3, 2021
Vol. 12, No. 2, Pages 107-114 DOI: 10.4416/JCST2021-00004
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".
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Keywords
Zisha, traditional ceramics, Yixing, pore structures
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