Glass-Ceramic (Zerodur zero-CTE) vs Lead Glass (Crystal Glass ~24% PbO)
Property comparison of Glass-Ceramic (Zerodur zero-CTE) and Lead Glass (Crystal Glass ~24% PbO), both glass.
| Property | Glass-Ceramic (Zerodur zero-CTE) | Lead Glass (Crystal Glass ~24% PbO) | Difference |
|---|---|---|---|
| Elastic modulus | 91,000 MPa | 58,000 MPa | -36% |
| Shear modulus | 36,000 MPa | 23,000 MPa | -36% |
| Poisson ratio | 0.24 | 0.22 | -8% |
| Density | 2,530 kg/m³ | 3,100 kg/m³ | +23% |
| Thermal conductivity | 1.46 W/m·K | 0.7 W/m·K | -52% |
| Specific heat | 800 J/kg·K | 410 J/kg·K | -49% |
| Coefficient of thermal expansion | 0 1/K | 0.000009 1/K | +42900% |
Difference is Lead Glass (Crystal Glass ~24% PbO) relative to Glass-Ceramic (Zerodur zero-CTE). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- DIN
- standard
- EN 12128
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