Prodn. of strong ceramic titanium di:oxide thin film at low temp.

摘要

Prod. of ceramic films is carried out with a dispersion (I) prepd. by (i) hydrolysing a hydrolysable Ti cpd., e.g. 10-40 pref, 29 pts.wt. Ti(OPr-i)4, (II) with 5-20 pref. 14 pts.wt. water, (ii) peptising by adding a strong acid, pref. 42 pts.wt. 25% HCl, and stirring; and (iii) adding 10-25, pref. 15 pts.wt. nanocrystalline TiO2 (IIIA) and/or crystalline TiO2 (IIIB) to the soln. and stirring. The coatings are produced by applying (I) as a thin layer, e.g. 0.1-10 microns, to a glass, metal, ceramic or plastics substrate, e.g. by spreading, spraying, or printing, and hardening at 100 deg C pref. within 5 min. in a hot air stream.