Abstract
A sol gel based coating technology has been developed for making high quality, thick ceramic coatings. The films are ceramic-ceramic 0–3 composites made by dispersing ceramic powders in a sol gel solution. The resulting system has all the benefits of sol gel, i.e. ease of fabrication, ability to coat complex geometries and relative cost effectiveness, but is not limited in film thickness. Lead zirconate titanate (PZT), yttria- and ceria-stabilized zirconia, titania, silica and alumina films have been fabricated in the 5–200 μm thickness range. The electrical properties of the PZT films are comparable with those of the bulk ceramic, and the zirconia and alumina films exhibit excellent potential as corrosion- and wear-resistant coatings as well as thermal barrier and performance enhancing coatings.
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