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.

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 HK_0.1/20 (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 C_p (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

All Glass Materials

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