کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1486641 1510561 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reactions between sol–gel coatings and some technical glass substrates during consolidation
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Reactions between sol–gel coatings and some technical glass substrates during consolidation
چکیده انگلیسی

SiO2 and Na2O–SiO2 coatings have been applied on float glass and other technical glass substrates by a sol–gel dip-coating process. After drying and baking these films at temperatures up to 500 °C and for times up to 1020 min, the in-depth profiles of the different constituents were measured by secondary neutral mass spectrometry (SNMS). Sn, Al, and Si turned out to be immobile, whereas a diffusion coefficient of ≈10−17 cm2/s could be evaluated for Mg at 500 °C for the transport from float glass into the films. Ca diffused a little faster, however, especially for the Na2O–SiO2 films a saddle point and finally a peak occurred in the interface region. This interface peak was even stronger for Na, showing quite anomalous profiles. The mechanism of this peak formation is explained mainly as an up-hill diffusion process. According to this model at the interface non-bridging –O− ions are formed, whose electroneutrality has to be maintained by mobile cations like Na+ and Ca2+, even diffusing against their own concentration gradient. The other glass substrates, two borofloat glasses and an alkali-poor display glass showed similar but less pronounced effects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 351, Issues 43–45, 1 November 2005, Pages 3562–3569
نویسندگان
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