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Your Position: Home > Refractories > Fused Silica
Fused Silica

Fused Silica

It features an extremely low coefficient of thermal expansion with excellent thermal shock resistance, high purity (Grade A: SiO₂ ≥ 99.95%), good electrical insulation, low thermal conductivity, acid and alkali corrosion resistance, Mohs hardness of 7.
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Description
Specification
Application
Packaging

Product Description

Fused Silica is an amorphous silicon dioxide material produced by melting high-purity natural quartz at temperatures, followed by rapid cooling. It features an extremely low coefficient of thermal expansion with excellent thermal shock resistance, high purity (Grade A: SiO₂ ≥ 99.95%), good electrical insulation, low thermal conductivity, acid and alkali corrosion resistance, Mohs hardness of 7, and its phase transition property facilitates shell removal in casting.
Fused Silica

Specification

ItemUnit Grade A Grade BGrade C
SiO2%99.95% min99.85% min99.50% min
Al2O3ppm200 max300 max500 max
Fe2O3ppm45max200 max300 max
K2Oppm45 max60max100 max
Grain Sizemm0-60mm、0.3-0.7mm、0.1-0.3mm or customized
Fine Powdermesh100-325、325-0、500、800、1250、1500 or or customized

Application

It is primarily used in precision investment casting (replacing zircon flour) and refractories.
Electronics and semiconductor industry

Electronics and semiconductor industry

In optics

Quartz glass, optical fibers, and advanced equipment such as gravitational wave detectors

Functional filler

Playing important roles in photovoltaics and aerospace sectors.

Packaging

Packaging can be configured to match handling, storage and shipment requirements. Available options may include:
Bulk bags: 1,000 kg, 1,250 kg or 1,350 kg, supplied with or without pallets.
Small bags: 20 kg or 25 kg plastic or paper bags, supplied with or without pallets.
Custom packaging: Alternative bag types, net weights, palletization and markings are available on request.

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