BK7 Glass Wafer

Density

2,51 g/cm3

Refractive Index (nd)

1,51680

Linear Thermal Coefficient of Expansionα

1. 1.    7,1 x10-6/K (-30°C to +70°C)

2. 2.    8,3 x10-6/K (+20 to +300°C)

Transformation Temperature

557°C

Annealing Point (1013 dPa·s)

557°C

Softening Point(107.6 dPa·s)

719°C