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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 >Precipitation of nanometer-sized SnO2 crystals and Sn depth profile in heat-treated float glass
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Precipitation of nanometer-sized SnO2 crystals and Sn depth profile in heat-treated float glass

机译：热处理浮法玻璃中纳米级SnO2晶体的沉淀和Sn深度分布

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The effect of oxygen diffusion from the atmosphere on tin depth profile in the bottom face of a soda-lime-silica float glass at temperatures above T, was investigated. The heat treatment was performed in O-18(2)/N-2 and argon (Ar) atmospheres. The significant diffusion of tin to the surface was observed for the glass heat-treated in O-18(2)/N-2 atmosphere, resulting in-the formation of a tin-enriched layer near the surface region. It was found that the tin was supplied from the region shallower than the 'hump' which is commonly observed in the tin profile of a commercial soda-lime-silica float glass. No significant change in the tin depth profile was observed for the glass heat-treated in Ar atmosphere. These results indicate that O-18 diffusion into the glass, which causes the change in chemical state of tin from Sn2+ to Sn4+ induces the significant diffusion of tin. Furthermore, the precipitation of crystalline SnO2 particles with a diameter of similar to1 nm was clearly recognized in the tin-enriched layer. This fact indicates that a phase separation was induced by the oxygen diffusion into the glass. Consequently, Sn2+ may be supplied to the surface in order to compensate for the marked decrease in Sn2+ concentration in the glass system. The significant diffusion of tin to the surface was suppressed by increasing the iron content in the glass. This suppression was ascribed to the increase in Sn4+ concentration as a result of the redox reaction between tin and iron because the diffusion coefficient of Sn4+ is much smaller than that of Sn2+. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 15]
机译：研究了在高于T的温度下，氧气从大气中扩散对钠钙硅浮法玻璃底面中锡深度分布的影响。热处理在O-18（2）/ N-2和氩（Ar）气氛中进行。对于在O-18（2）/ N-2气氛中进行了热处理的玻璃，观察到锡向表面的大量扩散，从而在表面区域附近形成了富锡层。已发现，锡的供应区域比“钠峰”要浅，在商业钠钙硅浮法玻璃的锡型材中通常观察到这种峰。对于在Ar气氛中进行了热处理的玻璃，未观察到锡深度分布的显着变化。这些结果表明，O-18扩散到玻璃中会导致锡的化学状态从Sn2 +变为Sn4 +，从而引起锡的显着扩散。此外，在富锡层中清楚地发现了直径接近1 nm的结晶SnO2颗粒的沉淀。该事实表明，由于氧扩散到玻璃中而引起相分离。因此，可以将Sn2 +供给至表面，以补偿玻璃系统中Sn2 +浓度的明显下降。通过增加玻璃中的铁含量，可以抑制锡向表面的明显扩散。这种抑制归因于锡和铁之间的氧化还原反应导致的Sn4 +浓度的增加，因为Sn4 +的扩散系数远小于Sn2 +的扩散系数。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：15]

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