Categories: Themocouple Protection Sheath
(Si3N4) Silicon nitride thermocouple protection tube usually made by CIP（gas pressure sintering silicon nitride) (cold isostatic pressing) / RB(reaction bonded) , both are have excellent abrasion resistance and corrosion resistance , and can be used under 1400°C .
- Si3N4 Thermocouple Protection Tube Details:
Silicon nitride thermocouple protection tube usually made by CIP（gas pressure sintering silicon nitride) (cold isostatic pressing) / RB(reaction bonded) , both are have excellent abrasion resistance and corrosion resistance , and can be used under 1400°C .
- Physical and chemical index
| Types | GPSN | RSSN |
| Density | >3.2g/cm3 | >2.4g/cm3 |
| Si3N4 content | >92% | >92% |
| Flexural strength | >600Mpa | >200Mpa |
| Compressive strength | >1500Mpa | |
| Thermal conductivity(W/mk) | >22 | >14 |
| Porosity | 0 | <15% |
| Thermal expansion coeff.(RT-1000℃) | 3.2 | 2.8 |
| Max temperature In air | 1400℃ | 1400℃ |
| Hardness(HRA) | >92 | >85 |
3. Features
- Moulding: Cold isostatic pressing(CIP)
- Sintering: GPSN/RSSN
- High strength and good compactness
- Low thermal expansion coefficient
- Excellent thermal shock resistance
- No wetting by molten aluminum and non-ferrous metal
- Good corrosion resistance
4. Recommended Sizes
| OD(mm) | ID(mm) | Length(mm) |
| 16 | 8 | 300-750 |
| 22 | 12 | 300-900 |
| 28 | 16 | 300-1200 |
| 30 | 18 | 300-1000 |
| 45 | 25 | 300-1000 |
We can also produce other sizes according to your drawing.
5. Application:
Widly used in aluminium alloy casting ,non-ferrousmetal metallurgy ect.
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