Co-doped willemite ceramic pigments: technological behavior, crystal structure and optical properties
- Ozel, Emel
- Yurdakul, Hilmi
- Turan, Servet
- Ardit, Matteo
- Cruciani, Giuseppe
- Dondi, Michele
DOIAbstract
Cobalt-doped willemite is a promising blue ceramic pigment, but some important aspects concerning crystal structure, optical properties and technological behavior are still undisclosed. In order to get new insight on these features, willemite pigments (Zn2-xCoxSiO4, 0<x<0.3) were synthesized by the ceramic route and characterized from the structural (XRPD with Rietveld refinement), optical (DRS and colorimetry), microstructural (SEM, STEM, TEM, EDX, EELS) and technological (simulation of the ceramic process) viewpoints. The incorporation of cobalt in the willemite lattice, taking preferentially place in the Zn1 tetrahedral site, induces an increase of unit cell parameters, metal-oxygen distances, and inter-tetrahedral tilting. It causes shi...
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