新型无毒铁红粉彩颜料的研制

SYNTHESES OF NUISANCELESS FERRIC OXIDE RED FAMILLE-ROSE PIGMENT

以二氧化硅为包裹相,采用溶胶-凝胶法制备新型无毒铁红粉彩色料,研究了硅溶胶酸碱度、铁源、Si/Fe摩尔比等对色料呈色的影响,并采用XRD、TEM、分光光度计等分析手段对色料进行了表征。结果表明:以氧化铁为着色剂,工艺参数为pH=3,Si/Fe=4.0条件下合成的色料,与基础熔剂按照15∶85的百分比混合后的颜料经彩烤后红度值较高;此外,所得铁红色料具有核壳结构的包裹形态,以氧化铁为核,以含有大量细小SiO2晶粒的SiO2玻璃为壳。

Using SiO2 as cladding materials,The nuisanceless Ferric Oxide Red famille-rose pigment was synthesized by sol-gel technique.The influence of pH of silica sols,iron source and Si/Fe molar ratio on color generation of pigments were investigated.X-ray diffraction（XRD）,transmission electron microscope（TEM） and VIS spectrophotometer were employed to characterize the as-prepared pigments.The results reveal that the package ferric oxide red pigments are of preferable redness value（a＊） after decorating firing when Fe2O3 is used as iron source.The optimized technological parameters are pH value of 3,Si/Fe molar ratio of 4.0 and the basic flux additive amount of 85%.Meanwhile,it was found that a large number of small SiO2 crystals exist in the SiO2 glass cladding layer of package ferric oxide red pigments.