Fusion formable sodium free glass
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United States of America Patent
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Jun 21, 2016
Grant Date -
Dec 2, 2010
app pub date -
May 27, 2010
filing date -
May 29, 2009
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Abstract
A compositional range of fusion-formable, high strain point sodium free, silicate, aluminosilicate and boroaluminosilicate glasses are described herein. The glasses can be used as substrates for photovoltaic devices, for example, thin film photovoltaic devices such as CIGS photovoltaic devices. These glasses can be characterized as having strain points≧540° C., thermal expansion coefficient of from 6.5 to 10.5 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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