Properties and transmission
-
Borosilicate glass
Thermal properties
Linear Thermal Expansion
7.2 x 10
-6
K
-1
8.3 x 10
-6
/°C (20° a 3000°C)
Temp. of Trasformation
557°C
Mechanical properties
Young Modulus
72.9 kN/mm
2
Torsion Modulus
30.1 kN/mm
2
Knoop Hardness HK
100
590
Poisson constant
0.208
Electrical properties
Di-electric constant
6.7 @ 1 MHz
Optical properties
Transmission
see graph below
Transmission Curve
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