Silicon Nitride Thermocouple Protection Tube
Product Description
Thermocouple’s long-time stability and service life will be up to outside protection tube. Thermocouple shielded by silicon nitride thermocouple sheath will quickly react to temperature due to its good thermal conductivity and thinner wall thickness. Silicon nitride thermocouple protection tube is for continuous temperature measurement and protect thermocouple without erosion.
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
Features
1, Moulding: Cold isostatic pressing(CIP)
2, Sintering: GPSN/RSSN
3, High strength and good compactness
4, Low thermal expansion coefficient
5, Excellent thermal shock resistance
6, No wetting by molten aluminum and non-ferrous metal
7, Good corrosion resistance