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Gadolinium Gallium Garnet (GGG)

Gadolinium Gallium Garnet (GGG)


Gadolinium Gallium Garnet (GGG) is a special substrates used in magneto-optical film. In optical communication equipment, YIG or BIG films placed in a magnetic field are core components in the optical isolators. Different tangential GGG single crystal substrates can be matched with the crystal lattice of such magneto-optical materials to ensure the good epitaxial growth of YIG and BIG films. GGG is also a substrate material for making microwave isolators.

Physical Properties

Material GGG
Structure Cubic
Lattice (A) a=12.376
Growth Method Czochralski
Hardness 6.0-7.0 (Mohns)
Purity 99.95%
Melting point 1800℃
Density(g/cm3) 7.09 g/cm3
Index of Refractive  1.95


Size 10x3, 10x5, 10x10, 15x15, 20x15, 20x20,Dia 2'' x 0.33 mm
Thickness 0.5 mm, 1.0 mm
Polished SSP or DSP
Orientation <111>
Redirection precision ±0.5°
Redirection the edge special in 1°
Angle of crystalline Special size and orientation are avaiable for request
Ra: ≤5Å5µm×5µm


100 clean bag, 1000 exactly clean room
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