Honesty mig ceramic welding nozzle
Honesty mig ceramic welding nozzle
In welding technology,the mig ceramic welding nozzle has its outstanding advantage compared with other metal and non-metallic materials.
isostatic pressing technology,sintering when the gas pressure is 100Pa. has excellent flexural strength,electrical insulation property and high-pressure shock resistance and thermal shock resistance( when room temperature increases from 20C to 1400C instantaneously,hot and cold cycles repeat many times)
Item | Test Condition | Unit&Symbol | 95%Alumina ceramics | 99%Alumina ceramics |
The main chemical ingredient |
|
| Al2O3 | Al2O3 |
Bulk Density |
| g/cm3 | 3.6 | 3.89 |
Maximum Use Temperature |
|
| 1450°C | 1600°C |
Water absorption |
| % | 0 | 0 |
ROHS Hardness |
|
| ≥85 | ≥89 |
Flexural strength | 20° C | MPa (psi x 103) | 358 (52) | 550 |
Compressive Strength | 20° C | MPa (psi x 103) | 2068 (300) | 2600(377) |
Fracture Toughness | K(I c) | Mpa m1/2 | 4-5 | 5.6 |
Coefficient of thermal expansion | 25-1000° C | 1X 10-6/°C | 7.6 | 7.9 |
Coefficient of thermal conductivity | 20° C | W/m K | 16 | 30.0 |
Thermal Shock Resistance | Tc | °C | 250 | 200 |
Dielectricity constant | 1MHz.25°C |
| 9 | 9.7 |
Dielectric strength |
| ac-kV/mm (ac V/mil) | 8.3 (210) | 8.7 (220) |
Volume Resistivity | 100°C | ohm-cm | > 1013 | > 1014 |
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