Optical Glass picture, 1737
 
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1737F

Alkali-free boro-aluminosilicate glass

Special Properties

  • Nearly alkali-free glass composition
    (alkali content ≤ 0,1%, typical < 0,06%)
  • High thermal shock resistance
  • Low microroughness and smoothness
  • Very good flatness and high surface quality
  • Small thermal coefficient of expansion

Typical Applications

  • Substrate glass for filter or mirror coatings
  • Substrates for "Chip on glass"-applications (COG)
  • Thin film substrates for electronics
  • Glass for active matrix flat panel displays (AMLCD)
  • Electroluminescent displays
  • Optical windows
  • Optics for sensor technology
  • Optoelectronics
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The alkaline earth boro-aluminosilicate glass 1737F is highly resistant to temperature and thermal shock. It is a near zero alkali glass developed by CORNING that withstands the rigorous cycles of poly-silicon transistor processes. A low alkali content in the glass and its high strain point of 666 °C allow special manufacturing processes required for various electronic components that are not possible with most other glass materials. A coefficient of thermal expansion close to the one of silicon opens up the option for chip-on-glass (COG) applications. Furthermore, 1737F features an exceptionally low microroughness and a very good optical quality. In general, the natural surfaces of 1737F glass already have a lower micro-roughness than most mechanically polished glasses. Hence the glass is an excellent substrate choice for optical filter- or mirror coatings. Corning 1737 glass materials are more durable than their predecessor 7059 and have an even lower alkali content and less shrinkage. In most applications unannealed 1737F LCD-glass can even replace annealed 7059 glass, resulting in considerable cost savings. A newer, also almost alkali-free glass that represents an alternative to 1737F is EAGLE 2000, also from CORNING.

To request windows or substrates made of 1737F low-alkali-glass with individual dimensions, please click on the button below:

 

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Specifications

Transmission

Optical Transmission

View optical transmission spectrum of 1737 glass

UV-Transmission at 0,7 mm thickness

UV-Transmission

View UV-Transmission of 1737 glass

Optical Properties

  • Birefringence Constant: 333 (nm/cm)/(kg/mm2)

Wavelength (nm)

Refractive Index

Mechanical Properties

435,8 1,5287
480,0 1,5247
486,1 1,5244
546,1 1,5203
589,3 1,5183
643,8 1,5161
656,3 1,5160
1300 1,5051
1541 1,5023

Thermal Properties

  • Density: 2,54 g/cm3 (20 °C)
  • Young's modulus: 70,9 GPa
  • Poisson's ratio: 0,23
  • Shear modulus: 28,9 GPa
  • Vickers hardness: 633 (200 g / 25 sec)

Electrical Properties

  • Coefficient of thermal expansion
    • 37,6 x 10-7/ °C (0-300 °C)
    • 42,0 x 10-7/ °C (20-671 °C)
  • Viscosities:
    • Working Point (104 dPa): 1312 °C
    • Softening Point (107,6 dPa): 975 °C
    • Annealing Point (1013 dPa): 721 °C
    • Strain Point (1014,5 dPa): 666 °C

Chemical Properties

  • Dielectric Constant 5,7 (20 °C ; 1 kHz)
  • Volume Resistivity (Log10):
    • 13,5 (250 °C)
    • 11,4 (350 °C)
    • 9,3 (500 °C)

Chemical Durability

  • Alkali content: approximately 0,1 wt.-% (typical < 0,05%)

Medium

5% NaOH

Na2CO3-0,02N

5% HCL

Standard Thicknesses

Temp. (°C) 95 95 95
Reaction Time (h) 6 6 24
Weight loss
(mg/cm2)
1,76 0,17 0,46

Standard Thicknesses
(click on desired thickness for a price quote)

For further technical information, please email us.

All given details and specifications are mean reference values and are not guaranteed. In addition please consider our "Notes on technical specifications"

 

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