Ads by Google
Wearable ceramic is the special corundum ceramic that been sintered under 1700°C with the main raw material of Al2O3 and flux of rare metal oxide.Using the high strength organic/inorganic bond to felt together,and then grinding to the size as drawing required.
Performance:
1. Big hardness,the ROHS hardness is HRA80-90,just inferior to diamond,the wearable ability is much better than the wearable steel and stainless steel
2. Wearable ability is excellent. Equal to 266 times of manganese steel,171.5 times of high chrome cast-iron.Under the same working condition,can extend the equipment working life at least above 10 times.
3. Light weight,the bulk density is 3.6g/cm3,only half of steel,can alleviate the equipment burthen greatly.
4. Hard adhesived,good heat-resistant.
Main Technical parameters:
Alumina content≥95%
Bulk Density≥3.6 g/cm3
ROHS Hardness HRA≥85
Compressive Strength≥850 Mpa
Fracture Toughness KΙC ≥4.8MPa•m1/2
Bending strength≥290MPa
Coefficient of thermal conductivity :16W/m.K
Coefficient of thermal expansion 7.2×10-6m/m.K
Main application
The exterprises of Eletricity ,steel,smelt,mechanism,colliery,mine,chemical,cement,oil field ,will choose the different products according to their special requirments for the wearable mechanical instruments that works in the system of coal transfer,material transfer,milling,dust removing,and so on.
95%,99%,99.7% Al2O3 Material Parameters:
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 | 1450°C | 1600°C | 1650°C | ||
Water absorption | % | 0 | 0 | 0 | |
ROHS Hardness | ≥85 | ≥89 | ≥89 | ||
Flexural strength | 20° C | MPa (psi x 103) | 358 (52) | 550 | 550 |
Compressive Strength | 20° C | MPa (psi x 103) | 2068 (300) | 2600(377) | 2600(377) |
Fracture Toughness | K(I c) | Mpa m1/2 | 4-5 | 5.6 | 6 |
Coefficient of thermal expansion | 25-1000° C | 1X 10-6/°C | 7.6 | 7.9 | 8.2 |
Coefficient of thermal conductivity | 20° C | W/m °K | 16 | 30.0 | 30.4 |
Thermal Shock Resistance | Tc | °C | 250 | 200 | 200 |
Dielectricity constant | 1MHz.25°C | 9 | 9.7 | 9.7 | |
Dielectric strength | ac-kV/mm (ac V/mil) | 8.3 (210) | 8.7 (220) | 8.7 (220) | |
Volume Resistivity | 100°C | ohm-cm | > 1013 | > 1014 | > 1014 |
ceramic rods