Ceramics-Silikáty 39 (4) 135-143 (1995)

ZIRCONIA BASED ORGANIC PRECURSOR INFILTRATION AS A METHOD FOR PREPARATION OF ZTA CERAMICS, PART 1 - INFILTRATION

D. Galusek, J. Majling

ZTA ceramics was prepared by liquid infiltration of alumina matrix with two different organic precursors of zirconia. The infiltration procedure, precursor pyrolysis and the phase development during the crystallisation of precipitated zirconia is described. Optimisation of the heating schedule during the precursor pyrolysis as well as optimisation of the maximal heating temperature with respect to the maximal content of tetragonal zirconia is also performed. Dense Al₂O₃ with high volume fraction of tetragonal zirconia (up to 50 vol. % of ZrO₂ in the matrix) homogeneously distributed in the bulk of the alumina body was prepared.