The coating technology based on the sol-gel process has revealed a great reliability in industrial application. In this method very homogeneous oxide films are usually prepared by dip or spin coating and afterwards are dried and fired in two separate processes using a furnace. The high temperature needed for the densification of the coatings, and the repetition of the depositoin and thermal processes necessary to produce thick coatings are, however, drawbacks as the speed-limiting factor of the coating process is by far the substrate/coating cooling rate. During the last decade several attemps have been made to overcome these disadvantages by using electromagnetic radiation such as UV, visible or IR radiation as a densification energy source. In this work preliminary data to fire large substrates at high firing speeds up to 10-15cm/2s is presented.
