セラミックタイルの炭素被覆(2)

Abstract

Carbon coating of ceramic tiles was successfully carried out by placing the sample tile on the powder of carbon precursor, poly(ethylene terephthalate) (PET). Even the upper surface of the tile, which did not touch with carbon precursor directly, was able to be coated by carbon when about 0.01 g of PET per unit physical surface area of the tile was used. In order to coat the upper surface of the tile, it was required to be heated above 700℃ in inert atmosphere. The color of the surface after carbon coating was characterized by using L^*, a^* and b^* (CIELAB). The addition of Fe_2O_3 was found to reduce the L^* value of the lower surface mainly due to the formation of carbon black like particles.