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VYCOR® 7913

High-temperature glass with 96 % SiO2 content

Special Properties

  • Low thermal expansion
  • High-temperature resistance
  • High-temperature change resistance
  • Low specific weight
  • Heat-resistant 96 % silica-glass
  • Good chemical resistance
  • More economical than quartz glass

Typical Applications

  • Ultraviolet applications
  • Dielectric components
  • Substitution material for Quartz Glass / Fused Silica
  • Heat shields
  • Sight glass windows
  • Thermally resistant glass components
  • Substrates and glass wafers

Related glass types

The thermal properties of VYCOR® 7913 from CORNING are comparable to those of quartz VYCOR raw material and finished opticsglass or fused silica, whereas VYCOR® is significantly more economical. Excellent temperature resistance allows the use of this glass at high continuous operating temperatures of up to 900 °C. The 96% portion of SiO2 in the glass composition results in a low thermal expansion coefficient and high thermal shock resistance. The material better withstands harsh environmental conditions like acids, water, steam, and low and high temperatures than most other glass materials. VYCOR® comes in unpolished rolled glass sheets and is ground and polished to meet the application's technical requirements. The interesting electrical characteristics and high ultraviolet and visible transmittance make this glass an ideal choice for many special technical and optical applications. CORNING discontinued producing VYCOR® raw material many years ago. Please contact us for alternative materials.


To request a quote for windows or substrates made of alternative materials to VYCOR® glass with individual dimensions, please click the button below:


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Note: The production of VYCOR 7913 raw material was discontinued many years ago and is not available anymore. However, we have alternative material options. Please contact us with your detailed requirements.



Show optical transmission spectra


Refractive Index

  • nd = 1,458 (588 nm)


  • 2,18 g/cm3

Young's Modulus

  • 6,62 × 1010 Pa

Coefficient of Thermal Expansion (0-300° C)

  • 7,5 × 10-7 (0–300 °C)

Chemical Properties


5 % NaOH

N/50 Na2CO3

5 % HCL

Temp. (°C) 100 100 95
Duration (h) 6 5 24
Weight loss
0,9 0,07 0,0005
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: April 20, 2024