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Gallium Gadolinium Garnet,
Gd3Ga5O12
Gallium Gadolinium Garnet (Gd3Ga5O12
or GGG) single crystal is material with good optical, mechanical and
thermal properties which make it promising for use in fabrication of
various optical components as well as substrate material for magneto –
optical films and high – temperature superconductors.
Standard products: wafers and substrates with sizes from 10 x 10 mm to
diameter 76.2 mm, thickness 0.5 mm and 1.0 mm, one side or both sides
polished 20/10 S/D, [111] or [100] cut. Other products are available on
request.
Material Properties
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Crystal
structure
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cubic
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Crystal
growth method
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Czochralsky
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Crystal
growth orientation
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<111>
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Melting point , °C
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1750
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Density, g/cm3
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7.08
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Lattice parameter, A
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12.383
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Mohs hardness
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7.5
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Thermal expansion coefficient, K-1
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8.2 - 10-6
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Dielectric constant
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30
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Dielectric loss tangent, at 10 GHz
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0.15
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Transmission range, µm
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~3.0 x 10-4
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Refractive index at:
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480 nm
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1.97
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633 nm
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1.96
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1064 nm
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1.95
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Transparency range, nm
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400 - 7000
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Color
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Colorless
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