Gadolinium Gallium Garnet (GGG) is a special substrate for magneto-optical thin films. GGG single crystal substrates with different tangential directions can be optimally matched with the crystal lattice of YIG and BIG thin film magneto-optical materials, so as to ensure the successful epitaxial growth of YIG and BIG thin films. GGG crystal is also the best substrate material for making microwave isolators.
| Main Property Parameters | |
| Crystal System | Cubic |
| Growth Method | Czochralski |
| Crystal Lattice Constant | a=12.376Å,(Z=8) |
| Melt Point（℃） | 1800 |
| Purity | 99.95% |
| Density（g/cm3） | 7.09 |
| Hardness | 6-7（mohs） |
| Refractive Index | 1.95 |
| Dimension（mm） | 5x5，10x5，10x10，15x15，，20x15，20x20，Dia50.8 |
| Thickness | 0.5mm，1.0mm |
| Polishing | One side or two sides |
| Crystal Orientation | <111>/<100>/<110> ±0.5º |
| Crystal Plane Orientation Accuracy | ±0.5° |
| Edge Orientation Accuracy | 2°（special requirements <1°） |
| Bevel Wafer | According to specific requirements, wafers with edge-oriented crystal planes inclined at a specific angle (inclination angle 1°-45°) can be processed. |
| Surface Roughness | ≤5Å（5µm×5µm） |
| Packaging | Clean bag (100), Super clean room (1000) |
