Хлорид Серебра AgCl

МакроОптика produces mirrors, lenses, windows, prisms, wedges and others optical components according to customers’ specifications and drawings out of crystal silver chloride AgCl.

Silver Chloride is a useful material for deep IR applications where sensitivity to moisture is a problem. This soft crystal deforms under heat and pressure and can be forged in polished dies to create IR windows and lenses. A major use for Silver Chloride is in the manufacture of small disposable cell windows for spectroscopy, known as mini-cells. These windows have a depression of controlled thickness pressed into the surface. The inherent cost of Silver Chloride material is offset against ease of manufacture.

Silver Chloride is grown into small ingots by the sealed-ampoule Stockbarger techniques. Silver chloride is malleable and milky-white it darkens in sunlight, but mild darkening does not affect the IR performance.

Product Data

Transmission Range 0.4 to 25 μm (1)
Refractive Index 1.98 at 10 μm (1)
Reflection Loss 19.5% at 10 μm (2 surfaces)
Absorption Coefficient n/a
Reststrahlen Peak 81.5 μm
dn/dT -61 x 10-6 /°C
dn/dμ = 0 4.5 μm
Density 5.59 g/cc
Melting Point 457 °C
Thermal Conductivity 1.15 W m-1 K-1 at 278 K
Thermal Expansion 31 x 10-6 /°C at 302 K
Hardness Knoop 9.5 with 200g indenter
Specific Heat Capacity 355 J Kg-1 K-1
Dielectric Constant 12.3 at 1MHz
Youngs Modulus (E) 19.98 GPa
Shear Modulus (G) 7.099 GPa
Bulk Modulus (K) 44.04 GPa
Elastic Coefficients C11=60.1 C12=36.2 C44=6.25
Apparent Elastic Limit 26.2MPa (3800 psi)
Poisson Ratio 0.4
Solubility 52 x 10-6 g/100g water at 50°C
Molecular Weight 143.34
Class/Structure Cubic FCC, NaCl, Fm3m, No cleavage, cold flows

Transmittance

Refractive Index

No = Ordinary Ray

µm No µm No µm No
0.500 2.09658 1.000 2.02239 1.500 2.01047
2.000 2.00615 2.500 2.00386 3.000 2.0023
3.500 2.00102 4.000 1.99983 4.500 1.99866
5.000 1.99745 5.500 1.99618 6.000 1.99483
6.500 1.99339 7.000 1.99185 7.500 1.99021
8.000 1.98847 8.500 1.98661 9.000 1.98464
9.500 1.98255 10.00 1.98034 10.50 1.97801
11.00 1.97556 11.50 1.97297 12.00 1.97026
12.50 1.96742 13.00 1.96444 13.50 1.96133
14.00 1.95807 14.50 1.95467 15.00 1.95113
15.50 1.94743 16.00 1.94358 16.50 1.93958
17.00 1.93542 17.50 1.93109 18.00 1.9266
18.50 1.92194 19.00 1.91710 19.50 1.91208
20.00 1.90688 20.50 1.90149