| abstract |
A family of glasses due to the ternary structure of SiO 2 -Al 2 O 3 -P 2 O 5 exhibits high strain points, transparency and low coefficient of thermal expansion. The glass contains 55 to 80 mol% SiO 2 , 12 to 30 mol% Al 2 O 3 and 2 to 15 mol% P 2 O 5 , expressed in mole percent and calculated from a glass batch on an oxide basis. |