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Characteristics of D 263™ thin glass

D 263™ is a borosilicate glass type manufactured using the purest raw materials.

Characteristics:

Outstanding:

  • Low-level mobility of alkali ions
  • High chemical resistance
  • High spectral transmission
  • Easy to cut
  • Excellent surface quality
Dimensions
  • Maximum: For thickneses 0.7 and 1.1 mm: 440 x 430 mm +/-10mm
    For all other thicknesses: 440 mm x 360 mm (other sizes are available on request)
  • Thicknesses: 0.03 mm to 1.1 mm (special thicknesses on request)
  • Option of customized dimensions, processing and tolerances according to customer specifications.
  • Rectangular formats in all thicknesses; round / wafer formats 0.1 mm and above
nominal
thickness
thickness
tolerance
thickness variation
within the sheet
variation within the lot
(from sheet to sheet)
referenced to net width
of 360 mm
[mm]
[mm]
[µm]
0.03
± 0.008
≤10
0.05
±0.010
≤10
0.07
±0.015
≤20
0.10
±0.015
≤20
0.145
±0.015
≤20
0.175
±0.020
≤20
0.21
±0.020
≤20
0.25
±0.020
≤20
0.30
±0.020
≤20
0.40
±0.020
≤20
0.50
±0.030
≤20
0.55
±0.030
≤20
0.70
±0.050
≤30
0.90
±0.050
≤30
1.10
 ±0.050 ≤40


Edge processing:
  • C-shape or chamfering
  • Conventional or Laser cut edge
  • Orientation corner


The following characteristics are based largely on the measurement results of the latest standards and measuring procedures. The specified characteristics refer in part to one time measurements and are not continually monitored. SCHOTT reserves the right to update the data to the latest technology.
Thermal characteristics
Viscosity and Temperature
Description Viscosity
log η [dPas]		 Temperature
θ [°C]
Strain point 14.5 529
Annealing point 13.0 557
Softening point 7.6 736
Transformation temperature in °C 557
Expansion factor α
Coefficient of thermal expansion α(20-300°C) in 10 -6 K -1 (static measurement) 7.2


Mechanical characteristics
Density ρ in g/cm3 2.51
Stress optical coefficient C in 1.02 · 10-12 m2/N 3.4
Young's Modulus E in kN/mm2 72.9
Poisson number µ 0.208
Modulus of torsional shear G in kN/mm2 30.1
Knoop hardness HK100 590


Chemical characteristics
Hydrolytic resistance according to DIN ISO 719
Hydrolytic classification HGB 1
Base equivalent per g glass grains in µg/g 20
Acid resistance according to DIN 12116
Acidity classification 2
50% surface loss after 6 h in mg/dm2 1.4
Alkali resistance according to DIN ISO 695
Classification A 2
Surface loss after 3 h in mg/dm2 88


Electrical characteristics

Dielectric constant εr at 1 MHz 6.7
Dielectrical loss factor tan δ at 1 MHz 61 · 10-4
Electrical volume resistance ρD in Ω · cm at defined temperatures ρD for alternating current 50 Hz
θ = 250 °C 1.6 · 10 8
θ = 350 °C 3.5 · 106


Optical characteristics
Refractive indices
Pre-processing of samples ng 1.5354
"as drawn" nF“ 1.5305
nF 1.5300
ne 1.5255 +/- 0.0015
nd 1.5231
nD 1.5230
nC“ 1.5209
nC 1.5204
Abbe Value νe 55
Transmittance data τλ - Individual Values in % (t = 1.1 mm)
λ [nm] τλ [%]
380 89.8
632.8 91.8
1064 92.0
Edge Wavelength (t=1.1 mm)
Edge Wavelength λC (τ = 0.46) in nm 329
Luminous Transmittance τvD65 in % (t=1.1 mm) 91.2
t = 1.1 mm 91.7 ± 0.3


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SCHOTT North America, Inc.
Corporate Office

555 Taxter Road
Elmsford, NY 10523
USA
 +1 (914)831-2200
 +1 (914)831-2201
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