Optical Properties of Au-Pt and Au-Pt-In Alloys
Optical Properties of Au-Pt and Au-Pt-In Alloys
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Au-Pt 和 Au-Pt-In 合金的光学性能
DOI：
10.1007/bf03214825
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发表时间：
2001
期刊：
影响因子：
2.2
通讯作者：
Y. Takuma
中科院分区：
文献类型：
--
作者：
T. Shiraishi;K. Hisatsune;Yasuhiro Tanaka;E. Miura;Y. Takuma
用计算机控制的分光光度计研究了金中加入铂和金铂合金中加入铟对它们光学性质的影响。收集来自抛光样品的入射CIE标准光源D 65的光谱反射率数据，作为从360至740 nm的10 nm间隔处的波长的函数。在CIE 1976 L *a*B* 颜色空间中，确定了三个坐标，L*（亮度），a*（红-绿），B*（黄-蓝），以量化实验的二元Au-Pt和三元Au-Pt-In合金的颜色。在纯金的光谱反射率-波长曲线中，在520 nm（约2.4 eV）附近的显著阶跃（这是金的深黄色的原因）随着铂的加入变得不那么明显。发现铂的脱色效果是由于这种现象。在Au-10 at% Pt合金中添加高达约4 at%的铟，增加了两个色度指数，即a* 和b * 值，使合金具有金色色调：这种效果是由可见光谱的长波长范围内反射率的轻微增加和短波长范围内反射率的轻微降低引起的。
The effects of platinum addition to gold and indium addition to a gold-platinum alloy on their optical properties were investigated using a computer-controlled spectrophotometer. Spectral reflectance data from a polished sample for the incident CIE standard illuminant D65 was collected as a function of the wavelength at 10 nm intervals from 360 to 740 nm. Three coordinates,L* (lightness),a* (red-green),b* (yellow-blue), in the CIE 1976L*a*b*colour space, were determined to quantify the colour of experimental binary Au-Pt and ternary Au-Pt-In alloys. p ]The pronounced step near 520 nm (approximately 2.4 eV) in the spectral reflectance-wavelength curve for pure gold, which is responsible for the rich yellow colour of gold, became less pronounced with the addition of platinum. The decoloring effect of platinum was found to be due to this phenomenon. The addition of indium of up to ca 4 at% to a Au-10 at% Pt alloy increased both chromaticity indices, ie,a* andb* values, giving a gold tinge to the alloy: this effect was brought about by both the slight increase in reflectance in the long-wavelength range and the slight decrease in reflectance in the short-wavelength range of the visible spectrum.