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YAG substrate

YAG substrate

 

Crystal structure

Cubic

Lattice Constant

12.02 A

Melting point

1970 ℃

Mohs hardness

8.5

Density

4.55 + 0.04g/cm3

Specific heat

0.59J/g cm? -3 @0-20 ℃

Modulus of elasticity

310GPa

Young modulus

3.17x10 4 Kg/mm2

Poisson ratio

0.3

Tensile strength

0.13-0.26GPa

Thermal expansion coefficient

 [111]: 7.8x10 -6  /℃ @0-250℃

[110] : 7.7x10 -6  / ℃ @0-250℃

[100]: 8.2x10  -6 / ℃ @0-250℃

Thermal conductivity

14W/m/K@20 ℃

10.5W/m/K@100 ℃

Calorescence coefficient

Dn/dt = 7.3x10-6 /℃

Thermal shock

800W/m

Refractive index

1.8197@1064mm

Transmittance range

250-5000nm

Anti-optical-damage threshold

≥ 15Jcm -2 @1064nm

Standard Orientation

<111> and <100>

 

Yttrium aluminum garnet (YAG) is a cubic crystal system crystal, It has excellent optical, thermal properties. Its mechanical properties and chemical stability are close to the sapphire(Al2O3) crystal, and doesn't have the sapphire's birefringence; The pure YAG crystal has a high transmittance in the 0.25~5 um region,  and has no absorption at 2-3 um, while the glass has a strong H2O absorption zone in this area. Therefore, undoped pure YAG crystal is a new type of substrate and window material for UV and infrared optical equipment, and the excellent physical and optical properties of YAG crystal make it an important application in high temperature and high energy physical environments.

 

 
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