LI YueMing, WU Feng, KONG Lingjun, XIE Jun

(Key Laboratory of Advanced Ceramic Materials of Jiangxi Province, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen Jingdezhen, 333403, China)

Abstract:The chemical composition, mineral composition, physicochemical properties and microstructures of Lianxingcun clay in Dafang county of Guizhou province were characterized by XRF, XRD, DTA-TG, FE-SEM and TEM. Its various processing properties were investigated. The results indicate that the main mineral components of the clay include illite (47.16wt%),quartz (50.79wt%) and anatase (1.16wt%). It shows typical sheeting and layered structure. The clay has low plasticity, low cation exchange capacity value, less liquidity, high thixotropy, small drying shrinkage and high drying strength. Although the alkaline metal oxide and alkaline earth metal oxide (3.57wt%) contents are low, it has relatively low sintering temperature(1200℃~1250℃) because of its low contents of Al2O3 (14.84wt%). And also, its relatively high Fe2O3 (1.66wt%) and TiO2 (0.23wt%) contents lead to the low firing whiteness , which is only 23.04% when sintered at 1250℃.

Key words:clay mineral; illite; physicochemical property; processing property