FUSION FORMABLE ALKALI-FREE INTERMEDIATE THERMAL EXPANSION COEFFICIENT GLASS

摘要

A compositional range of high strain point and/or intermediate expansion coefficient alkali metal free 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 CdTe or CIGS photovoltaic devices or crystalline silicon wafer devices. These glasses can be characterized as having strain points >= 600oC, thermal expansion coefficient of from 35 to 50 x 10-7/oC.