摘要
采用液相沉淀法,制备了在片状铝粉表面包覆Cr2O3的复合粉体颜料,利用XRD、SEM、UV/VIS/NIR分光光度计、FTIR红外光谱仪等方法对颜料相结构、形貌、光谱及红外反射特性等进行了测试表征。结果表明,Cr2O3包覆层对光谱反射特性的影响随波长变化而异,波长越短,包覆前后反射率的变化越大。当Cr3＋：Al摩尔比为0.2：1.0时,Al/Cr2O3复合颜料在可见光波段的反射率下降接近50%,颜色明度参数L＊降低15,而8~14μm波段红外反射率下降不到10%。分析表明,包覆层对不同波长辐射的吸收系数以及表面粗糙度的差异导致了上述结果。该复合颜料对于低明度和光泽度的低红外发射率涂层设计有重要研究价值。
The composite pigments were prepared by co-precipitation coated Cr2O3 on the surface of flake aluminum powders. Phase structure, surface morphology and reflectance spectra of the composite pigment were characterized by XRD, FE-SEM, UV/VIS/NIR spectroscopy and Fourier transform infrared spectrometer. The result shows that the influence of cover treatment with Cr2O3 on the reflectance spectra at various radiation wavelengths is different. The shorter the wavelength is, the stronger the influence is. When the molar ratio of Cr3＋to A1 is 0.2：1.0, compared with the uncoated flake aluminum powders, its average reflectance of visible spectrum and brightness （L＊） drop to 50% and 15, respectively. However, the infrared emissivity of 8-14 pm waveband increases less than 10%. It mainly ascribes to the difference of surface roughness and absorption coefficient for different radiation wavelengths. Thus, the composite particles play a vital role in designing the low infrared emissivity coating.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第5期545-550,共6页
Journal of Inorganic Materials
基金
西华大学特种材料及制备省级重点实验室开放研究基金(SZJJ2009-001)
装备预先研究项目(51310030103)~~
作者简介
袁乐（1985-），男，博士研究生．E—mail：yuanle．cn@gmail．com
通讯作者：翁小龙，副研究员．E-mail：wengx159@163．com
