Stability properties of alumina-zircon-SiC suspensions by adsorption of Dolapix onto the particles

作者：Majidian H^*; Ebadzadeh T; Salahi E

来源：Journal of Ceramic Processing Research, 2013, 14(3): 342-348.

• Alumina-zircon suspensions
• SiC addition
• Dolapix
• Dispersant adsorption

The dispersing behavior of alumina-zircon-SiC concentrated suspensions (up to a solids volume fraction of 50%) in aqueous media was monitored by zeta potential analyses, the amount of adsorbed dispersant on the surfaces and the slip casting rate as a function of SiC addition and dispersant concentration (Dolapix CE-64). The dispersant content for optimum dispersion was found to be 0.5 wt. %. The adsorbed amount of Dolapix was measured by titration and the FTIR method. Results showed that the amount of Dolapix adsorption on alumina surfaces was found to be more than the other phases (zircon and SiC). As the calculation of the Peclet number showed the stability behavior of an alumina-zircon suspension was increased by the addition of SiC particles up to 20 vol. %. Also the adsorption of Dolapix and the slip casting rate were found to decrease by increasing the SiC content. A high green density (about 63%) was obtained by the slip casting of optimum slips.

• 出版日期2013-6