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  • Corning 7979 Fused Silica Glass
  • Corning 7979 Fused Silica Glass
  • Corning 7979 Fused Silica Glass
  • Corning 7979 Fused Silica Glass
Corning 7979 Fused Silica GlassCorning 7979 Fused Silica GlassCorning 7979 Fused Silica GlassCorning 7979 Fused Silica Glass

Corning 7979 Fused Silica Glass

  • Product Item : RT20220503001#
  • Category: Materials
  • Type: Corning Optical Substrate
  • Substrate: Corning 7979 Hpfs
  • Oh Content [Ppm]: Less Than 1
  • Strain Point: 1068 Celsuis Degrees
  • Product description:Corning 7979 Fused Silica Glass/Corning Fused Silica 7979 Glass/Corning 7979 Hpfs Fused Silica/Corning Quartz
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General Introduction: Corning 7979 are high purity, noncrystalline silica glasses that combine a very low thermal expansion coefficient with excellent optical qualities and exceptional transmittance. Characteristics include homogeneity, low birefringence and outstanding transmittance in the DUV, UV, visible, and infrared ranges.
Corning HPFS Fused Silica glasses are known throughout the industry for their consistent, repeatable performance. We offer many different grades of fused silica to support various product applications. Glass codes 7979 is high purity non-crystalline silica glasses with excellent optical qualities. Product characteristics include extraordinarily low refractive index variations leading to state-of-the-art homogeneity values, low birefringence values, large size capabilities, exceptional transmittance from the deep ultraviolet through the infrared region, and an ultra-low thermal expansion coefficient; all of which are critical to our customers demanding needs

Products Name: Corning 7979 Fused Silica Glass
Alias: HPFS Fused Silica 7979,Corning 7979, Corning 7979 fused silica, Corning 7979 fused silica glass, HPFS Corning 7979 fused silica, Corning 7979 semiconductor, 7979 Corning, 7979 Corning glass, Corning 7979 glass, 7979 Corning fused silica,etc


Optical and Thermal Properties:

Glass Code: 7979 Viscosity
Softening Point* 1627 ˚C 107.6 poises
Annealing Point* 1180 ˚C 1013 poises
Strain Point* 1068 ˚C 1014.5 poises
Specific Heat 0.770 J/(g K)
Thermal Conductivity 1.38 W/(m K)
Thermal Diffusivity 0.0075 cm2/s
Thermal Expansion** (ppm/C):
5 ˚C to 35 ˚C 0.52 x 10-6
0 ˚C to 200 ˚C 0.57 x 10-6
-100 ˚C to +200 ˚C 0.48 x 10-6
ASTM Procedures - *C-598, **E-228

Mechanical Properties:
Unless otherwise stated, all values @ 25 °C
Elastic (Young's) Modulus 73 GPa
Shear Modulus 31 GPa
Modulus of Rupture, abraded 52.4 MPa
Bulk Modulus 35.9 GPa
Poisson's Ratio 0.16
Density 2.20 g/cm3
Knoop Hardness (100g load) 522 kg/mm2
Tensile Strength 54 MPa
Compressive Strength 1.14 GPa

HPFS Data and Properties:
Grade 7979 IR Grade;
Inclusion Class 0, 1, 2
Homogeneity Grade AA, A, C, F
Birefringence
Lower specifications
available upon request[nm/cm]
≤ 5
Striae ISO 10110-4 Class 5
Metallic Impurities [ppb] < 100
OH Content [ppm] < 1

Main Applying Fields:

Applying Fields: Application of microlithography
Lithography lens,
Photomask substrate
Deep ultraviolet laser element
Optical standard parts
Excimer laser optics
Lithographic optics
Beam transmission element
Light guide
Laser fusion
Application of various aerospace technologies
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Main Cooperation Materials Manufacturers: 
CORNING, OHARA, SCHOTT, LEONI, AGC,HELLMA, NIKON,VITRON,C-LASER,ETC

Main Export Countries & Areas: 
Usa, Uk, Japan, Germany, Spain, France, Swiss, Korea, Russia, Pakistan, India, Portugal, Canada, New Zealand, Australia, Saudi Arab, Turkey, Finland, Poland ,etc.

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Tel:0086 021-59962058

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