掺杂氧化铬颜料的红外反射特性研究  

Near Infrared Reflectance of the Doped Cr_2O_3 Pigment

作　　者：张捷[1,2] 魏子栋[1,2] 王春辉[3] 卞鹏[3] 翁小龙[3] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,化学化工学院,重庆400044 [2]重庆大学材料科学与工程学院,重庆400044 [3]电子科技大学电子薄膜与集成器件国家重点实验室,微电子与固体电子学院,成都610054

出　　处：《无机材料学报》2010年第12期1303-1306,共4页Journal of Inorganic Materials

基　　金：国家自然科学基金(60877062)~~

摘　　要：采用固相合成工艺,制备了铁掺杂、钛掺杂及铝/钛二元掺杂三类Cr_2O_3颜料,利用XRD、紫外/可见/近红外分光光度计、Color CIE色度分析软件等方法对颜料物相结构、可见/近红外反射率、颜色参数等进行了测试和表征,初步探讨了Cr_2O_3颜料结构与近红外反射率、颜色之间的相互关联.结果表明,所有样品均呈单相刚玉结构,但结晶强度和晶粒大小随掺杂元素有所差异;相比未掺杂Cr_2O_3颜料,掺铁样品的近红外反射率出现下降,而掺钛Cr_2O_3颜料的反射率则明显提高,其中铝/钛二元掺杂样品在Al(OH)_3含量3.4wt%、TiO_2含量1.07wt%时,实现700～2500nm波段平均反射率87%,2500nm处最大反射率99%.掺钛Cr_2O_3材料近红外波段反射率的显著增加,主要归因于掺钛Cr_2O_3晶粒尺寸的增大以及Cr^(3+)局域电子环境的改变.Fe, Ti and Al-Ti binary-doped Cr2O3 pigments were prepared by solid-phase synthesis process. The phase structure, visible / near-infrared reflectance （NIR）, color parameters were tested and characterized by X-ray diffraction （XRD）, UV/VIS/NIR spectroscopy, Color CIE Chromaticity analysis software. The correlation between NIR reflectance, color and pigment structure features of doped Cr2O3 pigments was initially discussed. The results showed that all doped Cr2O3 had a single-phase corundum structure. However their grain sizes varied with doped elements relative to the undoped Cr2O3. It was found that the NIR of doped Cr2O3 decreased with adulteration of Fe but increased significantly with adulteration of Ti. For AI/Ti binary-doped Cr2O3 pigment with composition of 3.4wt% Al（OH）3 and 1.07wt% TiO2, the average reflectance in the wavelengths ranging from 700-2500 nm and maximum reflectance at 2500nm were 87.5% and 99%, respectively. The significant NIR enhancement of Ti-doped Cr2O3 was attributed to its larger grain size and change of Cr^3＋ local electronic environment.

关 键 词：CR2O3 颜料 掺杂 近红外反射率 

分 类 号：TQ174[化学工程—陶瓷工业]