Self-bonding Silicon Carbide Bricks

good flexibility

not easy to crack

long service life

large capacity

  Description

β-SiC Bonding Silicon Carbide Brick

β- SiC bonded silicon carbide brick is produced the by the combining of the original SiC particles and β- SiC generated by in-situ reaction of metal silicon powder and carbon powder in raw materials at high temperature,the bonded phase has small grain size and high activity, the oxidation resistance and resistance to water vapor oxidation erosion and mechanical strength is slightly inferior to Si3N4 bonded silicon carbide brick, but other properties are close to both.

Recrystallized Silicon Carbide Brick

Recrystallized silicon carbide brick, also known as R-SiC, is bonded by adding effective surfactant to α-SiC raw material and sintering at high temperature in protective atmosphere to make SiC evaporate and coalesce and recrystallize at the SiC particle bond. It has excellent properties such as high strength at high temperature, light weight, no slagging, good thermal conductivity, less heat storage, long life, etc. It is widely used in ceramics, petrochemical, aerospace and other fields, and is an excellent high temperature engineering material.

  Technical Data:

Items

Specifications

 

β-SiC Bonded SiC

Recrystallized SiC

SiC  %

≥94

≥99

Bulk Density  g/cm3

≥2.63

≥2.65

Apparent Porosity  %

≤17

≤15

CMOR  MPa

≥30

≥90

HMOR  MPa 1400℃

≥30

≥90

CCS  MPa

≥140

≥300

Thermal Expansion Coefficient

 ℃-1 20~1000℃

5.5×10-6

4.8×10-6

Thermal Conductivity

  W/(m·K) 1000℃

≥12

≥20

 

  Application:

Silicon carbide bricks can be divided into oxide bonded (clay bonded, mullite bonded, SiO2 bonded), nitride bonded (Si3N4 bonded, Sialon bonded), self bonded (β-SiC bonded and recrystallized silicon carbide) and silicon infiltration reaction sintered silicon carbide bricks according to the bonding method.

Silicon carbide bricks are advanced refractory materials made of SiC as the main raw material, with a series of excellent properties such as high strength at normal temperature and high temperature, large thermal conductivity, small thermal expansion coefficient, good thermal shock resistance, excellent high temperature wear resistance, and strong resistance to chemical erosion, etc. Widely used in steel industry, non-ferrous metallurgy, petrochemical industry, electric power, ceramics and aerospace fields.

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