Silicon ( Si )

 Silicon  Silicon  Silicon

Diced Silicon substrat

 

Crystal properties

   

Crystal Type

cubic, diamond structure

Silicon

Transmission Range

1.2 ... 15 µm

 

Refractive Index

3.4179 @ 10 µm

 

Reflective Loss

46.1 % @ 10 µm

 

Density.

2.3291 g/cm3

 

Melting Point:

1420 °C

 

Molecular Weight:

28.086

 

Thermal Conductivity

163.32 W / (m K)

 

Specific Heat

703.4 J / (kg K) @ 25 °C

 

Thermal Expansion.

4.05 × 10–6 / K @ 10...50 °C

 

Hardness (Knoop)

1150 (Mohs 7)

 

Young’s Modulus

131 GPa

 

Shear Modulus

79.9 GPa

 

Bulk Modulus

102 GPa

 

Rupture Modulus

340 MPa

 

Elastic Coefficien

C11 = 167 / C12 = 65 / C44 = 80 Gpa

 

Dielectric Constant

13 @ f = 9.37 GHz

 

Solubility in Water

Insoluble

 

Crystal Structure

single crystal

 

Cleavage Planes

None

 

Application

material for IR optic and Electronics

 

List of Optical Crystals

Materials

Refractive Index

Transmission
Range (mm)

Density
(g/cm³)

Thermal Expansion 
Coefficient (10-6/K) 

BK7 glass

1.5164 (588 nm)

0.330 – 2.1

2.51

  7.5 

SF11 glass

1.78472 (588 nm)

0.370 – 2.5

4.74

  6.8 

F2 glass

1.62004 (588 nm)

0.420 – 2.0

3.61

  8.2 

Fused Silica

1.4858 (308 nm)

0.185 – 2.5

2.20

  0.55 

CaF2

1.399  (5.0 mm)

 0.170 – 7.8

3.18

18.85 

BaF2

 1.460 (3.0 um)

 0.15 – 12.0

4.88

18.4 

Sapphire

1.755 (1.0mm)

0.180 – 4.5

3.98

  8.4 

Silicon

3.4179 (10mm)

 1.200 – 7.0

2.33

  4.15 

Ge

4.003 (10 mm)

 1.900 – 16

5.33

  6.1 

ZnSe

2.40  (10 mm)

0.630 – 18

5.27

  7.8 

ZnS

2.2 (10mm)

0.380 –14

4.09

  6.5 

LiF

1.39 (500 nm)

 0.150 – 5.2

2.64

37 

KBr

1.526 (10 mm)

 0.280 – 22

2.75

43 

 MgF2

no =  1.3836
ne = 1.3957
(405 nm)

0.130 – 7.0

7.37

a: 13.7
b:  8.48 

YVO4

no = 1.9500
ne = 2.1554
(1.3 mm)

0.400 – 5.0

4.22

a: 4.46
b: 11.37 

Calcite

no =  1.6557
ne = 1.4852
(633 nm)

0.210 – 2.3

2.75

a: 24.39
b:   5.68 

Quartz

no =  1.5427
ne = 1.5518
(633 nm)

0.200 – 2.3

2.65

7.07 

α-BBO

no =  1.6749
ne = 1.5555
(532 nm)

0.190 – 3.5

3.85

a:   4.0
c: 36 

LiNbO3

 no =  2.2863
ne = 2.2027
(633 nm)

0.370 – 4.5

4.64

a: 16.7
c: 2.0