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Help CenterLow Conductivity Silicate Bonded SiC Fire-proof Silicon Carbide Refractory Castable
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Silicon Carbide Castable
Introduction
Alumina Silicon Carbide Castables, (also be called silicon carbide refractory castables or silicon carbide castables) The silicon carbide castable is made of black SiC raw material. The main crystal phase is AL2O3-SiC-C. The silicon carbide castables do not weaken in high temperature atmosphere and display superior operational properties: the compressive strength is 40–80 MPa at sintering temperature 400°C and 50–85 MPa at 1300°C, the strain onset temperature under a load of 0.2 MPa is 1700–1510°C; thermal stability (1300°C - water) is better than 45 heating/cooling cycles (1300°C - water); Very slight change in linear and volume dimensions was observed on heating. The newly-developed castables can find application in various sectors of industry, in particular, as the refractory material for the lining of Whiting furnaces and porcelain kilns.
Properties
l The more quantative SiC content, the better performance of the alkali resistance
l Silicon carbide in silicon carbide castable is especially advantageous over high temperatures (1100 ℃).
l Partial gaps around the SiC particles can improve the thermal shock resistance and strength of the refractory castable.
l The important chemical properties of silicon carbide are oxidation resistance, corrosion resistance, and the first reaction. When heated to 1000 ° C, the surface of SiC is oxidized and a SiC 2 film is formed. This film hinders the diffusion of oxygen, delays the oxidation rate, protects the silicon carbide covered by the film, improves the service life of the silicon carbide material.
l Because the substrate is SIC, silicon carbide refractories own good wear resistant ability, and high hardness.
l Silicon carbide castable is widely used in abrasives, heating elements, structural ceramics and refractory materials due to its high hardness, electrical conductivity, high temperature resistance and high strength.
Chemical & Physical Index
Item / Model |
XHJASC-1 |
XHJASC-2 |
XHJASC-3 |
XHJASC-4 |
XHJASC-5 |
XHJASC-6 |
XHJASC-7 |
|
Chemical composition(%) |
Al2O3 ≥ |
70 |
55 |
65 |
60 |
55 |
55 |
60 |
SiC+C ≥ |
12 |
25 |
16 |
12 |
10 |
17 |
12 |
|
Bulk density(g/cm3) |
110ºC×24h ≥ |
2.9 |
2.85 |
2.8 |
2.7 |
2.65 |
2.65 |
2.7 |
1450ºC×3h ≥ |
2.85 |
2.8 |
2.75 |
2.65 |
2.6 |
2.6 |
2.65 |
|
Compressive strength (Mpa) |
110ºC×24h ≥ |
22 |
16 |
22 |
21 |
21 |
21 |
22 |
1450ºC×3h ≥ |
56 |
46 |
52 |
46 |
46 |
46 |
52 |
|
Permanent linear change on heating rate1450ºC×3h(%) |
-0.1~0.5 |
-0.1~0.5 |
-0.1~0.5 |
-0.1~0.5 |
-0.1~0.5 |
-0.1~0.5 |
-0.1~0.5 |
|
Characteristics:
l Corrosion resistance
l Good wear resistance
l High thermal conductivity
l High temperature strength
l Good thermal shock resistance
l Low thermal expansion coefficient
l Strong corrosion resistance
l Good anti-oxidation resistance
Application :
Our silicon carbide refractories are widely used in as lining of large aluminum electrolytic cell. The products can also employed to enlarge the tank capacity, enhance the thermal conductivity, alllow rapid cooling and boost up the tank production capacity at the same time. Alumina and cryolite of eutectic content on the surface can protect the tank lining work layer, prolong the tank's service life.
Package
1 ) . In 1MT Big Bag
2 ) . 25KG PP Big Bag In 1MT Big Bag
3 ) . customized packing as required
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