Preparation and characterization of inorganic colored coating layers on lamellar mica-titania substrate

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• 作者：Min Ren ; Hengbo Yin ; ^{yin@ujs.edu.cn} ; Chaoqun Ge ; Jichuan Huo ; Xian Li ; Aili Wang ; Longbao Yu ; Tingshun Jiang ; Zhanao Wu
• 关键词：Mica-titania ; Inorganic coating layer ; Composite ; Pigmentary property
• 刊名：Applied Surface Science
• 出版年：2012
• 出版时间：15 January 2012
• 年：2012
• 卷：258
• 期：7
• 页码：2667-2673
• 全文大小：1454 K

文摘

The inorganic colored composite pigments, such as Fe₂O₃-, Bi₄Ti₃O₁₂-, and CoAl₂O₄-coated mica-titania composites, were prepared by hydrolysis of FeCl₃, Bi(NO₃)₃, and Co(NO₃)₂/Al(NO₃)₃ in the presence of mica-titania substrate and calcination at different temperatures. The inorganic coating layers on mica-titania substrate surfaces were explored by X-ray diffraction, scanning electron microscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy. Dense and uniform Fe₂O₃ coating layers were formed on the surfaces of mica-titania substrates. At lower Bi₂O₃ loading, Bi₄Ti₃O₁₂ nanoparticles were formed on the surfaces of mica-titania substrates. But at higher Bi₂O₃ loading, Bi₄Ti₃O₁₂ nanosheets were formed and perpendicularly oriented to the substrate surfaces. CoAl₂O₄ nanosheets were formed on the mica-titania substrates and perpendicularly oriented to the substrate surfaces. The pigmentary performances of the inorganic composite pigments were analyzed by CIE, indicating that red, yellow, and blue colored pigments were achieved by coating Fe₂O₃, Bi₄Ti₃O₁₂, and CoAl₂O₄ on mica-titania substrate surfaces, respectively. The pigmentary performances of the inorganic composite pigments were significantly affected by the morphology and loading of inorganic coating layers.