Société chinoise de cristal Sggg
China Sggg crystal supplier
Sggg crystal factory
Sggg crystal wholesale


Le cristal Sggg, à savoir le grenat de gadolinium et de gallium dopé au Ca Mg Zr, est un excellent matériau de substrat pour les films épitaxiaux de grenat Bi Fe.

Product Descriptions

Gadolinium gallium garnet (GGG) substrate, one of the earlier developed garnet materials, can not be used as the substrate of high bismuth substituted iron garnet epitaxial layer because of its small lattice constant. Therefore, the sggg crystals with Ca, Mg and Zr as substitution ions are more suitable for the epitaxial films.

Main Advantages:

Low optical losses (<0.1%/cm)

High thermal conductivity (7.4W m-1K-1)

Typical applications:

Substrate materials for YIG and BIG magneto-optical epitaxial membranes

Magnetic bubble memory storage

Magnetic refrigeration

Propriétés matérielles

Material GGG SGGG
Chemical Formula Gd3Ga5O12 Substituted Gd3Ga5O12
Crystal Structure Cubic Cubic
Constante de réseau a=12.383 Å a=12.497 Å
Growth Method Czochralski Czochralski
Hardness 8.0 7.5
Densité 7.13g/cm³ 7.09g/cm³
Point de fusion 1725℃ 1730℃
Refractive Index 1.954 @ 1064nm 1.954 @ 1064nm

Technical Parameters

Crystro offers:

Dimensions Max Diameter 101.6mm (4 inch)
Thickness 0.5mm Other thickness upon request
Polishing Single or double sides polishing
Orientation <111>±0.2°
Orientation Flat 2°(within 1° for special requirement)
Ra Ra≤1nm, EPI ready
Angle of Crystalline Special size and orientation are available upon request


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