Borosilicate glass 3.3 from China is similar to the Pyrex made by Corning. It usually has two raw material shape, one is borosilicate glass rod, another is borosilicate float glass,which to be used depends on the product design due these raw material are processed by totally different equipements.
Application: Lighting system, Electronics, Electrical apparatus, Industries, Construction e.g.Lamp cover, Lamp shade, Glass cover, Glass Shade, Light shade, Light cover, Glass sheet, Glass lens, Optical lens, Temper glass, Stage lens, LED lens, Reflector lens, Sight lens, Front lens, Refractor, Molded lens, Spot lens, Flood lens, Plano convex lens, Plano concave lens, Aspheric lens, Ball lens, Flat lens, Round lens, Fresnel lens, Glass filter, Magnifier, Meniscus lens,Glass disk,Glass window…
The physical index of borosilicate glass:
Refractive Index: 1.473@587.6nm
Density: 2.23+/-0.02 g/cm3
Modulus of elasticity: 64 x 103 n/mm3
Coefficient of thermal expansion: 3.3+/-0.1 x 10-6/K
Optical transmission in usable range (wavelength breakdown):90-92%
Working point: 1260+/-20 ℃
Softening point: 820+/-10℃
Annealing point: 560+/-10℃
Strain point: 510+/-10℃
Transformation temperature: 525+/-1.5℃
Dielectric constant: 4.6
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