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Sodium Chloride Single Crystal
Sodium Chloride (NaCl) single crystal substrates are commonly used as substrate materials for epitaxial thin film growth.
NaCl single crystal substrates are ideal for growing epitaxial film and studying interface diffusion and defects. The film is easily removed from NaCl substrate by floating it off on water or by dissolving away the underlying substrate.
NaCl single crystal is also as spectroscopic accessories and for CO2 lasers.
NaCl is hygroscopic by nature and very sensitive to moisture. NaCl crystal substrates must be stored in desiccator container to avoid hydration
Physical & Chemical Properties:
Crystal structure: Face-centered cubic, (100) Cleavage, FCC, Lattice constant a=5.64 A
Growth method: crystallization process
Density: 2.165 g/cm3
Melting Point: 801°C
Hardness: 18.5 (100), Knoop
Thermal Conductivity: 1.15 Wm-1 oK-1 at 0oC
Thermal Expansion: 44 x 10-6/oC
Specific Heat Capacity: 854 J Kgm-1 oK-1 at 0oC
Dielectric Constant: 5.9
Young’s Modulus: 39.98 GPa
Shear Modulus: 12.61 GPa
Elastic Coefficients: C11=48.5, C12=12.3, C44=12.61
Apparent Elastic Limit: 2.41 MPa
Poisson Ratio: 0.252
Optical Properties:
Transmission Range: 0.2 to 20 microns
Refractive Index: 1.5442 (at 589 nm)
Reflective Loss: 7.5% at 10 microns (2 surfaces)
Restrahlen Peak: 50.1 microns
dN/dT: -36 x 10-6/oC at 0.7 microns
Crystal Properties:
Surface roughness: ~10 nm due to hygroscopic nature
Orientation: (100), (110), (111), +/- 3 degrees
Polishing condition: Single side or double side polished
Size: 10 x 10 x 0.5 mm, 10 x 10 x 2.0 mm, 20 x 20 x 2.0 mm and others sizes upon request.
Caution: This material will dissolve in water.
