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Silica Glass (SiO2) |
| Fused Silica is a hard, high temperature pure glass. Fused Silica is used for UV and visible components. Infra-red grades of Fused Silica are available for NIR use |
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Product Data |
| Transmission Range : |
0.18 to 2.2 μm (3 μm for IR grades) |
| Refractive Index : |
1.47012 at 4 μm (1) |
| Reflection Loss : |
7.0% at 0.4 μm (2 surfaces) |
| Absorption Coefficient : |
10 x 10-6 cm-1 at 1 μm |
| Reststrahlen Peak : |
n/a |
| dn/dT : |
+11.9 x 10-6 /°C |
| dn/dμ = 0 : |
1.3 μm |
| Density : |
2.203 g/cc |
| Melting Point : |
1600 °C (softening) |
| Thermal Conductivity : |
1.38 W m-1 K-1 |
| Thermal Expansion : |
0.55 x 10-6 /°C at 300K |
| Hardness : |
Knoop 500 with 200g indenter |
| Specific Heat Capacity : |
703 J Kg-1 K-1 |
| Dielectric Constant : |
3.78 at 25GHz |
| Youngs Modulus (E) : |
73.1 GPa |
| Shear Modulus (G) : |
31.2 GPa |
| Bulk Modulus (K) : |
36.7 GPa |
| Elastic Coefficients : |
n/a |
| Apparent Elastic Limit : |
55 MPa (7980 psi) |
| Poisson Ratio : |
0.17 |
| Solubility : |
Insoluble in Water |
| Molecular Weight : |
28.09 |
| Class/Structure : |
Amorphous glass |
To download this data as a pdf file, or to download our MSDS safety data sheet, please click on the links at the top of the page. To expand the transmission graphs, please click on the image.
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Refractive Index |
| µm |
No |
µm |
No |
µm |
No |
| 0.20 |
1.55051 |
0.25 |
1.50745 |
0.30 |
1.48779 |
| 0.36 |
1.47529 |
0.40 |
1.47012 |
0.45 |
1.46557 |
| 0.50 |
1.46233 |
0.55 |
1.46008 |
0.60 |
1.45804 |
| 0.65 |
1.45653 |
0.70 |
1.45529 |
0.75 |
1.45424 |
| 0.8 |
1.45332 |
0.85 |
1.4525 |
0.90 |
1.45175 |
| 1.0 |
1.45042 |
1.1 |
1.4492 |
1.2 |
1.44805 |
| 1.3 |
1.44692 |
1.5 |
1.44462 |
1.6 |
1.44342 |
| 1.7 |
1.44217 |
1.8 |
1.44087 |
1.9 |
1.43951 |
| 2.0 |
1.43809 |
2.2 |
1.43501 |
2.4 |
1.43163 |
| 2.6 |
1.42789 |
2.8 |
1.42377 |
3.0 |
1.41925 |
| 3.2 |
1.41427 |
3.37 |
1.41099 |
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Product Notes |
Fused Silica is the glassy form of Quartz and is thus isotropic. Fused Silica is tough and hard and has a very low expansion. Normal varieties of Fused Silica contain water which gives strong absortion in the IR. Water-free varieties of Fused Silica are available.
REFERENCES:
(1) Handbook Optical Constants, ed Palik, V1, ISBN 0-12-544420-6
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Data provided is extracted from our technical handbook of materials. While every attempt has been made to verify the source of the information, Crystran Ltd accept no responsibility for accuracy of data |
