Synthesis and Coloring Mechanism of Metallic Glaze in R₂O-RO-Al₂O₃-SiO₂-P₂O₅ System

【摘要】 A copper-red and silver-white metallic glaze of R₂O-RO-Al₂O₃-SiO₂-P₂O₅ system was synthesized by adjusting the firing temperature and glaze components.The coloration mechanism of the metallic glaze was revealed via investigation of the microstructure of the glaze.Our research reveals that the metallic glaze with different colors is mainly due to the amount of Fe₂O₃.The metallic glaze shows a silver-white luster due to a structural color of α-Fe₂O₃ crystals with a good orientation when the sample contains 0.093 9 mol of Fe₂O₃,maintaining temperatures at 1 150 ℃ for 0.5 h.The metallic glaze is copper-red which is dominated by the coupling of chemical and structural color of α-Fe₂O₃ crystals when the sample contains 0.078 3 mol of Fe₂O₃.After testing the amount of SiO₂,we find that 4.049 9 mol is the optimal amount to form the ceramic network,and 0.27 mol AlPO₄ is the best amount to promote phase separation.更多还原

【Abstract】 A copper-red and silver-white metallic glaze of R₂O-RO-Al₂O₃-SiO₂-P₂O₅ system was synthesized by adjusting the firing temperature and glaze components.The coloration mechanism of the metallic glaze was revealed via investigation of the microstructure of the glaze.Our research reveals that the metallic glaze with different colors is mainly due to the amount of Fe₂O₃.The metallic glaze shows a silver-white luster due to a structural color of α-Fe₂O₃ crystals with a good orientation when the sample contains 0.093 9 mol of Fe₂O₃,maintaining temperatures at 1 150 ℃ for 0.5 h.The metallic glaze is copper-red which is dominated by the coupling of chemical and structural color of α-Fe₂O₃ crystals when the sample contains 0.078 3 mol of Fe₂O₃.After testing the amount of SiO₂,we find that 4.049 9 mol is the optimal amount to form the ceramic network,and 0.27 mol AlPO₄ is the best amount to promote phase separation.更多还原