ZOU Yuanzhuang1,2, LI Xiaohong1,2, HU Fei1,2, XIONG Wei 1, FU Mengqian 2,YU Hao 2
(1. The National Engineering Research Center for Domestic and Building Ceramics, Jingdezhen Ceramic Institute, Jingdezhen
333001, Jiangxi, China; 2. School of Materials Science and Engineering, Jingdezhen Ceramic Institute,
Jingdezhen 333403, Jiangxi, China)
Abstract: The dispersive effect of commercial ceramic deflocculates and their mixtures, such as sodium metasilicate pentahydrate, sodium tripolyphosphate, humic acid sodium salt, on a building ceramic slurry has been evaluated through the observation of the slurry’s fluidity, density, water content, zeta potential, and thixotropy. It has been shown that a single deflocculate has inadequate dispersive effect on the building ceramic slurry, but their mixture could improve their performance and make the slurry meet the industrial requirements. With the addition of 0.3% sodium metasilicate pentahydrate and 0.1% humic acid sodium salt, the flow rate is 34 s, and the thixotropy is 1.029. When 0.5% sodium metasilicate pentahydrate and 0.15% sodium tripolyphosphate have been added, the flow rate reaches 52 s, and the thixotropy is 1.019. When 0.1% sodium tripolyphosphate, 0.3% sodium metasilicate pentahydrate and 0.2% humic acid sodium salt have been added, the flow rate is 44 s, and the thixotropy is 1.023.
Key words: building ceramics; deflocculant; combined addition; slurry performance