Glass Type: Glass Ceramics
Description
ULE(R), Corning Code 7972 Ultra Low Expansion Glass is a titania silicate glass with unique characteristics that has made it the material of choice in applications ranging from machine tool reference blocks to solid and lightweight mirror blanks for astronomical telescopes and space satellite applications. Experts in the semiconductor industry have identified ULE(R) as a “material of choice” for EUV applications.
| Thermal Properties | Mechanical Properties | ||||||
|---|---|---|---|---|---|---|---|
| Thermal Coefficient of Expansion | 0.00 +/- 0.03 x 10 7°C | Density | 2.20 g/cm3 (at 20°C/68°F) | ||||
| Annealing Point | 1000°C/1832°F | Knoop Hardness | 460 kg/mm2 | ||||
| Softening Point | 1490°C/2714°F | Young's Modulus | 67.6 Gpa | ||||
| Strain Point | 890°C /1634° F | Poisson's Ratio | 0.17 | ||||
| Chemical Properties | Electrical Properties | ||||||
|---|---|---|---|---|---|---|---|
| Hydrolytic Resistance | N/A | Dielectric Constant | E=3.99 MHz @R.T. | ||||
| Acid Resistance | N/A | Resistivity | 1011ohm/cm @R.T. | ||||
| Alkali Resistance | N/A | Dielectric Strength | 0.5 KV/mm | ||||
| Optical Properties | |||
|---|---|---|---|
| Refractive Index | 1.480 | ||
