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Yttrium Aluminium Garnet (YAG)

♦ Yttrium Aluminium Garnet (YAG) Data Sheet    ♦ Yttrium Aluminium Garnet (YAG) MSDS

YAG (Yttrium aluminium oxide Y3Al5O12) is an active laser crystal when dopants such as Nd, Tm, Er, and Cr are used. Being cubic there is no double refraction and it is sometimes used for a window material substituting for sapphire.

Transmission Range :0.21 to 5.5 μm
Refractive Index :1.81523 at 1.06 μm (1)
Reflection Loss :16.7% at 1.06 μm
Absorption Coefficient :n/a
Reststrahlen Peak :n/a
dn/dT :+9.1 x 10-6 K-1 at 1064nm (2)
dn/dμ = 0 :n/a
Density :4.56 g/cc
Melting Point :1940 °C
Thermal Conductivity :14 W m-1 K-1
Thermal Expansion :7.8 (111), 7.7 (110), 8.2 x 10-6 K-1 (100)
Hardness :Knoop 1215
Specific Heat Capacity :590 J Kg-1 K-1
Dielectric Constant :11.7
Youngs Modulus (E) :300 GPa
Shear Modulus (G) :n/a
Bulk Modulus (K) :n/a
Elastic Coefficients :C11=333; C12=111; C44=115
Apparent Elastic Limit :280 MPa
Poisson Ratio :n/a
Solubility :Insoluble in water
Molecular Weight :593.62
Class/Structure :Cubic, m3m

To download this data or our MSDS safety data sheet as a pdf, please click on the links at the top of the page.  To expand the transmission graphs, please click on the image.
µm   Noµm   Noµm   No
0.266   1.92780.354   1.87250.532   1.8368
0.800   1.82450.808   1.82170.946   1.8186
1.030   1.81731.064   1.81691.333   1.8146
1.444   1.81401.500   1.81371.640   1.8132
2.014   1.81232.097   1.81212.123   1.8121
2.940   1.8113

YAG crystal is produced by the Czochralski growth process up to approximately 100mm diameter.

REFERENCES:
(1) Handbook of Optical Constants, ed Palik, V3, ISBN 0-12-544423-0
(2) Wilson, Thermo-Optic Coefficients. PhD dissertation. U Southern Calif. Jan 1980