产 品 说 明
| OPTICAL | ||
| Transmission Range | 0.11 to 7.5 microns | |
| Refractive Index | N0=1.3836 Ne=1.3957 at 0.405 microns | |
| Reflection Loss | at 0.200 µm (2 surfaces) for o-ray – 5.9%; for e-ray – 6.2%; | |
| Restrahlen Peak | 20 microns | |
| dN/dT | +2.3 and +1.7 x 10-6/ °C at 0.4 microns | |
| PHYSICAL | ||
| Density | 3.177 g/cm3 | |
| Melting Point | 1255 °C | |
| Thermal Conductivity | 0.3 W/(m K) at 27 °C | |
| Thermal Expansion | 13.7and 8.48 x 10-6/ °C | |
| Hardness | Knoop 415 kg/mm2 | |
| Specific Heat Capacity, cal/(g K) | ||
| at 298 K | 0.24 | |
| at 1700 K | 0.362 | |
| Dielectric Constant | 4.87 parallel and 5.45 perpendicular | |
| Young's Modulus (E) | 138.5 GPa | |
| Shear Modulus (G) | 54.66 GPa | |
| Bulk Modulus (K) | 101.32 GPa | |
| Elastic Coefficients | C11=140.2 C12=89.5 C44=56.8 C33=204.7 C13=62.9 C66=95.7 | |
| Apparent Elastic Limit | 49.64 MPa | |
| Poisson Ratio | 0.276 | |
| CHEMICAL | ||
| Solubility | <0.0002 g/100g water at 0 °C | |
| Molecular Weight | 62.32 | |
| Class/Structure | Tetragonal, can cleave on C-axis | |
| MgF2晶体 | |
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