Corundum crucible
Corundum crucible
1. Stocks at different sizes avalible
2. Best quality
3. Competitive price
4. Raw material from GERMANY
Characters of alumina crucible and ceramic boat crucible:
1)High purity: Al2O3>99%, high chemical etching resistance
2)Temperature tolerance, at 1600°C for long term application, and at 1800°C for short term application
3)Resistant to sudden cold and hot, un-explosive
4)High density of slip casting, high purity alumina crucible, specifications of 99% corundum crucibles: 5ml 10ml 15ml 20ml 25ml 30ml 50ml 100ml 150ml 200ml- 2500ml
Product description of ceramic boat crucible
Name |
Squre alumina crucible |
|
Chemical ingredient |
Al2O3 |
>=99% |
R2O |
<=0.2 |
|
Fe2O3 |
<=0.1 |
|
SiO2 |
<=0.2 |
|
Volume density (g/cm2) |
>=3.80 |
|
Apparent porosity (%) |
<1 |
|
Bending strength (Mpa) |
>350 |
|
Compression Strength(Mpa) |
>12000 |
|
Dielectric constant ∑(1MHz) |
2 |
|
Max. service temperature (.C) |
1800 |
Application of alumina crucible and ceramic boat crucible.
It is used to make TV powder, phosphor, rare earth materials, precious metals and an ideal roasting container to roast high, medium and low ceramic capacitors NTC, PTC piezoelectric ceramics and lithium cobalt oxide, lithium manganese oxide powder.
Alumina (Al2O3) is a hard, chemically resistant material and has the ability to withstand very high temperatures
in aggressive environments. We can offer Alumina with various purity levels, including 99.8% and 99.0%.
The level of purity, grain size, and density required is dependent on the rigors of the application and the
component configuration.
Item | Test Condition | Unit&Symbol | 95% Al2O3 | 99% Al2O3 | 99.7% Al2O3 |
---|---|---|---|---|---|
The main chemical ingredient | Al2O3 | Al2O3 | Al2O3 | ||
Bulk Density | g/cm3 | 3.6 | 3.89 | 3.96 | |
Maximum Use Temperature | 1450°C | 1600°C | 1650°C | ||
Water absorption | % | 0 | 0 | 0 | |
ROHS Hardness | ≥85 | ≥89 | ≥89 | ||
Flexural strength | 20° C | MPa (psi x 103) | 358 (52) | 550 | 550 |
Compressive Strength | 20° C | MPa (psi x 103) | 2068 (300) | 2600(377) | 2600(377) |
Fracture Toughness | K(I c) | Mpa m1/2 | 41734 | 5.6 | 6 |
Coefficient of thermal expansion | 25-1000° C | 1X 10-6/°C | 7.6 | 7.9 | 8.2 |
Coefficient of thermal conductivity | 20° C | W/m °K | 16 | 30 | 30.4 |
Thermal Shock Resistance | Tc | °C | 250 | 200 | 200 |
Dielectricity constant | 1MHz.25°C | 9 | 9.7 | 9.7 | |
Dielectric strength | ac-kV/mm (ac V/mil) | 8.3 (210) | 8.7 (220) | 8.7 (220) | |
Volume Resistivity | 100°C | ohm-cm | > 1013 |