Silica bricks

Silica bricks are a type of refractory brick that are primarily composed of silica (SiO2) as the main raw material.

These bricks are known for their high resistance to thermal shock, excellent insulating properties, and ability to withstand very high temperatures.

Features of Silica bricks

The main advantages of silica refractory bricks include:

  • High thermal stability: Silica has a high melting point and can withstand extreme temperatures without deformation or cracking.
  • Good resistance to thermal shock: Silica refractory bricks have low thermal expansion and high thermal conductivity, allowing them to withstand rapid temperature changes without damage.
  • Excellent resistance to corrosion: Silica is highly resistant to most chemicals, acids, and alkalis, making silica refractory bricks suitable for applications where they may come into contact with corrosive materials.
  • Low thermal conductivity: Silica refractory bricks have low thermal conductivity, which means they can effectively insulate heat and reduce heat loss.

Silica brick shapes and sizes

Silica bricks come in various shapes and sizes, including standard shapes like rectangular, arch, and wedge, as well as custom shapes to meet specific requirements.

They are typically light gray or white in color and have a smooth surface finish.

These bricks can be easily cut, shaped, and joined to form linings and structures that can withstand the harsh environments of high-temperature industrial processes.

Applications of Silica bricks

Silica bricks are commonly used in various industrial applications where they are exposed to extreme heat, such as in furnaces, kilns, and chimneys.

They are particularly favored in the glass, ceramics, and cement industries due to their ability to maintain their physical and chemical properties under intense heat conditions.

Silica brick production process

The manufacturing process of silica bricks involves carefully selecting and proportioning high-quality silica raw materials, which are then mixed, molded, and fired at extremely high temperatures.

This process ensures the bricks’ exceptional resistance to thermal shock and the absence of impurities that could compromise their properties.

Overall, silica bricks are highly valued in industries that require durable, heat-resistant, and insulating materials.

Their ability to withstand extreme temperatures, excellent insulation properties, and mechanical strength make them an essential component in the construction of furnaces, kilns, and other high-temperature applications.

Technical Data

SiO2 %≥94≥95≥96≥96
Fe2O3 %≤1.5≤1.5≤0.8≤0.7
Al2O3+TiO2+R2O %≤1.0≤0.5≤0.7
Refractoriness ℃1710171017101710
Apparent Porosity %≤22≤21≤21≤21
Bulk Density g/cm3≥1.8≥1.8≥1.8≥1.8
True Density,g/cm3≤2.38≤2.38≤2.34≤2.34
Cold Crushing Strength Mpa≥24.5≥29.4≥35≥35
0.2Mpa Refractoriness Under Load T0.6 ℃≥1630≥1650≥1680≥1680
Permanent Linear Change On Reheating(%)1500℃X2h0~+0.30~+0.30~+0.30~+0.3
20-1000℃ Thermal Expansich10-6/℃
Thermal Conductivity (W/MK) 1000℃1.741.741.441.44

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