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Crystal Substrates Gallium Gadolinium Garnet Gd3Ga5O12 GGG single crystal
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.It is the best substrate material for infrared optical isolator (1.3 and 1.5um), which is a very important device in optical communication. It is made of YIG or BIG film on the GGG substrate plus birefringence parts. Also GGG is an important substrate for microwave isolator and other devices. Its physical, mechanical and chemical properties are all good for the above applications.

Feature Crystal Substrates GGG crystal
good optical, mechanical and thermal properties |
best substrate for infrared optical isolator |
good substrate for microwave isolator |
Crystal Substrates GGG crystal
Chemical formula | Gd3Ga5O12 |
Crystal structure | cubic |
Lattice parameters, Å | a = 12.383 Å |
Molecular Weight | 1012.5 |
Density, g/cm3 | 7.08 g/cm3 |
Transmission Range | 0.40 ~ 7.0 µm |
Refractive index | 1.97 @480nm, |
Melting Point | 1730°C |
Thermal conductivity at 25°C, W x cm-1 x °K-1 | 7.05 |
Thermal expansion coefficient | 8.2×10-6 /K |
Dielectric Constant | 30 |
Dielectric loss tangent, at 10 GHz | 0.15 |
Colour | Colorless |

Q1: Can I have samples to test?
A: Yes,we are pleased to supply samples to test and check quality,mixed sample order is available.
Q2: Do you have any MOQ limited? A: Our MOQ: 1pcs Q3: What’s the lead time?
A: Sample :2-3 days.Mass production: 15-20 days.
Q4:How do you ship the goods and how long does it take?
A: We usually ship goods by UPS,FEDEX,TNT. It usually takes 3-5 days to arrive.
Q5: Do you offer guarantee for your products?
A: After test them if not pass test,you can return the goods at any time, we will re-offer you again and also bear shipping fee.
Q6: Do you accept OEM?
A: We have our own brand-metalaser. OEM is also acceptable.

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