波克棋牌

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Pyrolitic glass is glass used in ovens with pyrolitic function. This characteristics of this glass is that it is more resistant thermal shocks in comparison with normal glasses. At the moment borosilicate glass is used as pyrolitic glass.
波克棋牌 Borosilicate glass is a type of glass of which the main ingredients for the formation of glass are silica and boron axide.

 

The physical properties are as follows:

Silicon content More than 80%
Strain temperature 520 ℃
Annealing temperature 560 ℃
Softening temperature 820 ℃
Refractive index 1.47
Light transmittance (2 mm) 92 %
Elastic Modulus 76KNmm - 2
tensile strength 40- 120Nmm - 2
Glass stress optical constant 3.8 * 10-6 square millimeters / no
Processing temperature (104dpas) 1220 ℃
Linear expansion coefficient (20-300 °C) 3.3 * 10-6 K - 1
Density (20 °C) 2.23gcm - 1
Specific heat 0.9jg - 1K - 1
Thermal conductivity 1.2Wm - 1K - 1
Water resistance (International Organization for Standardization 719) Level 1
Acid resistance (International Organization for Standardization 195) Level 1
Alkali resistance (International Organization for Standardization 695) Level 2
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