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Smooth Surface Silicon Nitride Tube , Bonded SiC Thermocouple Ceramic Tube

Smooth Surface Silicon Nitride Tube , Bonded SiC Thermocouple Ceramic Tube

Smooth Surface Silicon Nitride Tube , Bonded SiC Thermocouple Ceramic Tube

Product Details:

Place of Origin: China
Brand Name: Brother Furnace
Certification: CE
Model Number: BR

Payment & Shipping Terms:

Minimum Order Quantity: 1 Set
Price: Negotiation
Packaging Details: Strong wooden box for global shipping
Delivery Time: 3-21 Working days
Payment Terms: L/C, T/T, Western Union
Supply Ability: 10000 pcs per month
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Detailed Product Description
Density: 2.8 G/cm3 Porosity: ≤16%

Si3n4 Thermocouple Protection Tubes, Silicon Nitride Protection Tubes



Silicon Nitride (Si3N4) Bonded SiC thermocouple protection tube is mainly used in the production of aluminum, copper, and zinc, as the lining material of the molten pool and electrolytic bath (reduction bath). The sidelining of the reduction bath is eroding by aluminum and cryolite (used as an additive), but Si3N4 bonded SiC material could not be eroded by aluminum, and do not have a chemical reaction with cryolite. So this kind of material is ideal for the lining bricks of the electrolytic bath. In particular, this kind of bricks has the excellent properties of high strength, abrasive resistance and nonconductive, so the copolymer (Al2O3 and Cryolite). The copolymer likes protective film to protect the working lining and improve the service life of the electrolytic bath. At the same time, the Si3N4 bonded SiC bricks have lower thermal conductivity than silicon bricks, so they can reduce the thickness of the side wall or input higher power to expanse the loading capacity of the electrolytic bath, and increase the output. Because of the high resistivity of the material, it can reduce the power consumption of the side -wall by about 15%, saving energy and protecting the environment.


  • Best producing technology in China. Our tubes can be instead of Japanese tubes in Aluminium melt furnace.
  • Very smooth surface to avoid any blotted metal liquid.
  • Good thermal conductivity.
  • High temperature strength.
  • Special groove to be easily fixed.

Smooth Surface Silicon Nitride Tube , Bonded SiC Thermocouple Ceramic Tube


Si3n4 Thermocouple Protection Tubes Technical Specifications

Density 2.8 g/cm3
Porosity ≤16%
Phase composition ß-Si3N4, Oxide
SIC 72%
Si3N4 21%
compressive strength 140MPa
flexure strength 35MPa
Thermal conductivity 16 w/m*k



Silicon Nitride Protection Tubes Standard size (in stock):


  • OD28 x ID16 x Length 200-1500mm
  • OD45 x ID25 x Length 200-2000mm
  • OD50 x ID25 x Length 200-2000mm

Other Size: Customizable according to your requirement



If you're interested in our Si3n4 Thermocouple Protection Tubes, Silicon Nitride Protection Tubes, contact us now to get a quote!


Contact Details
Zhengzhou Brother Furnace Co.,Ltd

Contact Person: li

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Zhengzhou Brother Furnace Co.,Ltd
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