Effects of Trammonium Citrate on Slurry of PMN-PZT in Gelcasting Process

Abstract:

Preparation of aqueous ceramics slurry with high solid volume and low viscosity is premise and key step of gelcasting, and dispersant play important role in slurry preparation. In this paper, triammonium citrate (TAC) was used as dispersant of PMN-PZT piezoelectric ceramics slurry, the effects of TAC on slurry stability and rheological properties and dispersion mechanism of TAC were investigated by sedimentation test, viscosity, scanning electron microscopy (SEM) and FTIR analysis. The SEM results indicated that TAC could reduce the agglomeration of powder particles and make ceramic particles well-dispersed. FTIR indicated that strong chemical absorption occurred between TAC and PMN-PZT powder, and slurry stability and rheological properties of PMN-PZT slurry were improved through electrostatic interaction of TAC. The effects of TAC on sedimentation volume and viscosity have similar tendency. When TAC content was 7.5vol% and pH of slurry was about10, PMN-PZT slurry suitable for gel-casting could be acquired.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 1050-1053
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.1050
• Online since: February 2012
• Authors: Jing Hong Du, Guo You Gan, Ji Kang Yan, Jian Hong Yi, Jia Min Zhang
• Keywords: Gecasting, PMN-PZT, Slurry, Triammonium Citrate

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