Supply Insulating Alumina Ceramic Dowel Aluminum Oxide Ceramic Tube
Alumina is an electrically insulating material, with a high
electrical resistivity, increasing with purity. Good chemical
stability of alumina leads to high corrosion resistance. It is
insoluble in water and only slightly soluble in strong acid and
alkaline solutions.
Alumina ceramics have the same sintered crystalline body as
sapphire and ruby. One of the main uses of alumina ceramic is as an
insulation material for electrical components. In other
applications, it is used for its exceptional strength and corrosion
and wear resistance.
Manufacturing:
| Size | Customize by drawings or samples |
| Material | 95%, 99% aluminum oxide |
| Lead time | Usually 20-30 days |
| FOB port | Shanghai port |
Characteristics of alumina ceramics:
- Good strength and hardness
- High temperature resistance
- Good corrosion resistance
- Electrical insulation
- Wear resistant
Specifications:
| Properties | Item | Unit | 99% Alumina | 95% Alumina |
| Mechanical Property | Color | -- | Light Yellow | White |
| Mechanical Property | Density | g/cm3 | 3.85 | 3.6 |
| Mechanical Property | Bending Strength | MPa | 310 | 300 |
| Mechanical Property | Compressive Strength | MPa | 2400 | 2300 |
| Mechanical Property | Elastic Modulus | GPa | 340 | 320 |
| Mechanical Property | Fracture Toughness | MPam1/2 | 3-4 | 3-4 |
| Mechanical Property | Weber Coefficient | m | 12 | 12 |
| Mechanical Property | Vickers Hardness | HV0.5 | 1600 | 1400 |
| Thermal Property | Coefficient of Line Thermal Expansion | 10-6K-1 | 7-8 | 7-8 |
| Thermal Property | Thermal Conductivity | W/mK | 29 | 20 |
| Thermal Property | Thermal Shock Resistance( in water) | ΔT℃ | 200 | 250 |
| Thermal Property | Max Working Temperature | ℃ | 1600 | 1500 |
| Electrical Property | Volume Resistance at 20℃ | Ωcm | >1014 | >1014 |
| Electrical Property | Dielectric Strength | V/m | 15X106 | 15X106 |
| Electrical Property | Dielectric Constant | εr | 10 | 9 |
99% Alumina Insulating Ceramic
FAQ:
1. Are you a factory?
Yes, we're a factory professinally producing industrial ceramics.
Our main products are alumina ceramics, zirconia ceramics and sic
ceramics.
2. What's the size of it?
Products are always customized according to drawings or samples.
Diameter and height within 500mm are available.
3. What's the price for it?
It depends. Prices are caculated by the drawing size and structure.
4. What's the production process?
Our products are made mainly in cold isostatic pressing, dry
pressing and hot press moulding technique.
5. How about the delivery?
Generally speaking, a ceramic production needs about 30 days to
finish. Some special products maybe take a longer time. For some
simple products, maybe 10-15 days is ok.
6. How's the packing?
The usual packing is cartons, wooden cases, or pallets. Ceramics
are fragile products, will use some breakage-proof materials to
protect them.
7. Can you do the finish maching?
Yes, we have lathes, grinding machines, milling machines,
carves-milling machines to make sure products' accuracy.
