Si3n4 Bonded Sic Thermocouple Protection Tube for Smelting or Casting of Molten Aluminum, Aluminium Alloys, Magnesium Alloys, Zinc and Copper Alloys.

• Refractoriness (℃): 1580< Refractoriness< 1770
• Feature: Long Time Materials
• Type: Refractory Material
• Shape: Pipe
• Material: Silicon Carbide (SiC)
• Service: Super
• Model NO.: si3n4 tube
• Quality: Better
• Price: Lower
• Transport Package: Polywood Case
• Specification: talk
• Trademark: JIAXIN
• Origin: China
• HS Code: 69039000
• Production Capacity: 100000

Product Description

Nitride Bonded Silicon Carbide Heater Protection Tube
Silicon nitride (Si3N4) bonded silicon carbide (SiC) material is produced by adding industrial silicon paste into artificial aggregate. Under high temperature, Si and N2 reacts with the formula of 2N2+3Si=Si3N4, Si3N4 bonded Sic material is formed by bonding SiC particles tightly. Therefore, Si3N4 bonded SiC material is an excellent refractory with the original properties of SiC. The material has quite high strength even under the temperature of 1700. C has properties of creep deformation resistance and anti-chemical erosion, and has excellent thermal conductivity and wear-resistance.
Comparing with other several bonded SiC materials, Si3N4 bonded SiC material has attracted more and more attention.

Product Feature:

Si3N4 Bonded SiC material 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 side lining of the reduction bath is eroding by aluminum and cryolite (used as additive), but Si3N4 bonded SiC material could not be eroded by aluminum, and do not have 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 have 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 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 to increase the output. Because of the high resistivity of the material, it can reduce the power consumption of the side -wall about 15%, saving energy and protecting environment

 

Our Nitride Bonded Silicon Carbide Heater Protection Tube is designed for smelting or casting of molten aluminum, aluminium alloys, magnesium alloys, zinc and copper alloys.
Also we can supply Si3N4 (SSN, RBSN, G.P.S-SN, HPSN), O'-SiAlON tubes. Please contact us if interested.
Available Size & Types: 
ID max: Φ220 mm, Length max: 1700 mm;
Vertical type (metal flange type, one body type), horizontal type and pencile type.

Applications:
Low pressure die casting and counter pressure die casting of molten aluminum, aluminum alloys, magnesium alloys and copper alloys; zinc smelting. 
Typical chemical analysis: SiC: > 72.00%; Si3N4: >25.00%; Free-Si: < 0.20%; Fe2O3: < 0.15%.

Typical Technical Data:
Porosity: < 11%;
Bulk Density: > 2.60 g/cm3;
Compressive Strength: > 175 MPa;
Flexural Strength: > 70 MPa;
Thermal Conductivity (1400 °C): > 16.5 × 10-6 W/ (m?°C);
Thermal Expansion (20°C-1400 °C): < 4.0 × 10-6/ °C;
Maximum Working Temperature: 1550 °C.

Competitive Advantages of the product a. High density, high mechanical strength; b. Excellent thermal conductivity, low thermal expansion; c. High washing resistance, oxidation resistance, acid resistance and thermal shock resistance; d. Low wettability with the melts, bring minimum impurities to the melts;  e. High cost performance, long service life.
Main Markets/Key Customers	:	india, USA, JP, all over the world