float borosilicate glass

Product feature:

1. low thermal expansion coefficient

2. high working temperature

3. high thermal shock resistance.

4. Dimensions  1150×1700mm  1150*850 （Maximum1700×2000mm）

5. 2--20mm

Mechanical Performance

Density   ρ               2.23+/-0.02g/cm³

Thermodynamic Performance

Thermal expansion coefficient       (0-300°C ) 3.3+/-0.1x10^-6K^-1

Softening point         820+/-10°C

Strain point            516+/-10°C

Caloricity              (20-100°C) 0.82KJ x (kgxK)^-1

Thermal coefficient      1.2WxmxK^-1

Thermal shock resistance 180K

Strengthening type       300K

Identical temperature difference 100K

Strengthening type  300 K

Maximum working temperature

Short time(<10h): 500 °C  

 Long time(>10h): 450°C 

 Chemical Performance

Water resistance    ISO719/DIN12111 HGB1/ISO720 HGA1

Acid resistance     ISO1776/DIN12116 1

Alkali resistance    ISO695/DIN52322 A2 

 Optical Property

Refractive index Nd:    1.47384

Transmittance spectrum curve

Electrical Property

Specific resistance lgN    8.0Ω xcm at 250°C

Dielectric dissipation fraction tanσ (1 megacycle at 20):   38x10^-4

Dielectric constant    ε=4.7