Transparent Aluminiumoxynitride Ceramic Description
Transparent ceramic made from Aluminiumoxynitrid possesses an uncoated light transmittance exceeding 80%. The hardness of Aluminiumoxynitrid is four times that of quartz glass and reaches 85% of that of sapphire. It can withstand temperatures up to 1 200 °C. Transparent ceramic is a polycrystalline material with a specific level of light transmittance. It is produced using ceramic processing and is also termed optical ceramic. In comparison with optical materials derived from glass or resin, transparent ceramics manufactured from Aluminiumoxynitrid are mechanically stronger, harder, more corrosion resistant and more tolerant of high temperatures. They are employed under extremely harsh conditions.
Transparent Aluminiumoxynitride Ceramic Specification
Property
|
ALON
|
Y2O3
|
YAG
|
Bulk density (g/cm³)
|
3.72
|
5.03
|
4.55
|
Flexural strength (MPa)
|
300
|
200
|
300
|
Fracture toughness (MPa)
|
1.4
|
2.5
|
2
|
Elastic modulus (GPa)
|
317
|
164
|
234
|
Poisson's ratio
|
0.24
|
0.29
|
0.23
|
Vickers hardness (GPa)
|
16
|
11
|
13.4
|
Thermal conductivity (W/m·K)
|
12.6
|
14
|
12
|
Thermal expansion coefficient, 25~1 000°C
|
5.83×10⁻⁶
|
6~7×10⁻⁶
|
8×10⁻⁶
|
Grain size
|
0.25~5 µm
|
0.25~8 µm
|
0.25~6 µm
|
Maximum light transmittance
|
80.20%
|
81%
|
84%
|
Refractive index n@1 000 nm
|
1.79
|
1.95
|
1.82
|
Dielectric constant
|
9.9 (1MHz)
|
11.8 (1MHz)
|
10.8 (1MHz)
|
Dielectric loss
|
<5×10⁻⁴
|
5×10⁻⁴
|
5×10⁻⁴
|
Melting point (°C)
|
2165
|
2430
|
1950
|
Applications for Transparent Aluminiumoxynitride Ceramic
Transparent Aluminiumoxynitride Ceramic is used for the following purposes:
- Lenses
- Windows
- Laser components
- Scintillators