MOLDED CERAMIC ARTICLE WITH PHOTO-CATALYTIC COAT AND METHOD OF MANUFACTURE OF SUCH ARTICLE Russian patent published in 2008 - IPC C04B41/87 B01J35/10 

FIELD: production of ceramic articles, such as tiles, brick, clinker brick or ceramics for face walls with self-cleaning surfaces.

SUBSTANCE: ceramic article is characterized by porous oxido-ceramic coat which is photocatalytically active and contains TiO₂; its specific surface ranges from 25 m²/g to 200 m²/g. TiO₂ is obtained by flame hydrolysis of TiCl₄ in form of highly dispersed powder. Thickness of layer of coat ranges from 50 nm to 50 mcm. Layer with cambers may be located between surface of material of base and photocatalytically active coat. It is preferably to have superhydrophobic surface of coat. Method of making such molded ceramic article includes preparation of suspension of photocatalytically active oxido-ceramic powder, application of this suspension on base and hardening of layer thus obtained by means of drying or roasting. For obtaining superhydrophobic surface, polysiloxane solution is added to starting suspension.

EFFECT: enhanced self-cleaning ability of articles.

30 cl