Sialon Syalon Si3n4 Ceramic Thermocouple Tube Thermocouple Sheath

Silicon nitride thermocouple protection tube usually made by CIP (cold isostatic pressing) / RB(reaction bonded) , both are have excellent abrasion resistance and corrosion resistance , and can be used under 1400°C .

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-1000ºC) 3.2 2.8
Max temperature In air 1400ºC 1400ºC
Hardness(HRA) >92 >85

1, Moulding: Cold isostatic pressing(CIP)

2, Sintering: GPSN/RSSN

3, High strength and good compactness

5, Excellent thermal shock resistance

6, No wetting by molten aluminum and non-ferrous metal

OD(mm) ID(mm) Length(mm)
16 8 300-750
22 12 300-900
28 16 300-1600
30 18 300-1600
45 25 300-1600

We can also produce other sizes according to your drawing.

Widly used in aluminium alloy casting ,non-ferrousmetal metallurgy ect.

Polyfoam filled, plywood box outside and according to your requirements.

7.Other related Thermocouple protection tubes.

Other thermocouple tubes.

1. Alumina Al2I3 tubes