Audited Supplier
Alumina is a very hard and dense material, it exhibits resistance to both high temperature and corrosion with a simultaneous high mechanical strength, which is why it can be used at high temperature applications of up to 1700 °C.
The excellent electrical insulation strength helps aluminum oxide ceramics become a leading material for high voltage applications such as gas ignition.
Almost all shapes are available. In case of dirt adhesion during use, alumina can also be glazed.
The application of aluminum oxide ceramics can be everywhere, it is the aluminum oxide that is the number one in terms of application depth and popularity, like substrates and resistor cores in the electronics industry, thread guides in wire and cable engineering, seal and regulator discs for water taps and valves, heat dissipating elements for lighting systems, protection tubes in thermal processes and catalyst carriers for the chemicals industry.
| Properties | Units | 95% Alumina |
| Physical | ||
| Density | g/cm3 | 3.5 |
| Crystal Structure | hexagonal | |
| Water Absorption | % @R.T. | 0 |
| Hardness | knoop (kg/mm2) | 1175 |
| Hardness | R45N | 78 |
| Mechanical | ||
| Compressive Strength | MPa @ R.T. | 2068 |
| Tensile Strength | MPa @ R.T. | 221 |
| Modulus of Elasticity | Gpa | 303 |
| Flexural Strength (MOR) | MPa @ R.T. | 358 |
| Poisson's Ratio, u | 0.21 | |
| Fracture Toughness, KIc | MPa x m1/2 | 4.5 |
| Thermal | ||
| Max. Use Temperature | oC | 1700 |
| Thermal Shock Resistance | DT (oC) | 250 |
| Thermal Conductivity | W/m-K @ R.T. | 25 |
| Thermal Expansion Coefficient | mm/m-ºC | 8.2 |
| Specific Heat | cal/g-oC @ R.T. | - |
| Electrical | ||
| Dielectric Constant | 1MHz @ R.T. | 9 |
| Dielectric Strength | kV/mm | 8.3 |
| Electrical Resistivity | Wcm @ R.T. | >10^14 |
Q: Are you a factory or trading company?
A: We are a manufacturer. Warmly welcome to visit our factory.
Q: What kinds of products can you make?
A: We are offering products made by 95%/99.5%/99.7% alumina, zirconia and steatite.
Q: Is it available to provide customized products?
A: 90% of our products are custom-made, so your special demands are always welcome.
Q: How soon can I get the price?
A: Nornally, we quote within 24 hours after your full inquiry arrives.
The full inquiry should include a drawing with technology requirements and your purchase quantity.
If you can inform us what is the part used in, that will help to make our quotation more accurate.
Q: How long is your delivery time?
A: Generally it will 21-35 days, but it varies on the different designs and quantities.
Q: Can you provide the free samples?
A: Yes, we would like to offer samples or similar ones for free, but the courier fee be collected.
Q: What is your terms of payment?
A: For the first order, we ask 100% T/T in advance and the balance before shippment.
