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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 >The stability of the Ravenscroft's glass. Influence of the composition and the environment
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The stability of the Ravenscroft's glass. Influence of the composition and the environment

机译：拉维斯克罗夫特玻璃的稳定性。 组成与环境的影响

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摘要

George Ravenscroft designed the lead silicate glasses in 17th-century; however, the first pieces produced showed degradation pathologies after few years. This study reproduces one of the glasses produced by George Ravenscroft and analyses its chemical stability in comparison to two other glasses based on the original composition but with the addition of 5 mol % of PbO and CaO, respectively. The three glasses were exposed to an environment of high humidity and different concentrations of formic acid (0, 100 and 300 ppm), which is the main contaminant in display cases and wooden cabinets. The hygroscopic capacity of the glass was analysed by gravimetry, infrared spectroscopy and mu-Raman spectroscopy. The results show that the acidic environment promotes the ion exchange reaction, accelerating the leaching of alkaline ions, which has a great influence on the durability of the glass. The glasses with a higher content of stabilizers presented a greater stability, especially the glass with calcium.
机译：乔治·拉文斯克罗夫特在17世纪设计了铅硅酸盐玻璃；然而，生产的第一批产品在几年后显示出退化病理。本研究复制了George Ravencroft生产的一种玻璃，并分析了其化学稳定性，与其他两种玻璃进行了比较，这两种玻璃基于原始成分，但分别添加了5 mol%的PbO和CaO。这三个玻璃杯暴露在高湿度和不同浓度甲酸（0、100和300 ppm）的环境中，甲酸是陈列柜和木柜中的主要污染物。通过重量分析、红外光谱和穆拉曼光谱分析了玻璃的吸湿能力。结果表明，酸性环境促进了离子交换反应，加速了碱性离子的浸出，这对玻璃的耐久性有很大影响。稳定剂含量较高的玻璃表现出更大的稳定性，尤其是含钙的玻璃。

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