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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Sol-gel deposition of silica films on silicate glasses: Influence of the presence of lead in the glass or in precursor solutions
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Sol-gel deposition of silica films on silicate glasses: Influence of the presence of lead in the glass or in precursor solutions

机译：硅膜在硅酸盐玻璃上的溶胶-凝胶沉积：玻璃或前体溶液中铅的存在的影响

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摘要

Many lead silicate historical glasses suffer degradation phenomena often observed as color changes and iridescence caused by lead ions leaching from the outer layers of the glass. In order to repair and to prevent these phenomena, glasses with large amounts of lead (6.7 and 14.3 at.% of lead) have been coated with silica films at neutral pH by dipping them in a precursor solution of TEOS (tetraethyl orthosilicate), ethyl alcohol and deionized water without any other acid or basic catalyst. Experiments with long dipping times (24 h) and temperatures around 20 degrees C have been performed to evaluate the role of lead ions of the glass as a catalyst. Silica films of very good quality and optical transparency have been also obtained on lead-free, soda-lime glasses by adding catalytic amounts of Pb(NO3)(2) instead of HCl to the precursor solution. The films have been characterized by optical microscopy, AFM (Atomic Force Microscopy), XPS (X-ray Photoelectron Spectroscopy) and SIMS (Secondary Ion Mass Spectrometry). (c) 2005 Elsevier B.V. All rights reserved.
机译：许多硅酸铅历史玻璃遭受降解现象的影响，通常是由于铅离子从玻璃外层浸出引起的颜色变化和虹彩。为了修复和防止这些现象，将大量铅（铅含量分别为6.7和14.3 at）的玻璃浸入TEOS（原硅酸四乙酯），乙基酒精和去离子水，无需任何其他酸或碱性催化剂。已经进行了长时间浸泡（24小时）和20摄氏度左右温度的实验，以评估玻璃中铅离子作为催化剂的作用。通过在前体溶液中添加催化量的Pb（NO3）（2）而不是HCl，也可以在无铅钠钙玻璃上获得质量和光学透明性非常好的二氧化硅膜。通过光学显微镜，AFM（原子力显微镜），XPS（X射线光电子能谱）和SIMS（二次离子质谱）对薄膜进行了表征。 （c）2005 Elsevier B.V.保留所有权利。

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