Zero CTE Glass: ZERO™
Glass designed to minimize dimensional and positional variations caused by temperature changes
ZERØ™ is a glass with zero thermal expansion, effectively minimizing dimensional and positional changes due to temperature fluctuations. It is ideal for a wide range of components that require precise thermal stability.
Properties
| Coefficient of thermal expansion | -40～80℃ | ×10-7/K | 0 |
| Young’s modulus | GPa | 95 | |
| Vickers hardness | Hv | 680 | |
| Specific gravity | ×103kg/m3 | 2.55 | |
| Refractive index | nd | 1.54 | |
| 1550nm | 1.53 | ||
Thermal expansion curve
Transmittance curve
Reference Data
| Thermal conductivity | W/m・K | 25℃ | 1.6 |
| 100℃ | 1.7 | ||
| Temperature diffusivity | ×10-6m2/s | 25℃ | 0.8 |
| 100℃ | 0.75 | ||
| Specific heat | kJ/(kg・K) | 25℃ | 0.8 |
| 100℃ | 0.9 | ||
| Rigidity | GPa | 39 | |
| Poisson’s ratio | 0.2 | ||
| Knoop hardness Hk | 590 | ||
| Abrasion Aa | JOGIS | 50 | |
| Tensile strength | MPa | 3-point bending | 180 |
| Abbe number γd | 57 | ||
| Photoelastic constant | ×10-6/MPa | 3 | |
| Internal transmittance (10 mmt) | ％ | 580nm | 88 |
| 1550nm | 93 | ||
| Water-resistance | JOGIS RW | Class1 | |
| Acid-resistance | JOGIS RA | Class1 | |
| Alkaline-resistance | ISO 10629 | Class1 | |
| Volume resistivity (Logρ) | Ω・cm | 350℃ | 5.4 |
| Dielectric constant | 1MHz, 25℃ | 7.4 | |
| 2.45GHz, 25℃ | 6.5 | ||
| Dielectric loss tangent (tanδ) | ×10-3 | 1MHz, 25℃ | 17 |
| 2.45GHz, 25℃ | 43 | ||
The values above are measured values and are not guaranteed.
