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Product Details:
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| Highlight: | Transparent Translucent Ceramics,Translucent Ceramics Alon,Transparent Alpha Alumina |
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TRANSPARENT & TRANSLUCENT CERAMICS
ALON, YAG, SPINEL, ALPHA ALUMINA
Transparent ceramics are polycrystalline non-birefringent materials such as ALON or YAG. Besides, transparency is also achievable by monocrystalline birefringent materials such as sapphire.Translucent ceramics are polycrystalline birefringent aluminas, meaning that there are several diffraction angles for a same wavelength. Translucent ceramics are mostly made of alpha alumina.
| Properties | Y2O3 | YAG | ALON |
| Bulk density(g/cm3) | 5.03 | 4.55 | 3.72 |
| Bending strength at room temperature(MPa) | 200 | 300 | 300 |
| Fracture toughness(MPa) | 2.5 | 2.0 | 1.4 |
| Elastic modulus(GPa) | 164 | 234 | 317 |
| Poisson's ratio | 0.29 | 0.23 | 0.24 |
| Vickers hardness(GPa) | 11 | 13.4 | 16 |
| Thermal conductivity(W/m.k) | 14 | 12 | 12.6 |
| CTE,25~1000℃ | 6~7×10-6 | 8×10-6 | 5.83×10-6 |
| Transmission band | 0.25~8um | 0.25~6um | 0.25~5um |
| Maximum transmittance | 81% | 84% | 80.2% |
| Refractive index n@1000nm | 1.95 | 1.82 | 1.79 |
| Dielectric constant | 11.8 | 10.8(1MHz) | 9.9(1MHz) |
| Dielectric loss | 5×10-4 | 5×10-4 | ＜5×10-4 |
| Melting point /℃ | 2430 | 1950 | 2165 |
Applications of transparent & translucent ceramics
Translucent ceramics appear in:
PCA ceramics for high pressure sodium lamps
Heat dissipation ceramics
Transparent ceramics are applicable for:
Armor windows
Infrared windows
YAG fibers for laser applications
Lasers for wavelength conversion properties
Characteristics
| Material | Alumina | Sapphire | ||
| Ref. NO | ZG | ━ | ||
| Component | Al2O3 99.99% | Al2O3 99.99% | ||
| Color | Translucency | ━ | ||
| Density | g/cm3 | 3.99 | ━ | |
| Water Absorption | ％ | 0 | ━ | |
| Mechanical Properties | Vickers Hardness | GPa | 21.4 | Similar |
| Bending Strength | MPa | 820 | Weaker | |
| Compressive Strength | MPa | 5800 | Weaker | |
| Tensile Strength | MPa | 213 | ━ | |
| Impact Strength | MPa | 0.7 | ━ | |
| Electrical Properties | Volume Resistivity | Ω･cm | 2.0×1016(20～100℃) | ━ |
| Permittivity | 1MHz | 10 | ━ | |
| Dielectric Loss Tangent | 1MHz | ＜0.001 | ━ | |
| Dielectric Strength | kV/mm | ＞10 | ━ | |
| Te Value | ℃ | 1000 | ━ | |
| Thermal Properties | Thermal Expansion Coefficient | 10-6/℃ | 8.2 | ━ |
| Heat Thermal Conductivity | W/m･K | 37 | ━ | |
| Max Operation Temperature | ℃ | 1200 | ━ | |
| Thermal Shock Resistance | ℃ | 200 | ━ | |
Features
Price competitive than single crystal sapphire (In the case of complex shape or bar shape)
High intensity
It can be produced by a green machining method / CIM / Mold press.
Smaller crystals compared to translucent alumina or transparent alumina ceramics.
ZG-9000NS has a greatly smooth surface. (Ra)
ZG-9000NS can be used as a substitute for single crustal sapphires
Applications
Parts for semiconductor devices
Alternative material of Sapphire
Substrates for electric parts
Heat-resistant and Corrosion-resistant material. E.g. Reaction tube, crucible
Medical equipment and analyzers
RF Window
Contact Person: Daniel
Tel: 18003718225
Fax: 86-0371-6572-0196
