彩色铝粉Fe_2O_3/SiO_2/Al的液相沉积制备与表征  

Preparation and characterization of colored aluminum powder Fe_2O_3/SiO_2/Al by liquid deposition

作　　者：韩凯[1] 张赢超[1] 叶红齐[1] 

机构地区：[1]中南大学化学化工学院,长沙410083

出　　处：《中国有色金属学报》2011年第12期3169-3174,共6页The Chinese Journal of Nonferrous Metals

基　　金：教育部高等学校博士学科点基金(200805330032)

摘　　要：采用分步液相沉积法在片状铝粉表面包覆SiO2与Fe2O3双层薄膜制备了具有金属光泽的彩色铝粉，以彩度与光泽度为主要评价指标，探讨Fe203用量与pH值对铝粉包覆效果的影响，利用原子力显微镜（AFM）、扫描电子显微镜（SEM）和X射线衍射（XRD）等手段对包覆前后的铝粉进行表征。结果表明：当SiO：包覆量为20％（质量分数）时，随着Fe203膜厚的增加，铝粉颜色由浅黄→金黄→红黄过渡，光泽度下降；当m（Fe203）：m（SiO2）：m（A1）=0．75：0．2：1时，铝粉具有良好的彩度与光泽度，铝粉表面粗糙度由5．05nm增大到20．6nm；反应过程pH值对Fe2O3包覆效果有重要影响，pH值宜控制在3．9～4．0；表面活性剂PVP的加入有利于提高Fe20，膜层与Si02和Al基体的结合力，从而提高颜色稳定性。The colored aluminum flake powder with metallic luster was prepared by encapsulating SiO2 and Fe203 double-layer film via step liquid-phase deposition method. Using the chromaticity and gloss as the main targets, the influence of Fe203 amount and pH value on the coating effect was studied. The unencapsulated and encapsulated aluminum powders were characterized by AFM, SEM and XRD. The results show that when the amount of SiO2 is 20% （mass fraction）, with the increase of Fe2O3 amount, the aluminum powder changed colors from pale-yellow to golden-yellow, and then to red-yellow, and the gloss is reduced. Under the condition of m（Fe2O3）：m（SiO2）：m（A1）= 0.75：0.2：1, the encapsulated sample has good chromaticity and gloss synchronously, and the surface roughness of the aluminum powder increases from 5.05 nm to 20.6 nm. Furthermore, pH value should be controlled between 3.9 to 4.0. The addition of PVP is helpful to improve the color stability property of the aluminum powder, the Fe2O3 film is firmly combined with SiO2 and A1.

关 键 词：片状铝粉 表面包覆 氧化铁 彩度 光泽度 

分 类 号：TQ050.4[化学工程] TQ624