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SCHOTT Borofloat® 33 – Multi-Functional Float Glass

 

Description:
SCHOTT Borofloat® 33 is a versatile borosilicate glass with excellent light transmission, thermal properties, and chemical resistance. Its unique properties make it desirable in many different applications, from high temperature lighting windows, view ports in extreme conditions, to the medical and semiconductor industry. Borofloat® wafers are an excellent substrate for MEMS (micro-electro-mechanical systems), as its coefficient of thermal expansion is very similar to silicon and allows for anodic bonding between the two. The low density of Borofloat® also makes it an excellent choice for lighter weight laminated glass systems such as (bulletproof glass).

 

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Features: Applications
  • Excellent flatness and surface quality
  • Very good optical properties
  • Low thermal expansion
  • High chemical durability
  • Low density
  • High temperature windows for lighting
  • Optical windows, filters, and mirrors
  • MEMS devices
  • Chemically resistant view ports
  • Bulletproof glass systems

 

Physical Properties:

Mechanical:
  • Density (25°C) Ρ
  • Young’s Modulus Ε
  • Poisson’s Ratio μ;
  • Knoop Hardness HK0.1/20
  • Bending strength σ
2.2 g/cm3
64 kN/mm2
0.2
480
25 MPa
137.3 lb/ft3
9.28 Mpsi

 

 

3.63 x 103 psi

Viscosity:
  • Working Point (104 poises)
  • Softening Point (107.6 poises)
  • Annealing Point (1013 poises)
  • Strain Point (1014.5 poises)
1270 °C
820 °C
560 °C
518 °C
2318 °F
1508 °F
1040 °F
964 °F
Thermal Expansion:
  • 0 – 300 °C (32 – 572 °F)
3.25 x 10-6/K
Optical:
  • Index of Refraction @
435.8nm
479.9nm
546.1nm
589.3nm
643.8nm
656.3nm
1.4802
1.4768
1.4731
1.4713
1.4695
1.4692
Electrical:
  • Log10 Volume Resistivity:
(250°C, 482°F)
(350°C, 932°F)
8.0
6.5
Dimensions:
  • Thicknesses:
  • Sizes:
0.7mm – 25.4mm
Up to 90″ x 67″(2286 x 1701.8mm)

SCHOTT Borofloat 33

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