Yttrium Aluminium Garnet Transparent Ceramic Description
Yttrium aluminium garnet transparent ceramic has a transmittance high than 80% without coating. Yttrium aluminium garnet is a synthetic crystalline material of the garnet group. It is a cubic yttrium aluminium oxide phase, with other examples being YAlO₃ in a hexagonal or an orthorhombic, perovskite-like form, and the monoclinic Y₄Al₂O₉.
Transparent ceramic refers to a polycrystalline material with a certain light transmittance prepared by the ceramic process, also known as optical ceramic. Compared with glass or resin optical materials, transparent ceramics are stronger, harder, more resistant to corrosion, and more resistant to high temperatures. They can be used in extremely harsh conditions.
Yttrium Aluminium Garnet Transparent Ceramic Specification
Performance
|
YAG
|
Y2O3
|
ALON
|
Bulk density(g/cm3)
|
4.55
|
5.03
|
3.72
|
Flexural strength(MPa)
|
300
|
200
|
300
|
Fracture toughness(MPa)
|
2
|
2.5
|
1.4
|
Elastic modulus(GPa)
|
234
|
164
|
317
|
Poisson ratio
|
0.23
|
0.29
|
0.24
|
Vickers hardness(GPa)
|
13.4
|
11
|
16
|
Thermal conductivity(W/m.k)
|
12
|
14
|
12.6
|
CTE,25~1000°C
|
8×10-6
|
6~7×10-6
|
5.83×10-6
|
Band
|
0.25~6um
|
0.25~8um
|
0.25~5um
|
Maximum light transmittance
|
84%
|
81%
|
80.20%
|
Refractive index n@1000nm
|
1.82
|
1.95
|
1.79
|
Dielectric constant
|
10.8(1MHz)
|
11.8
|
9.9(1MHz)
|
Dielectric loss
|
5×10-4
|
5×10-4
|
<5×10-4
|
Melting point /°C
|
1950
|
2430
|
2165
|
Yttrium Aluminium Garnet Transparent Ceramic Application
Yttrium aluminium garnet transparent ceramic has the following uses:
- Lenses
- Windows
- Laser hosts
- Scintillators