ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The dispersion and stability of PZT aqueous suspensions were investigated by usingammonium salt of polyacrylic acid (PMAA-NH4) as the dispersant. By observing the sedimentationbehavior and measuring the viscosity, the effects of dispersant concentration and pH value on thedispersion and stability of the suspensions were studied. The experiment results showed that the optimumconcentration of PMAA-NH4 and the optimum pH were 0.25-0.45 wt.%( by weight of the PZT powders)and 8.5-10, respectively. When the dispersant concentration was about 0.45 wt.%, and pH value wasabout 9.4, the stable PZT suspensions with high solids loading (up to 52 vol.%) and low viscosity (〈1Pa.s)was obtained for gelcasting. The microstructure of ceramic formed by gelcasting was denser and morehomogeneous than that by die pressing
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1038.pdf
