Abstract
Multilayer laminates with gradients in material composition and porosity were fabricated by the combination of ZrO2, Al2O3–ZrO2 and Al2O3–MgAl2O4 preceramic papers with MgO–MgAl2O4, Al2O3 and MgAl2O4 ceramic green tapes. A ZrO2–loaded adhesive based on an aqueous dispersion of copolymerised polyvinyl acetate served as the interface adhesive. The shrinkage behaviour of the individual layers was adapted by combining coarse and fine grained ceramic powders in order to avoid crack formation and delamination during firing. Defect-free multilayer laminates were obtained after sintering at 1700°C for 5 h which offer a high potential for application in refractory functional components.
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