Windows

Harrick Scientific offers a variety of polished windows for infrared and UV-Vis spectroscopy. Our windows are available in a variety of optical materials, including BaF₂, CaF₂, Ge, KBr, NaCl, Si, SiO₂, ZnSe and ZnS. Our stock discs are listed below. All windows are sold individually. For any sizes or materials not listed, we welcome the opportunity to quote.

Model No. Title Price
WMD-U62 Window ZnSe 13 x 6 mm $267.00

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UV-Vis-IR Optical Materials for Windows
  n KH

(psi)
MOR*

(psi)
useful range cm-1 (μm) chemical properties
Windows

1-2mm
IRE

70mm
Al2O3 1.76 1370 65,000 66,000-2000

(0.15-5.0)
33,000-2800

(0.3-3.7)
Slightly soluble in acids and bases
BaF2 1.47 82 3900 50,000-1000

(0.2-11)
33,000-1100

(0.3-9.5)
Low water solubility; soluble in acid and NH4Cl
CaF2 1.43 158 5300 66,000-1300

(0.15-8.0)
33,000-1500

(0.3-7.0)
Insoluble in water; resists most acids and bases; soluble in NH4 salts
Ge 4.0 550 7000 5000-600

(2.0-17)
5000-900

(2.0-1.4)
Insoluble in water, soluble in hot H2SO4, aqua regia
KBr 1.52 7 160 33,000-400

(0.3-25)
20,000-500

(0.5-20)
Soluble in water, alcohol, and glycerine; hygroscopic
NaCl 1.53 15 350 28,000-700

(0.35-15)
25,000-900

(0.4-12
Hygroscopic; soluble in alcohol, water and NH3
Si 3.42 1150 9000 10,000-100

(1.0-100)
9500-1500 350-FIR

(1.06-6.7 30-FIR)
Insoluble in most acids and bases; soluble in HF and HNO3
SiO2 1.45 461 7100 57,000-4600; 3500-2800

(0.175-2.2; 2.9-3.6)
50,000-5,000

(0.2-2.0 )
Insoluble in water; soluble in HF
ZnS 2.19 355 10,000 22,000-750

(0.45-14.0)
14,000-1000

(0.7-10)
Soluble in acid; insoluble in water
ZnSe 2.40 150 8000 20,000-500

(0.5-20)
20,000-700

(0.5-14.3)
Soluble in strong acids; dissolves in HNO3
n: Refractive IndexKH: Knoop HardnessMOR: Rupture Modulus

The apparent elastic limit is reported for those materials which permanently bend prior to rupturing.

*The modulus of rupture (MOR), m, determines the size of the window needed to withstand a pressure, p.

For a four times safety factor, the thickness of a mounted window, t, with an unsupported diameter, d, is:

 

tclamped = 0.866 d (p/m)1/2

 

tunclamped = 1.05 d (p/m)1/2

 

For assistance with your order, please contact customer service at 1-800-248-3847

 

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