稀土钼酸盐的光环境诱导变色效应及色度学分析

Allochroic Effect and Chromaticity Analysis of Rare-Earth Molybdate Pigment

稀土钼酸盐材料的光环境诱导变色性能与其自身吸收反射特性与光源功率分布相关。基于色度学原理,对比国际照明委员会规定的4种标准光源(即D65、A、F2与F11光源)的功率分布曲线,构建了不同光源间的差异函数,并分析可知此类材料一般在功率分布差异显著的光源间会呈现明显色差,当此类材料的反射率极小值位于光源差异函数的尖锐峰附近时,在相应光源间呈现较大色差,反之则色差较小。根据稀土离子的特征吸收谱线,筛选出具有光环境诱导变色效应的稀土元素,并实验验证了高温固相法所合成稀土钼酸盐变色材料。

Allochroic effect of rare-earth molybdate materials is related to the reflection spectrum and the power distribution of illuminants.Based on the chromaticity,the power distribution of four standard illuminants(i.e.,D65,A,F2 and F11)were compared for constructing the illuminant difference functions(IDF),indicating that a significant allochroic effect of the materials usually occurs between two illuminants with a great difference in the power distributions.The allochroic effect appears when the minimum reflectivity is near asharp peak of IDF,while the color difference is small asthe minimum reflectivity isfar away from the sharp peak.Rare-earth ions with a potential allochroic effect were selected based on the atomic characteristic absorption spectra,and rare-earth molybdate materials synthesized via solid-state reaction were used for the related experimental validation.