What is borosilicate glass 3.3?
Publish Time: 2020-09-04 Origin: Site
Borosilicate Glass is one of transparent colourless glass, through wavelength is between 300 nm to 2500 nm, transmissivity is more than 90%. Coefficient of thermal expansion is 3.3. It can acidproof and alkalifast ,the high temperature resistant is about 400℃C.If course handling , the high temperature resistant can reach 550°C or so. Additionally, borosilicate glass 3.3 differs from other materials of construction used for process plant equipment because of its very low thermal expansion coefficient
Apply to lighting fixture , chemical industryelectron, high temperature equipment and so on |
Borosilicate Glass Sheet Technique Index Sign:
1.Surface quantity:0/0,40/20 80/50
2.Surface accuracy:1/10 into,1/4 into2 into
3.Thickness business trip:±0.02mm
4.Center deviation:5Arc second1Arc Minute
5.Process the scope:The thickness is the most thin to attain 0.5mm
6.Coated
7.Tempered
Product Name | thickness 0.7-80mm Heat Resistance High Borosilicate Glass 3.3 |
Temperature resistance | 650℃ |
Color | transparent clear |
Transmittance | 92% |
Density | 2.23 g/cm3 |
Morris hardness | 7 |
Composition content | Boron: 12.5~13.5%, silicon: 78~80% |
Shape | Round, Square with holes, uncommon shape etc. |
Modulus of elasticity | 63·103N·mm-2 |
Poisson's ratio | 0.18 |
Tensile strength | 4.8x107pa(N/M2) |
Compressive strength | (0-300) 3.3±0.1×10-6K-1 |
Thermal conductivity | 1.2W·m-1·k-1 |
Annealing point | 560°C |
Softening point | 820±10°C |
Electrical resistivity | >1018 Ωm |
Dielectric constant | 4.6 1 MHz, 25 |
Water resistance | ISO719 HGB Level 1 |
Acid resistance | ISO195 HGB Level 1 |
Alkali resistance | ISO695 HGB Level 2 |
Applications
Household electrical appliance such as oven glass and microwave glass | Jumbo power of Light such as spotlight glass and floodlight glass | Optical filter of Fine instruments | Safety protection, such as bullet proof glass |
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