NICARB – Thermocouple Protection Tubes
Material
Nitrite bonded Silicon Carbide (without steel inner tube)
Applications:
Non-ferrous metals such as aluminium, brass, copper and copper alloys.
Max. temperature:
up to 1500 °C
Connection:
with flange, groove or plane at the open end.
Types:
CERN-(+length in centimetres) for thermocouple protection tubes
CERN-HT-(+length in centimetres)-COE for immersion heater tubes
CERN-HT(+length in centimetres)-OBE for radiant heater tubes open both ends
Applications:
thermocouple protection tubes
Made by high-pressure isostatic compaction techniques and subsequent high temperature nitridation, NICARB, silicon nitride bonded silicon carbide thermocouple protection tubes are of premium quality. Their life span potential in many applications, where mechanical damage is minimal, makes them very economical. Where good practices prevail, these long life protection tubes are the most economical.
Thermal, mechanical and physical properties:
| Properties | Value | Unit |
| Silicon carbide content | 78 – 81 | % |
| Si3N4 | 19 – 22 | % |
| Maximum temperature | 1500 | °C |
| Open porosity | 18 – 22 | Vol.-% |
| Raw density | 2,58 | kg/dm3 |
| Compressive strength (at 20 °C) | 85 – 100 | N/mm2 |
| Bending strength (at 1400 °C) | 20 – 30 | N/mm2 |
| Fire resistance | >38 | SK |
| Thermal conductivity (at 1100 °C) | 8 | W/mK |
| Thermal extension coefficient (20 - 1100 °C) | 4,5 | K-1 x 10-6 |
| Average specific heat (20 – 1100 °C) | 1050 | J/kgK |
| Temperature exchange resistance | excellent |
The given values are only valid for the tested samples and therefore only to be used as indication values.