Cooling Performance and Formation Mechanism of Photonic Micro-Nanostructures in Phosphate Glaze Melts
In this paper,Ca3(PO4)2 was used as a variable in a SiO2-Al2O3-CaO-MgO-Na2O-ZnO multi-component glaze system using instruments such as whiteness meter,UV-vis,XRD,Raman,and SEM.It explores the impact of different Ca3(PO4)2 additions on the amorphous photonic crystal structure,glaze color,and glaze cooling performance.The results showed that the introduction of calcium phosphate can significantly promote phase separation in the glaze layer and induce changes in its microstructure.When a small amount of calcium phosphate was introduced,the glaze structure changed from granular to a short-range ordered 3D network diamond structure,resulting in a shift towards the blue color range.As the amount of calcium phosphate increased,the phase separation led to the continuous enlargement of the silica-rich phase size within the three-dimensional network structure.Under the influence of this structure and the refractive indices of the two phases,the glaze surface exhibits high reflectance,resulting in a milky white effect.Excessive addition of calcium phosphate leads to the precipitation of a large number of rod-shaped phosphate crystals,which destroy the glaze layer structure and surface effects.
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