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1737F

Alkali-free boro-aluminosilicate glass

Special Properties

  • Nearly alkali-free glass composition
    (alkali content ≤ 0.1%, typical < 0.05%)
  • High thermal shock resistance
  • Low microroughness and smoothness
  • Superior 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)
  • Electroluminescence displays
  • Optical windows
  • Optics for sensor technology
  • Optoelectronics

Related glass types

  • EAGLE2000 (alkali-free boro-aluminosilicate glass)
  • EAGLE XG® (Alkali-free boro-alumino-silicate glass)
  • AF 32® eco (alkali-free alumina-borosilicate thin glass)
  • AF 45 (alkali-free modified borosilicate display glass)
  • 7059 / 7059F (low alkali barium-borosilicate glass)

Request for Quotation

48h-Express Service Available in 48-hour express service

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 polysilicon transistor processes. A low alkali content and its high strain point of 666 °C allow for unique manufacturing processes required for various electronic components that are not possible with most other glass materials. A coefficient of thermal expansion close to that of silicon opens up the option for chip-on-glass (COG) applications. Furthermore, 1737F features exceptionally low microroughness and excellent optical quality. In general, the natural surfaces of 1737F glass already have a lower micro-roughness than most mechanically polished glass at the same thickness. Hence, this glass is an exquisite substrate choice for optical filters or mirror coatings. Corning 1737 glass materials are more durable than their predecessor, 7059, and have an even lower alkali content and less shrinkage. Unannealed 1737F LCD glass can replace annealed 7059 glass in most applications, resulting in considerable cost savings. A newer, almost alkali-free glass representing an alternative to 1737F is CORNING's EAGLE 2000.

To request windows or substrates of 1737F low-alkali glass with specific dimensions, please choose a thickness from the table or click the button below.

 

Request for Quotation

48h-Express ServiceAvailable in 48-hour express service

 

Specifications


Spectral Transmission
Optical Transmission
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UV-Transmission at 0.7 mm thickness
UV-Transmission
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Standard Thicknesses

Please click on glass thickness to request a quote:

Thickness (mm)

Tolerance

 48h-Express Service
0.70 +/-0.07 ✔
1.10 +/-0.10 ✔
The thicknesses marked with "✔" are also available within 48-hour express service.

Optical Properties

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

Refractive indices

Wavelength (nm)

Refractive Index
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

Mechanical 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)

Thermal Properties

  • Coefficient of thermal expansion:
    • 37.6 × 10-7/°C (0-300 °C)
    • 42.0 × 10-7/°C (25-671 °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 °

Electrical 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 Properties

  • Alkali content: ≈ 0.1 wt.-% (typically < 0.05%)

Chemical resistance

Medium

5% NaOH

Na2CO3-0.02N

5% HCL
Temp. (°C) 95 95 95
Reaction Time (h) 6 6 24
Weight loss
(mg/cm2)		 1.76 0.17 0.46

For further technical information, please send us your information request. If you are searching for glass with a low alkali content, the following materials also might be interesting to you:

EAGLE2000 (alkali-free boro-aluminosilicate glass)

AF 45 (alkali-free modified borosilicate display glass)

AF 32® eco (alkali-free alumina-borosilicate thin glass)

 

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

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Last update: May 21, 2024