Pump Seal 1800HV Alumina Ceramic Disc 3.9g/Cm3
Advanced High Purity Alumina Ceramic Round Disc
Description:
Aluminium Oxide is the most widely applied and cost effective technical ceramic material. It offers a combination of superior mechanical strength and electrical properties, wear resistance and corrosion resistance. The maximum working temperature is up to 1700 °C with relatively high thermal conductivity. It is also an electrically insulating material with a high electrical resistivity. The good corrosion resistance makes it insoluble in water and slightly soluble in strong acid and alkaline solution.
Technical Parameters:
| Mechanical behavior | Unit | Al2O3 | SiC | Si3N4 | ZrO2 |
| Colour | ———— | Light yellow | Black | Black | White,Black |
| Density | g/cm3 | 3.95 | 3.15 | 3.2 | 6 |
| Bending strength | MPa | 300～400 | 400～500 | 800～1200 | 950～1200 |
| Elastic modulus E | GPa | 380 | 350 | 300-320 | 210 |
| Poisson's ratio | 0.22 | 0.14 | 0.26 | ||
| Hardness | Hv | 1800 | 2000～2500 | 1400～1700 | 1100～1300 |
| HRC | 80 | 85～90 | 75～80 | 70～75 | |
| Fracture toughness | MPa·m1/2 | 3.0～4.0 | 3.0～4.0 | 5.0～7.0 | 8.0～10.0 |
| Maximum use temperature | ℃ | 1000 | 1300 | 400 | 400 |
| Thermal expansion coefficient | 10-6/℃ | 8.4 | 4 | 3.3 | 10.3 |
Advantages:
• Excellent fracture toughness;
• High mechanical strength;
• Very good wear resistance;
• High corrosion stability;
• Low thermal conductivity;
• High using temperature;
Application:
Ceramic sealing discs are widely used in a variety of water faucets, water taps, sanitary sealing systems, regulating systems, sealing valves, water /oil/gas pumps, and so on.
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