Preparation of Low-Expansion and Heat-Resistant Purple  Clay Pottery Using Hainan Zijin Clay

doi:10.16552/j.cnki.issn1001-1625.2025.0078

Abstract

Abstract: In this study, the Hainan Zijin clay, spodumene, lithium white stone, burnt talc and kaolin were used as raw materials. The formula composition was optimized by changing the content of burnt talc and kaolin, and the coefficient of thermal expansion of sample was adjusted to prepare low-expansion and heat-resistant purple clay pottery. The change of thermal shock resistance was characterized by coefficient of thermal expansion and flexural strength. The results show that when the content of Zijin clay is 32.8% (mass fraction), the content of spodumene is 32.8% (mass fraction), the content of lithium white stone is 9.4% (mass fraction), the content of burnt talc is 10.0% (mass fraction), and the content of kaolin is 15.0% (mass fraction), the coefficient of thermal expansion of purple clay pottery sample prepared by raw material ball milling for 9 h and holding at 1 150 ℃ for 60 min is the lowest (1.32×10^-6 ℃^-1), the water absorption rate is 0.25%, and the flexural strength is 83.89 MPa.

Key words: Hainan Zijin clay, spodumene, β-spodumene solid solution, coefficient of thermal expansion, flexural strength

CLC Number:

TQ174.73

HE Mengzhen, LI Yueming, ZHANG Xiaona, WANG Yuhui, LI Kai, HUANG Yuanyuan. Preparation of Low-Expansion and Heat-Resistant Purple Clay Pottery Using Hainan Zijin Clay[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(8): 3005-3013.

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Preparation of Low-Expansion and Heat-Resistant Purple Clay Pottery Using Hainan Zijin Clay

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