导航菜单
 
产品详情
CaF2

Calcium Fluoride is used for optical windows, lenses and prisms in transmision range 0.15-9mkm. Degradation due to to moisture in the atmosphere is minimal, and polished surfaces of the CaF2 windows may be expected to withstand several years exposure to normal atmospheric conditions.

Since they are nonaxial, CaF2 crystals do not require consideration of axial direction. Because of CaF2 low refractive index, Calcium Fluoride windows can be used without an anti-reflection coating.

Calcium Fluoride is attacked by atmospheric moisture at 600°C, where it begins to soften. The top use temperature is 800C, when moisture is not present. Irradiation of Calcium Fluoride windows causes some loss in UV transmission. CaF2 is sensitive to thermal shock.

Typical applications: VUV - UV - IR imaging systems, excimer laser windows, Spectroscopic windows and lenses.  

Chemical Formula

CaF2

Crystal Class

Cubic, cleaves [111] plane

Lattice Constant, Å

5.46

Density, g/cm3 (20 °C)

3.18

Molecular Weight

78.08

Dielectric Constant for 105 Hz

6.76

Melting Temperature, K

1630

Thermal Conductivity, W/(m K) at 273 K

10

Thermal Expansion, 1/K at 300 K

18.9 x 10-6

Specific Heat, cal/(g K) at 273 K

0.204

Debye Temperature, K

510

Young's Modulus, GPa

75.79

Rupture Modulus, GPa

0.0365

Shear Modulus, GPa

33.76

Bulk Modulus, GPa

83.03

Poisson's Ratio

0.28

Knoop Hardness, kg/mm2

178 [100], 160 [110]

 

µm   

No

µm   

No

µm   

No

0.149   

1.5800

0.161   

1.5490

0.195   

1.5000

0.200   

1.4950

0.222   

1.4800

0.248   

1.4680

0.266   

1.4621

0.280   

1.4584

0.300   

1.454

0.337   

1.4481

0.400   

1.4419

0.486   

1.4370

0.588   

1.4339

0.656   

1.4325

0.687   

1.4320

0.728   

1.4314

0.884   

1.4298

1.014   

1.4288

1.100   

1.4283

1.250   

1.4275

1.650   

1.4256

1.900   

1.4244

2.058   

1.4236

2.450   

1.4214

2.700   

1.4199

2.800   

1.4192

3.050   

1.4175

3.400   

1.4149

4.000   

1.4096

4.400   

1.4057

4.800   

1.4014

5.000   

1.3991

5.304   

1.3952

5.893   

1.3871

6.483   

1.3782

7.072   

1.3681

7.661   

1.357

8.251   

1.3444

8.840   

1.3308

9.429   

1.3161

 

 

 

 

 

脚注信息
 Copyright(C)2013-2014 Tonmin inc Powered by:Tonmin Links:LED Light Bar