Multi bore ceramic protection tube for thermocouple
1.Material:AL2O3 85%-99.5%
2.inside diameter = 0.3-2mm ,Outside diameter=1.0-8mm ,lenght=100-2200mm
1.Material:AL2O3 85%-99.5%
2.inside diameter = 0.3-2mm ,Outside diameter=1.0-8mm ,lenght=100-2200mm
3.Maximum temperature 1800 degree ,working temperature 1650 degree
4.Feature :Great mechanical strength ,good resistance to thermal impact ,good insulation and highfrequency characteristics under high temperature ,breakdown volage and volume resistance and selfreactance are great and thermal expansion coefficient is small .
| Material | 85 Al2o3 | 90 Al2o3 | 95 Al2o3 | 99 Al2o3 |
| Al2o3 | 85% | 90% | 93% | 99.30% |
| Fe2o3 | ≤ 1.0 | ≤ 0.5 | ≤ 0.5 | ≤ 0.3 |
| Desnsity: g / cm3 | 3.4 | 3.5 | 3.6 | 3.85 |
| Vickers Hardness | ≥ 8.6 | ≥ 8.8 | 9 | 9 |
| Water Absorption:% | ≤ 0.2 | ≤ 0.1 | ≤ 0.085 | ≤ 0.01 |
| Refractoriness:°C | 1580 °C | 1600 °C | 1650 °C | 1800°C |
| Flexural Strength:Mpa | 180 | 200 | 240 | 280 |
|
Wear Rate( at room temperature,
erosion, 100 grinding)%
|
≤ 3 | ≤ 2.5 | ≤ 1 | ≤ 0.5 |
| Feature | Application | Main usage |
| 1.Great mechanical strength |
Electric appliance industry
Automotive industry
|
1.Heat treatment furnace
and toughened furnace
|
| 2.High softening temperature | ||
|
3.Good resistance to thermal impact |
||
|
4.Small thermal expansion coefficient |
Mechanical industry
Engineer industry
|
2.Inner liner tube and
heating
tube in electric furnace
|
|
5.Good chill and abrupt heat properties |
||
|
6. Resistance to acid and alkali corrosion |