Select Page

SCHOTT BOROFLOAT® 33 Borosilicate Float Glass

SCHOTT BOROFLOAT® 33 is a UV-NIR transparent borosilicate float glass with excellent optical properties and smooth low scatter surfaces straight off the float process. SCHOTT BOROFLOAT® is an economical high performance material, making it ideal for the volume manufacture of windows, mirrors, filters, display glass, 3D build platforms, and other components. SCHOTT BOROFLOAT® 33’s composition lends itself to outstanding thermal resistance and sharp impact crack resistance, making it an excellent choice for challenging use environments. In addition to SCHOTT BOROFLOAT®, Abrisa Technologies offers a wide selection of other technical glass substrate materials, custom fabrication, heat toughening, optical coating, electrical connectivity, screen printing, applied films, oleophobics, laser marking, and more for a Total Solution.

Official Borofloat® Distributor

BOROFLOAT® Features

  • Optical Quality BOROFLOAT® Borosilicate Glass
  • High Transparency/Color Neutral
  • Broad Spectral Range UV-VIS-NIR
  • High Thermal Resistance (Shock & Gradient)
  • Crack Resistant to Sharp Impact
  • Low Thermal Expansion for Tight Seals

BOROFLOAT® Applications

BOROFLOAT® High Performance Optical Windows
BOROFLOAT® Medical Imaging & Lighting Applications
BOROFLOAT® Outdoor Image Sensing Applications
BOROFLOAT® Specialty Display Glass
BOROFLOAT® High Intensity Lighting Applications
BOROFLOAT® 3D Additive Manufacturing Applications
  • Outdoor VIS-NIR Image Sensing
  • “True Color” Medical Imaging
  • High Intensity Lighting & Curing Filters
  • Heated 3D Additive Build Platforms
  • Industrial Sight Glass View Ports
  • Specialty Ruggedized Displays

Soda-Lime vs. SCHOTT BOROFLOAT® 33 Sharp Impact Crack Resistance

Soda-Lime Sharp Impact Crack Resistance
SCHOTT Borofloat® Sharp Impact Crack Resistance

BOROFLOAT® Optical Properties

  • Broad spectral range UV-VIS-NIR
  • High Transparency/Color Neutral
  • Excellent for Imaging/Sensing, Specialty Lighting

BOROFLOAT® Refractive Index Curve

BOROFLOAT® Dispersion - Refractive Index Curve Graph

BOROFLOAT® Transmittance to Thickness

BOROFLOAT® Transmittance to Thickness Graph

BOROFLOAT® Mechanical Properties

  • Sharp Impact Crack Resistant
  • Scratch Resistant
  • Abrasion Resistant
Density ƿ (25°C)
2.23 g/cm3
Modulus E (according to DIN 13316)
64 kN/mm2
Poisson's Ration μ (according to DIN 13316)
0.2
Knoop Hardness HK0.1/20 (according to DIN ISO 9385)
480

BOROFLOAT® Thermal Properties

  • Thermal Shock Resistant
  • Thermal Gradient Resistant
  • High Melting Point
Max. Operating Temperatures
Max. Operating Temperatures
Short Term Usage (< 10h)
500° C
Long Term Usage (> 10h)
450° C

Resistance to Thermal Gradients (RTG) & Resistance to Thermal Shock (RTS) must be considered when determining max. operating temperatures.

Coefficient of Linear Thermal Expansion (C.T.E.) α (20 - 300° C)
3.25 x 10-6 K-1*
Specific Heat Capacity Cp (20-100° C)
0.83 kj / (kg·K)
Thermal Conductivity ʎ (90° C)
1.2W / (m·K)

*According to ISO 7991

Thickness
Standard Sheet Size
2.0 - 15.0 mm
2,300 x 1,700 mm
0.7 - 25.4 mm
1,150 x 850 mm
16.0 - 21.0 mm
*1,700 x 1,300 mm

*Consult factory for availability

Sheet Thickness
Thickness Tolerance
0.70 to 2.25 mm
± 0.05 mm
2.75 mm
± 0.10 mm
3.30 to 6.50 mm
± 0.20 mm
7.50 to 13.00 mm
± 0.30 mm
15.00 mm
± 0.40 mm
19.00 mm
± 0.50 mm
*20.00 mm
± 0.70 mm
*21.00 mm
± 0.70 mm
25.40 mm
± 1.0 mm

*Consult factory for availability

BOROFLOAT® Broad UV-VIS-NIR Transmission

BOROFLOAT® Broad UV-VIS-NIR Transmission Graph

Ready to start your next project?

We strive to provide the best possible solutions and take pride in our attentiveness to your requirements.