| Customization: | Available |
|---|---|
| Application: | Electronics |
| Grain Size: | 1-10um |
|
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High purity Alumina crucibles (Al2O3 Crucibles) are widely used in a variety of research and industrial applications. Due to its resistance to high temperature, versatility, high abrasion (wear) resistance, high corrosion resistance, and low cost compared with other refractories and ceramic materials these crucibles are mainly used in high temperature furnaces as ceramic crucibles.
These high temperature alumina crucibles have a high compressive strength which provides good thermal shock resistance hence widely used as a melting crucibles in furnaces. High purity alumina (Al2O3) is one the best electrical insulations at high temperatures making it an excellent choice as a thermo-dielectric refractory and is transparent to microwave radio frequencies.
Ceramic alumina crucibles are made of high-purity alumina raw materials (95% to 99.8% alumina content) and used widely in many high-temperature applications (1000 oC to 1700 oC) for high temperature research and industrial applications.
Alumina crucibles are available in a variety of sizes, shapes such as cylindrical crucible, boat crucible, rectangle crucible etc. We can supply alumina crucibles with lid (cover) or without lid and can also customize shape and size as per requirements.
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Tech-data |
Test conditions |
Unit |
95% AL2O3 |
99.5% AL2O3 |
|
Density |
|
g/cm3 |
> 3.60 |
3.7 |
|
Bending Strength |
|
N/m3 |
2.24 × 108 |
> 2.74× 108 |
|
Linear Expansibility |
20~1000C |
a× 10¯ 6 |
- |
- |
|
20~5000C |
a× 10¯ 6 |
6.2~7.5 |
6.2~7.5 |
|
|
20~8000C |
a× 10¯ 6 |
6.5~8.0 |
6.5~8.0 |
|
|
Specific Inductive Capacity |
1MHz |
|
9~10 |
9~10.5 |
|
10GMHz |
|
9~10 |
- |
|
|
Dielectric Loss |
1MHz |
a× 10¯6 |
≤ 4 |
≤ 1.5 |
|
Tangent |
10GMHz |
a× 10¯6 |
≤ 10 |
- |
|
Volume Resistance |
1000C |
Ω . cm |
> 1013 |
> 1014 |
|
3000C |
Ω . cm |
> 1016 |
> 1012 |
|
|
5000C |
Ω . cm |
108 |
- |
|
|
Breakdown Strength |
|
KV/mm |
15 |
- |
|
Thermal Conductivity |
200C |
W/m. K |
25.2 |
29.2 |
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