Optical Glass picture, 1737
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1737F Alkali Free Glass

Boro-Aluminosilicate glass

Special Properties

  • Alkali content close to zero
  • High thermal shock resistance
  • Good flatness and surface quality
  • Low thermal coefficient of expansion

Typical Applications

  • Substrate glass for filter or mirror coatings
  • "Chip on glass" substrates
  • Thin film glass substrate for electronic applications
  • Active matrix flat panel displays (AMLCD)
  • Electroluminescent display glass
  • Optical windows
  • Sensor technology optics
  • Substrate for coated optics

1737F alkaline earth boro-aluminosilicate glass features a high temperature and shock resistance. The near zero alkali glass was developed by CORNING to withstand the rigorous cycles of poly-silicon transistor processes. The low alkali content in the glass and its strain point of 666°C, allow special manufacturing processes for various electronic components that are not possible with most other glass materials. A coefficient of thermal expansion closely matched to silicon opens up the option for chip-on-glass (COG) applications. In addition, 1737F features an exceptionally low micro roughness and a very good optical quality. In general the natural surfaces of 1737F glass have a lower micro roughness than most mechanically polished glasses can provide. The glass is an excellent choice as a substrate material for optical filter or mirror coatings. Corning 1737 glass is more durable than its predecessor 7059 and has an even lower level of alkali and a lower shrinkage. In most applications unannealed 1737 F LCD glass can even replace annealed 7059 glass, resulting in considerable cost savings to the user. An alternative near zero alkali glass to 1737 is EAGLE 2000 also made by CORNING.

To request windows or substrates made of 1737 Low Alkali Glass with individual dimensions, please click on the button below:

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Optical Transmission 1737 low alkali glass
Optical transmission spectrum of 1737 glass

UV-Transmission at 0,7mm thickness
UV-Transmission of 1737 low alkali glass
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 (200g/25sec)

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.% (typ. < 0,05%)


5% NaOH


5% HCL

Standard Thicknesses

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

Standard Thicknesses (click on thickness for pricing)

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