Alumina Ceramic Products Wear resistance and high temperature resistance Ceramic range hood purifier
Alumina Ceramic Products Wear resistance and high temperature resistance Ceramic range hood purifier
product name:alumina ceramics
Aluminum oxide ceramic (Al2O3) is a common ceramic material that has the following advantages:
-High melting point: The melting point of alumina ceramics is 2050 degrees Celsius, which is nearly 900 degrees Celsius higher than that of zirconia based materials and can maintain stability at higher temperatures- High hardness: The hardness of alumina ceramics is 9.0-9.5 (Mohs hardness), which is 1.5-2.0 higher than that of zirconia based materials and can resist high-speed erosion and wear- Corrosion resistance: Aluminum oxide ceramics have good chemical inertness and are not easily reactive with acids, bases, salts, and other substances, nor are they easily corroded by oxides in water or air- Matching: The thermal expansion coefficient of alumina ceramics is 6-9 × 10 ^ -6 ^/℃, with good compatibility with high-temperature alloys, can reduce stress and cracking caused by temperature changes. Based on the above advantages, alumina ceramics have broad application potential in the field of thermal barrier coatings, mainly including the following aspects:
-As a ceramic insulation layer material, compared with zirconia based materials, it can improve the high-temperature stability, wear resistance, and corrosion resistance of coatings, and extend the service life of coatings.
products index:
| Ceramic characteristic table | |||
| name | 99% AL2O3 | 95% AL2O3 | |
| physical propertyessential component | essential component | AL2O3≥99% | AL2O3≥95% |
| Density(g/cm3) | 3.85 | 3.6 | |
| water absorption% | 0 | 0 | |
| sintering temperature | 1690 | 1670 | |
| material characters | Hardness(HV) | 1700 | 1600 |
| break off strength | >6500 | >2900 | |
| compressive strength | 30000 | 25000 | |
| thermal response | maximum service tempera- ture | 1500 | 1400 |
| thermal expansion coefficient | 8 | 7.8 | |
| 10-6/℃ | |||
| 0-1000℃ | |||
| Heat shock resistance T(℃) | 200 | 220 | |
| thermal conductivity W/m.k | 31 | 22 | |
| electrical specification | volume resistivity Ω.cm | >1012 | >1012 |
| Insulation destructive power KT/m | 18 | 16 | |
| dielectric constant 1MHZ(E) | 9.2-10.5 | 9.0-10 | |
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