Description of High Quality Pyrex Borosilicate Glass Tubes for Blowing

Borosilicate glass is one of transparent colorless glass,through wavelength is between 300 nm to 2500 nm,transmissivity is more than 90%. Coefficient of expansion is 3.3. It can acid proof and alkali, the high temperature resistant is about 450℃. If course handling,the temperature resistant can reach 550℃ or so. Apply to lighting fixture,chemical industry ,electron,high temperature equipment and so on .

Technical Date

Density	2.5 g/cm3
Hardness	>7
Tensile strength	4.8x107pa(N/M2)
Compressive strength	40-90MPa
Modulus of elasticity	63·103N·mm-2
Poisson's ratio	0.18
Coefficient of thermal expansion	(0-300) 3.3±0.1×10-6K-1
Thermal conductivity	1.2W·m-1·k-1
Softening point	820±10°C
Annealing point	560°C
Strain point	516±10°C
Electrical resistivity	>1018 Ωm
Dielectric constant	4.6 1 MHz, 25

Application

1. Household electrical appliance (panel for oven and fireplace, microwave tray etc.);