Fusion formable silica and sodium containing glasses
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United States of America Patent
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Dec 27, 2016
Grant Date -
Jun 5, 2014
app pub date -
Feb 10, 2014
filing date -
Jul 24, 2009
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Abstract
Sodium containing aluminosilicate and boroaluminosilicate glasses are described herein. The glasses can be used as substrates or superstrates for photovoltaic devices, for example, thin film photovoltaic devices such as CIGS photovoltaic devices. These glasses can be characterized as having strain points ≧535° C., for example, ≧570° C., thermal expansion coefficients of from 8 to 9 ppm/° C., as well as liquidus viscosities in excess of 50,000 poise. As such they are ideally suited for being formed into sheet by the fusion process.
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