Active Member
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[China]
Address: Wuxi,Jiangsu,China
Contact name:Joana
Atwill international co.,ltd |
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Alumina Ceramic Ring
High-purity Alumina Ceramic Seal Ring
Specifications:
1. High density;
2. High hardness;
3. Low thermal conductivity;
4. Chemical inertness;
5 .Resistance to molten metals;
6. Good Wear resistance;
7. High fracture toughness;
8. Good insulation performance and high temperature resistance.
Chemical Properties:
| Table1: Technical Parameter Of Alumina Ceramics | |||||
| Item | Test condition | Unit& Symbol | 95% Alumina Ceramics | 99% Alumina Ceramics | 99.7% Alumina Ceramics |
| The Main Chemical Ingredient | Al2O3 | Al2O3 | Al2O3 | ||
| Bulk Density | g/cm³ | > 3.6 | 3.89 | 3.96 | |
| Maximum Use Temperature | º C | 1450 | 1600 | 1650 | |
| Water Absorption | % | 0 | 0 | 0 | |
| ROHS Hardness | ≥ 85 | ≥ 89 | ≥ 89 | ||
| Flexural Strength | 20 º C | Mpa(psi*10³ ) | 358(52) | 550 | 550 |
| Compressive Strength | 20 º C | Mpa(psi*10³ ) | 2068(300) | 2600(377) | 2600(377) |
| Fracture Toughness | K(lc) | Mpa m 1/2 | 4-5 | 5.6 | 6 |
| Coefficient Of Thermal Expansion | 25-1000 º C | 1*10 -6 /º C | 7.6 | 7.9 | 8.2 |
| Coefficient Of Thermal Conductivity | 20 º C | W/mk | 16 | 30.0 | 30.4 |
| Thermal Shock Resistance | Δ Tc | º C | 250 | 200 | 200 |
| Dielectricity Constant | 1MHz. 25 º C | 9 | 9.7 | 9.7 | |
| Dielectricity Strength | ac-kV/mm(ac V/mil) | 8.3(210) | 8.7(220) | 8.7(220) | |
| Volumn Resistivity | 100 º C | ohm-cm | > 1013 | > 1014 | > 1014 |
Applications:
1, ceramic shaft for aquatic animals equipment filter pump
2, Ceramic plunger for high pressure cleaner.
3,Wearlessness,resistant acid-base and high intensity ceramic
assembly apply to petroleum ,chemical and chemical industry.
4,Wearlesness, corrosion resistance, thermostable parts apply to
precision machine.
