AUTC Optical produces of high borosilicate glass, with a good appearance, high temperature, resistance strong pressure, acid and alkali, high transparency, good quality, After cutting, grinding, polishing, milling,Tempered and so on process to complete.
Product description:
Borosilicate glass is one of transparent colorless glasses, the wavelength is between 350nm to 2500nm, and the transimitance is more than 90%, the high temperature is up to 400°C,If course handling, the high temperature resiatant can reach 550°C.
1. Raw material: Borosilicate glass, Pyrex, Optical glass.
2. Processing: by Molding, Grinding, Polishing.
3. Surface quality: optical surface quality and well controlled tolerance
4. Inside quality: clear and transparent, no mold marks, no inside bubble and dirts.
5. Great heat resistance performance,stable chemical property.
6. Working field :widely used in high-temperature observation windows, lighting (high-power lighting panel), appliances, laboratory containers, solar, lighting and other fields.
Specification of our quartz glass as following:
Range of diameter | Dia.0.7mm-Dia.400mm |
Range of curve radius | R1.5-R∞ etc. |
Tolerance of diameter | +/-0.1, +/-0.01, +/-0.005 etc. |
Surface accuracy | λ , 1/2λ , 1/4λ , 1/10λ etc. |
Tolerance of Thickness | +/-0.1, +/-0.05, +/-0.01 etc. |
Centration | +/-2′,+/-1′ etc. |
Aperture N | 5, 1 etc. |
Irregularity ΔN | 2, 1, 0.5, 0.2 etc. |
Surface quality | 60/40, 40/20, 20/10, 10/5 etc. |
Silicon content | >80% |
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Strain and Temperature | 520ºC |
Annealing temperature | 560ºC |
Softening temperature | 820ºC |
Index of refraction | 1.47 |
Transmittance | >=90% |
Elastic modulus E | 67KNmm-2 |
Tensile strength | 40-120Nmm-2 |
Processing temperature(104dpas) | 1220ºC |
Coefficient of thermal expansion(20-300ºC) | 3.3×10-6/K-1 |
Poisson's ratio μ | 0.2 |
Density(20ºC) | 2.23g/cm3 |
Specific heat | 0.9Jg-1K-1 |
Thermal conductivity | 1.2Wm-1K-1 |
Water resistance(ISO 719) | 1 Level |
Acid resistance(ISO 195) | 1 Level |
Alkali resistance(ISO 695) | 2 Level |
CML resistant glass rod glass rod Φ6 × 30mm | 300º |