Quartz Crystal
Shape:
Waveplates, Windows, Polarizers etc
Flatness:
≤λ/10@633nm
Parallelism:
≤3”
Surface quality:
40/20~10/5
Bevel:
<0.2mmx45°
| wdt_ID | Attributes | Value |
|---|---|---|
| 1 | Transmission Range : | 0.18 to 3.5 μm (also >40 μm) |
| 15 | Refractive Index: | No 1.54421; Ne 1.55333 at 0.6 μm |
| 16 | Reflection Loss: | 8.8% at 0.6 μm (2 surfaces) |
| 17 | Absorption Coefficient: | n/a |
| 18 | Reststrahlen Peak: | n/a |
| 19 | dn/dT: | -5.5 x 10⁻⁶/°K (para) & -6.5 x 10⁻⁶/°K (perp) @ 633nm (3) (4) |
| 20 | dn/dμ = 0: | 1.3 μm |
| 21 | Density: | 2.649 g/cc |
| 22 | Melting Point: | 1710 °C |
| 23 | Thermal Conductivity: | 10.7 (para) 6.2 (perp) W m⁻¹ K⁻¹ at 323 K |
| 24 | Thermal Expansion: | 7.1 (para) 13.2 (perp) x 10⁻⁶/°C |
| 25 | Hardness: | Knoop 741 with 500g indenter |
| 26 | Specific Heat Capacity: | 710 J Kg⁻¹ K⁻¹ |
| 27 | Dielectric Constant: | 4.34 (para) 4.27 (perp) at 30MHz |
| 28 | Youngs Modulus (E): | 97.2 (para) 76.5 (perp) GPa |
| 29 | Shear Modulus (G): | 31.14 GPa |
| 30 | Bulk Modulus (K): | 36.4 GPa |
| 31 | Elastic Coefficients: | C11=87 C12=7 C44=58 C13=13 C14=(-)18 C33=106 (1) (2) |
| 32 | Apparent Elastic Limit: | 41MPa (5950psi) |
| 33 | Poisson Ratio: | n/a |
| 34 | Solubility: | Insoluble in water |
Quartz Crystal is used extensively as a wave retardation medium. The birefringent properties of Quartz are of use in quarter-wave plates and in polarisers and other polarization applications. Quartz should not be processed or used at temperatures greater than 490 °C
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