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SCHOTT Superwhite B 270® Flat Glass

 

Description:
SCHOTT offers B 270® i crown glass in sheet glass form to meet a wide variety of different market demands, especially suitable for Biotech applications. It is manufactured using a special up-draw process developed by SCHOTT.

 

B 270® i is highly resistant to solar radiation and offers high transmittance in the visible wavelength range. It also has a fire-polished surface and offers high chemical stability.

 

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Features: Applications:
  • High transmission
  • Excellent surface quality
  • Can be thermally or chemically strengthened
  • Large area LCD covers
  • Cover panes for copying machines
  • Front covers for oscillograph tubes
  • Optical elements for light sensors
  • Signal optics

 

Physical Properties:

 

Mechanical:
  • Density (25°C) ρ
  • Young’s Modulus Ε
  • Poisson’s Ratio μ
  • Knoop Hardness HK0.1/20
  • Bending strength σ
2.55 g/cm3
71.5 kN/mm2
0.219
542
29.3 kN/mm2
159.2 lb/ft3
10.4 Mpsi
0.219
542
4.2 Mpsi

Viscosity:

  • Softening Point (107.6 poises)
  • Annealing Point (1013 poises)
  • Strain Point (1014.5 poises)
724 °C
541 °C
511 °C
1335 °F
1006 °F
991 °F

Thermal Expansion:

  • 0 – 300 °C (32 – 572 °F)
9.4 x 10-6/K

Optical:

  • Index of Refraction @
546nm
588nm
1.5252
1.5231

SCHOTT SuperwhiteElectrical:

  • Log10 Volume Resistivity:
(250°C, 482°F)
(350°C, 662°F)
1 x 109 ohm*cm
1.6 x 107 ohm*cm

Dimensions:

  • Thicknesses: 0.9mm – 10mm
  • Sizes: Up to 66” x 28” (1676.4 x 711.2mm)
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