Fine Si3N4 bonded SiC High Temperature thermocouple protecting tubes is a sort of structure ceramic material, NSiC product is shaped by casting with the composition of high pure SiC and Si powder, and sintered through nitrified reaction.
NSiC has higher strength than RSiC and has excellent oxidation resistance. Maximum working temperature is 1500deg.In addition to its structural properties, NSiC has excellent wear properties and is resistant to corrosion and erosion by molten metals. So High Temperature thermocouple protecting tubes can be used in direct contact with molten aluminum, zinc, copper, magnesium. NSiC thermocouple protecting tubes has been successfully used for protection tubes for temperature measurement.
NSiC offer many engineering property levels that are not found in other refractory materials, such as high strength at using temperature, excellent load bearing strength and resistance to chemical and abrasive attack.
Characteristic Of High Temperature Thermocouple sheath :
1. Excellent oxidation resistance
2. Good wear resistance
3. Excellent corrosion resistance
4. High temperature flexural performance
5. Excellent load bearing strength
The Data Sheet Of High Temperature Thermocouple sheath
Bulk Density: 2.75-2.82g/cm3
Porosity: 10-12%
Compression Strength: 600-700Mpa
Bending Strength: 160-180Mpa
Young’s Modulus: 220-260Gpa
Thermal Conductivity: 15W/MK
Thermal Expansion α（20-1000℃）: 5.0x10-6k-1
Max. Working Temperature: 1500℃
Si3N4: 20-40%
SiC: 60-80%
