Fused Silica

99.8% SiO₂ Low Conductivity Thermal Stability Lumps / Granules / Powder

High-purity fused quartz sand made from fused quartz blocks — graded, purified, crushed, screened, and magnetically separated into precise specifications for crucibles, technical ceramics, refractories, and fine casting.

SiO₂99.8% min (grains) / 99.7% min (powders)
True S.G.2.21
Mohs Hardness7.0
FormsLumps, granules, powders
Packing1200 / 1250 kg jumbo bags on pallet

Request a Quote Technical Data

Product Description

We use fused quartz blocks as the raw material, then process them through grading, impurity removal, crushing, screening, and magnetic separation to produce fused quartz sand in various specifications, tailored to specific applications.

The product exhibits low thermal conductivity, good thermal stability, and a consistent particle size distribution. It is primarily used as a raw material for crucibles, technical ceramics, refractories, and fine casting.

Main Applications

Chemical Composition

Component	Specification
SiO₂	99.8% min (grains), 99.7% min (powders)
Al₂O₃	< 500 ppm
Fe₂O₃	< 300 ppm
Na₂O	< 100 ppm
K₂O	< 100 ppm

Physical Properties

Property	Value
Appearance	Colorless, transparent lumps, granules, or white powder
True Specific Gravity	2.21
Mohs Hardness	7.0
pH Value	6.0

Available Particle Sizes

Supplied as lumps, granules, and powders in a wide range of specifications:

Packaging

Jumbo Bags

1200 kg or 1250 kg

On pallet

Custom

Specs & packing on request