Wuhan Global Metal Engineering Co., Ltd
Wuhan Global Metal Engineering Co., Ltd The pioneer manufacturer of heaters & sensors
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Thermocouple Alumina Thermocouple ceramic Insulator
Description:
Applications of Thermocouple Insulator:
Alumina is the best-known advanced ceramic material, is widely used in automotive, petro-chemical, fluid control,material transfer, Industry,electrical and electronic, semiconductor.Sapphire is single-crystal alumina.
Alumina ceramic is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness.
Advantage of Thermocouple Insulator:
1. Excellent electrical insulation
2. High hardness
3. Relatively low strength and fracture toughness
4. Resistance to wear and corrosive
5. Excellent thermal stability
6. Resistance to high temperatures
7. High electrical resistivity
8. Good chemical stability and resistance
9. High corrosion resistance
10.Excellent thermal shock resistance
11.High thermal insulation
The specification of Thermocouple Insulator:
| Material | Unit | Al2O3-99.% | Al2O3-99% |
| Items | |||
| Al2O3 | % | 99.7 | 99.3 |
| SiO2 | % | <0.1 | — |
| Density | g/cm3 | 3.95 | 3.88 |
| Water Absorption | % | 0 | 0.01 |
| Flexural Strength | Mpa | 450 | 350 |
| 20°C Leakage rate | Torr/L.sec | <10-11 | <10-11 |
| High Temperature Curve | mm | 1700°C 0.2mm is allowed | 1600°C 0.2mm is allowed |
| High Temperature Bonding | 1700°C Not | 1700°C Not | |
| 20~1000°C Coefficient of Linear Thermal Expansion | mm.10-6/°C.m | 8.6 | 8.2 |
| Thermal Conductivity | W/m.K | 25 | 25 |
| Breakdown Voltage | KV/mm | 20 | 20 |
| 20°C DC Volume Resistivity | Ohm/cm | 1014 | 1014 |
| High Temperature Volume Resistivity | 1000°C MΩ | ≥0.08 | ≥0.08 |
| 1300°C MΩ | ≥0.02 | ≥0.02 | |
| 1550°C Thermal Shock | — | Did not crack in 6 times cycle at 1550°C | Did not crack in 6 times cycle at 1550°C |
| Limit of Application | °C | 1900 | 1800 |
| Max Manufacturing Length for Tube | mm | 1600 | 1600 |
