Borosilicate Float Glass 3.3
■ Application
Borosilicate 3.3 serves as a material of truly functional and wide applications:
◎ Household electrical appliance (Panel for oven and fireplace, microwave tray etc.);
◎ Environmental engineering and chemical engineering (Lining layer of repellence, autoclave of chemical reaction and safety spectacles);
◎ Lighting (Spotlight and protective glass for jumbo power of floodlight);
◎ Power regeneration by solar energy (solar cell base plate);
◎ Fine instruments (optical filter);
◎ Semi-conductor technology (LCD disc, display glass);
◎ Iatrology and bio-engineering;
◎ Safety protection (bullet proof glass).
■ Product characteristic
General
Glass type | Borosilicate Glass 3.3 |
Manufacturing | Float process |
Colour | Clear |
Sizes
Thickness (mm) | 1.50 | 2.25 | 3.00 | 3.80 | 5.00 | 6.00 | 7.50 |
2.00 | 2.75 | 3.30 | 4.00 | 5.50 | 6.50 | 8.00 |
Thickness tolerance | ±0.2 | ±0.3 |
Dimension | 600mm ×1200mm (max.800mm×2000mm) |
Net sized glass of strengthening can be supplied Glass of cut size is available |
Size tolerance | L≤1m | 1m＜L≤2m |
±1mm | ±2mm |
Physical Properties
Density (at 25℃) | 2.23±0.02g/㎝3 |
Modulus of elasticity | 68kN/㎜2 |
Thermal Date
Co-efficient of expansion (20-300℃) | 3.3±0.1×10-6 |
Softening point | 820±10℃ |
Strain point | 516±10℃ |
Heat conductivity at 90℃ | 1.2W/mk |
Caloricity | (20-100℃) 0.82KJ×(kg×K)-1 |
Thermal shock resistance Strengthening type | 180K ＞300K |
Identical temperature difference Strengthening type | 100K ＞300K |
Maximum wording temperature Short time (＜10h) Long time (＞10h) | 500℃ 450℃ |
Optical Property
Refractive | nd: 1.47384 |
Light transmission | Thickness （mm） | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
Quantity | 92% | 91% |
Chemical Performance
Water resistance | ISO719/DIN12111 HGB1 ISO720 HGA1 |
Acid resistance | ISO1776/DIN12116 1 |
Alkali resistance | ISO695/DIN52322 A2 |
Electrical Property
Specific resistance lg ρ | 8.0Ω×cm at 250℃ |
Dielectric dissipation fraction tan σ (1 MHz 20℃) | 38×10-4 |
Dielectric constant | ε＝4.7 |
