Design Of A Bi-Functional [alpha]-Fe2O3/Zn2SiO4:Mn2+ By Layer-By-Layer Assembly Method

This work describes the design of bi-functional [α]-Fe[2]O[3]/Zn[2]SiO[4]:Mn[2+] using a two-step coating process. We propose a combination of pigments ([α]-Fe[2]O[3]) and phosphor (Zn[2]SiO[4]:Mn[2+]) glaze which is assembled using a layer-by-layer method. A silica-coated [α]-Fe[2]O[3] pigment was obtained by a sol-gel method and a Zn[2+] precursor was then added to the silica-coated [α]-Fe[2]O[3] to create a ZnO layer. Finally, the Zn[2]SiO[4]:Mn[2+] layer was prepared with the addition of Mn[2+] ions to serve as a phosphor precursor in the multi-coated [α]-Fe[2]O[3], followed by annealing at a temperature above 1000°C. Details of the phase structure, color and optical properties of the multi-functional [α]-Fe[2]O[3]/Zn[2]SiO[4]:Mn[2+] were characterized by transmission electron microscopy and X-ray diffraction analyses.