KİR TUTMAYAN SERAMİK DUVAR KAROLARI

Wettability of a solid surface is controlled by both surface chemical composition and surface topology.  In order to obtain super hydrophobic surfaces the contact angle with water between the surfaces must be more than 150°. To reach super-hydrophobicity, a combination of surface roughness and low surface energy is required. In this study, surface of ceramic wall tiles produced by single firing process was coated with nano/sub-micron alumina-silicate powder. Super-hydrophobic surfaces are produced via two main approaches. One is to introduce roughness onto a hydrophobic surface. In this study, we focused on creating nano/sub-micron roughness on ceramic tile surface by using inorganic materials, followed by coating by alumina- silicate powder on the roughness surface. A coating of nano/sub-micron whisker-like mullite crystals on ceramic surfaces were produced by high energy ball milling of alumina-silica mixtures (600 rpm, 2 h). After milling, the mixture was coated with a pistol to the surface. Samples fired at 1000, 1100, 1125 and 1150°C, respectively. Surfaces of Fired samples were coated with a polymer and dried at 100°C for 1 h. It was observed that as the firing temperature increased, contact angle increased.  Keywords: Wall tile , super-hydrophobic surface, mullite, microstructure, sintering