Applications
Fused Silica Applications Across High-Temperature Industries
Fused Silica is widely used in high-temperature, high-purity, and thermal-shock-resistant applications.
Thanks to its low thermal expansion, excellent thermal stability, and high SiO₂ purity, fused silica is an ideal material for demanding industrial environments.
At ZNH Refractories, we supply fused silica materials for a wide range of industrial applications, including foundry casting, refractory manufacturing, thermal insulation, and glass furnace maintenance.
Foundry Casting
Fused silica is extensively used in iron and steel foundries due to its outstanding thermal shock resistance and low expansion rate.
Typical uses include:
Foundry coatings and facing sands
Molding and core materials
High-temperature casting processes
Benefits:
Reduced veining and cracking
Improved surface finish
Stable performance at high temperatures
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Investment Casting
In investment casting, fused silica is a critical raw material for ceramic shell systems.
Typical uses include:
Primary and backup slurry systems
Stucco sands
Precision casting of complex components
Benefits:
Excellent dimensional stability
Smooth casting surfaces
High purity and consistent grain distribution
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Refractory Materials
Fused silica is widely used in the production of acidic and neutral refractories for high-temperature furnaces.
Typical uses include:
Ramming mass
Castables and mortars
Furnace linings and repair materials
Benefits:
High refractoriness
Low thermal expansion
Good resistance to thermal cycling
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Thermal Insulation
Due to its low thermal conductivity and high temperature resistance, fused silica is an excellent choice for thermal insulation products.
Typical uses include:
Lightweight insulation boards
High-temperature insulation fillers
Industrial furnace insulation systems
Benefits:
Energy efficiency
Long service life
Stable insulation performance at high temperatures
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Glass Furnace Repair
Fused silica is commonly used in glass furnace repair and maintenance, especially in areas exposed to extreme heat.
Typical uses include:
Hot repair materials
Furnace patching compounds
Glass contact zones
Benefits:
High chemical purity
Excellent thermal shock resistance
Compatibility with glass melts
👉 View Glass Furnace Repair Applications