|
4750 Magnolia Street
Port Townsend, WA 98368
Tel: 360-379-6707
Toll Free: 877-452-4910
Fax: 360-379-6907
info@mkt-intl.com
|
Zinc Selenide Properties
Transmission
Optical Properties
| 10% transmission limits (t=6mm)
|
0.5 - 22µm |
| Index of refraction inhomogeneity (n/n)
|
|
|
(ppm @ 0.6328µm)
|
<3 |
| Thermo-optic coefficient, dn/dT(298-358K) |
|
|
(1/K @ 0.6328µm)
|
1.07 x 10-4 |
|
|
(1/K @ 1.15µm)
|
7 x 10-5 |
|
|
(1/K @ 3.39µm)
|
6.2 x 10-5
|
|
|
(1/K @ 10.6µm)
|
6.1 x 10-5
|
| Bulk absorption coefficient
|
|
|
(1/cm @ 1.3µm)
|
5.0 x 10-3
|
|
|
(1/cm @ 2.7µm)
|
7.0 x 10-4
|
|
|
(1/cm @ 3.8µm)
|
4.0 x 10-4
|
|
|
(1/cm @ 5.25µm)
|
4.0 x 10-4
|
|
|
(1/K @ 10.6µm)
|
5.0 x 10-4
|
Indices of Refraction (n)
as a function of wavelength at room temperature (20°C)
| Wavelength (µ) |
n |
Wavelength (µ) |
n |
| 0.54 |
2.6754 |
7.40 |
2.4201 |
| 0.58 |
2.6312 |
7.80 |
2.4184 |
| 0.62 |
2.5994 |
8.20 |
2.4163 |
| 0.66 |
2.5755 |
8.60 |
2.4143 |
| 0.70 |
2.5568 |
9.00 |
2.4122 |
| 0.74 |
2.4518 |
9.40 |
2.4100 |
| 0.78 |
2.5295 |
9.80 |
2.4077 |
| 0.82 |
2.5193 |
10.20 |
2.4053 |
| 0.86 |
2.5107 |
10.60 |
2.4028 |
| 0.90 |
2.5034 |
11.00 |
2.4001 |
| 0.94 |
2.4971 |
11.40 |
2.3974 |
| 0.98 |
2.4916 |
11.80 |
2.3945 |
| 1.00 |
2.4892 |
12.20 |
2.3915 |
| 1.40 |
2.4609 |
12.60 |
2.3883 |
| 1.80 |
2.4496 |
13.00 |
2.3850 |
| 2.20 |
2.4437 |
13.40 |
2.3816 |
| 2.60 |
2.4401 |
13.80 |
2.3781 |
| 3.00 |
2.4376 |
14.20 |
2.3744 |
| 3.40 |
2.4356 |
14.60 |
2.3705 |
| 3.80 |
2.4339 |
15.00 |
2.3665 |
| 4.20 |
2.4324 |
15.40 |
2.3623 |
| 4.60 |
2.4309 |
15.80 |
2.3579 |
| 5.00 |
2.4295 |
16.20 |
2.3534 |
| 5.40 |
2.4281 |
16.60 |
2.3487 |
| 5.80 |
2.4266 |
17.00 |
2.3438 |
| 6.20 |
2.4251 |
17.40 |
2.3387 |
| 6.60 |
2.4235 |
17.80 |
2.3333 |
| 7.00 |
2.4218 |
18.20 |
2.3278 |
Physical Properties
| Crystal Structure
|
cubic |
| Grain size
|
diameter
|
50 - 70 µm
|
| Density
|
diameter
|
50 - 70 µm
|
| Grain size |
(g cm-3@298K)
|
5.27
|
| Resistivity
|
-cm
|
~1012
|
| Chemical Purity
|
(%)
|
99.9996
|
Thermal Properties
| Coefficient of Thermal Expansion
|
|
|
(1/K @ 273 K)
|
7.1 x 10-6
|
|
|
(1/K @ 373 K)
|
7.8 x 10-6
|
|
|
(1/K @ 473 K)
|
8.3 x 10-6
|
| Thermal conductivity
|
|
|
(J/K-m-s @ 298 K)
|
18.0
|
| Heat Capacity
|
(J/g-K @ 298 K)
|
0.339
|
| Maximum operating temperature will depend on the environment
|
Mechanical Properties
| Hardness:
|
Knoop, 50 gm load (kg mm-2)
|
110
|
|
|
Vickers, 1 kg load (kg mm-2) |
112
|
| Flexural Strength (modulus of rupture)
|
|
|
4 pt. loading (psi)
|
8.0 x 103
|
|
|
4 pt. loading (MPa)
|
55
|
| Fracture toughness (critical stress intensity factor, KIC values)
|
|
|
(MPa , Vickers, 100g)
|
0.5
|
| Young's Modulus (elastic modulus)
|
|
|
(psi)
|
9.75 x 106
|
|
|
(GPa)
|
67.2
|
| Poisson's ratio
|
0.28
|
| Rain erosion resistance will depend on the environment
|
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|
