Selection and effect mechanism of cordierite slurry dispersant for aqueous tape-casting

Cordierite powder derived from sol-gel method were used as raw materials.The dispersant effect of polyvinylpyrrolidone,sodium polyacrylate,sodium polyphosphate and sodium citrate were investigated,respectively.It turned out that the dispersant effect of sodium polyacrylate was the best according to measurement results of conductivity,viscosity and sedimentation height.The dispersant sodium polyacrylate had good dispersion ability by electrostatic forcing and steric hindrance effect to the cordierite slurry.And its adsorption configuration changed with the increase of pH value.The sodium polyacrylate has the best dispersibility under the weight content of five percents.