What is SiC silicon carbide tube?

SiC (silicon carbide) protection tube is a type of ceramic tube used to protect temperature sensors from damage in harsh environments, particularly at high temperatures and in corrosive atmospheres.

SiC protection tubes are made from a composite material of silicon and carbon, which provides excellent mechanical strength, thermal conductivity, and resistance to corrosion and oxidation.

Silicon carbide protection tube is silicon carbide products for Industrial and Sintering Applications, with high-strength properties comparable to diamond.

Silicon carbide tubes properties

Silicon carbide protective tube is an ideal high performance material, the most commendable properties of this material are as follows:

  • It can withstand high temperature of 2000℉ without significant reduction in material strength
  • Good thermal shock resistance
  • Universal corrosion resistance. The product is resistant to acid and alkali corrosion. It is an ideal substitute for domestic chemical industry
  • Its high thermal conductivity is five times that of stainless steel
  • Special wear resistance — 1.5 times of tungsten carbide
Sic silicon carbide thermocouple protection tube
Sic Silicon Carbide Thermocouple Protection Tube

The products have the characteristics of high flexing strength at elevated temperatures, high thermal shock resistance. High corrosion resistance and high thermal conductivity, high resistivity against alkalis.

Silicon Carbide Tube Specifications

Available Tube Diameter: 3/4″ to 9″ for American size and 20 mm to 150 mm for metric unit.

  Recrystallized SiC Sintered SiC Reaction Bonded SiC
Purity of Silicon Carbide 99.5% 98% > 88%
Max. Working Temp. (`C) 1650 1550 1300
Bulk Density (g/cm3) 2.7 3.1 > 3
Appearance Porosity < 15% 2.5 0.1
Flexural strength (MPa) 110 400 380
Compressive strength (MPa) > 300 2200 2100
Thermal expansion (10^-6/`C) 4.6 (1200℃) 4.0 (< 500℃) 4.4 (< 500℃)
Thermal conductivity (W/m.K) 35~36 110 65
Main characteristics High temp. High resistance.
High purity
Fracture Toughness Chemical Resistance

Recrystallization and reaction sintering silicon carbide tubes

Silicon carbide protective tube includes two kinds of recrystallization and reaction sintering.silicon carbide reaction sintering can be up to 1300 degrees.

Recrystallized products are produced at 2200 degrees of high temperature,it can withstand 1800 degrees of high temperature and it is also invariable.

It has the characteristics of high compactness, impermeable to water, air permeability, strong bending resistance, acid resistance, alkali resistance, wear resistance, corrosion resistance.

It can be used in copper water, aluminum water, and other alloy solution. It is the best protection of thermocouple.

It can also be used for the protection of silicon carbon rods.


Silicon carbide tubes applications

It has excellent thermal conductivity, low thermal expansion, and is resisitance form acids. Silicon carbide ceramic is excellent for applications requiring good erosion and abrasive resistance.

The products are mainly of kiln furniture in the manufacture of high tension ceramic insulator, construction ceramics, sanitary wares and domestic ceramics.

Also, recystallized carbide refractories are widely used in metallurgy, chemical industries for its unique, excellent properties, the product has up to the advanced intentioned standard.