Specifications
pyrex glass:
low thermal expansion
92%light transmission
high thermal shock resis
printing available
pyrex glass:
Thermal properties
Maxiimun working temperature:
Short-term(10h) 500
Long-term(10h) 450
Viscosity of Glasses
Working point 104dpas 1270
Softening point 107.6dpas 820
Annealing point 1013dpas 560
Strain point 1014.5dpas 518
Transformation Temperature(Tg0 525
RTG
1 hour 110K
1-100hour 90K
100hour 80K
Glass Thickness RTS
3.8mm 175K
5.0-5.5mm 160K
6.5-12.0mm 150K
Technical Properties
Density25 2.3g/cm3
Youngs Modulus E 63kn/mm3 JC/T678-1997
Poissons Ratio u 0.18 JC/T678-1997
Bending strength 59.3MPa JC/T678-1997
Hardness H 6 GB/T16534-1996
Thermal Properties
Coefficient of Linear Thermal α 20-300 3.3*10-6k-1
Thermal conductivity λ(90) 1.2W*(M*K)-1
Specific Heat Capacity Cp(20-100) 0.83K1*(kg*k)-1
Chemical Resistance
Hydrolytic resistance according ISO 719/DIN 12 111 HGB 1
According ISO 720 HGA 1
Acid resistance according ISO 1776/DIN 12 116 1
Alkali resistance according ISO 695/DIN 52 322 A 2
Optical Properties
Wavelength λ(nm) 435.8 479.9 546.1 589.3 643.8 656.3
Index of Refraction n 1.48023 1.47685(nF) 1.47326(ne) 1.47145 1.46975(nc) 1.46925
Refractive index nd(λ587.6nm) 1.47178
Panel size 1200*750mm 2000*800mm we will be happy to provide other sizes upon request
Test method: Plates of approximately 20*20cm2 are heated in an oven with recirculated air and then doused in the center with 50ml of room temperature water,at which5%of the samples suffer breakage. The plates are abraded before heating with 220 grit sandpa-per to simulate typical surface condition during practical use .
