Ecofriendly High NIR Reflectance Ceramic Pigments Based on Rare Earths Compared with Classical Chromophores Prepared by DPC Method

A high NIR reflectance ceramic pigments palette based on rare earths except black (La,Li-SrCuSi4O10 blue wesselsite, Pr-CeO2 red-brown cerianite, Mo-Y2Ce2O7 yellow cerate, Sr4Mn2CuO9 hexagonal perovskite) was compared with the coolest traditional prepared by dry powder coating (DPC) to obtain “core-shell” (Co-willemite blue, Cr-franklinite brown, Ni,Sb-rutile yellow, Co,Cr-spinel black). Adding CaCO3 as a binder, normalized at L* = 85, 55 and 30 for brown blue-black powders, respectively. Rare lack intense absorption bands in range therefore its show higher reflectance, but measurements smaller differences even have an inverse result pigments. The pigmenting capacity stability study different media that of cool earth is lower than DPC classical pigments, case Pr-cerianite pigment.