HOMOGENEOUS FUNCTIONAL CERAMIC COMPONENTS THROUGH ELECTROPHORETIC DEPOSITION FROM STABLE COLLOIDAL SUSPENSIONS. PT.1. BASIC CONCEPTS AND APPLICATION TO ZIRCONIA

Usage of stable suspensions of deagglomerated fine powders was shown to be a prerequisite to take full advantage of the potential of electrophoretic deposition. The method was improved further when starting from suspensions which were additionally sieved through a 20 micron sieve into a "cleansed and closed" deposition apparatus. Smooth zirconia tubes with green dimensions of 110 mm length, 0.5-1.5 mm wall thickness, 34 mm outer diameter were produced under these conditions. The fired tubes had a characteristic strength of sigma(c) = 420 MPa and Weibull modulus m = 15, as calculated from burst pressure of whole tubes. 29 refs.