铈钛着色玻璃的可见光谱研究

THE STUDY ON VISIBLE SPECTRUM FOR GLASS CONTAINING CERIA AND TITANIA

在普通器皿玻璃的组成中,引入不同量的氧化铈、氧化钛作为着色剂,制得了淡黄、深黄、橙黄直至红棕等一系列色彩的玻璃.对这些玻璃试样作了波长自350nm至800nm的可见光透射率的测试,并对它们作了色度色差分析,标记在CIE色图上.根据硅酸盐热力学原理和对光谱曲线的分析,作者认为,由于Ti^(4+),Ti^(3+),Ce^(4+)和Ce^(3+)离子间的氧化还原反应和离子间相互影响,使玻璃的紫外吸收极限移到可见光区域内,从而使玻璃着色.实验还表明,随着着色剂氧化钛与氧化铈之比的增加,玻璃颜色的主波长和饱和度也随之以线性关系增加.作者应用配位场理论,对这些现象进行了解释.

In the present research, the glasses with a series of beautiful colours, from yellowish, yellow, orange to reddish brown, were made by introducing different amounts of ceria and titania into the common composition of glassware. The transmissivities of the glass samples were measured in the visible wavelength range from 350 to 800nm and the positions of these glasses on the CIE colour chart were deduced from the results of colour measuring system. According to the thermodynamic principle and the analysis for these spectra, the authors suggested that the redox reaction between Ti^(4+), Ti^(3+), Ce^(4+) and Ce^(3+) ions in the glasses and the influence between them were responsible for shifting ultraviolet absorption cut-off to the visible wavelength range, and thus, the glass was coloured. It was shown in this experiment that the major wavelength and colour saturation increase linearly with the increase of the ratio of titania to ceria. The authors also interpreted these phenomena by applying the ligand field theory.