Fused Silica Powder First Grade, aslso Called Silicon Dioxide, with High Purity and Whiteness Sio2 99.9% as Refractory Raw Materials (325 Mesh, 200 Mesh,120Mesh)

Short Description:

Also Know as A grade with high purity with Sio2 around 99.7%-99.99%.

We choose high purity quartzite from Donghai and Xinyi areas as raw material. After acid washing treatment, the crystalline silica is transformed into amorphous silica with a small amount of impurities in a resistance furnace at a high temperature of 1700ºC. After special mechanical processing, screening, iron removal and other picking treatments, the high purity quartzite is formed into lumps, granules and powdered products.

Product Detail

Product Tags


1. Near zero thermal expansion, extremely low thermal conductivity.
2. Excellent thermal stability.
3. High purity (the SiO2 content is above 99.8%).
4. Chemical properties are stable.
5. General mechanical production, particle size for angle type.


II. Main Areas of Application

The Fused silica powder mainly used in electronic sealing,paint,coating,Silican rubber,investment casting and high-grade electrical insulation and so on. High grade quartz nozzle,Filling materials including epoxy resin casting, electronic sealing,paint, coating,etc.


III. Basic Parameters

Bulk Density :2.2 g/m3
Hardness :7
Softening Point :1700°C
Melting Point :1750°C
Coefficient of Thermal Expansion :0.1
PH value :6


IV. Chemical Composition

Guaranteed Value Typical Values
SiO2 99.7%min 99.91%
Al2O3 500ppmmax 360ppm
Fe2O3 500ppmmax 150ppm

V. Availability Specifications

1. Block 0-60 mm
2. Granular

8-5mm 5-3mm 3-1mm 1-0mm
20-40 mesh 40-70 mesh 70-120 mesh  0.1-0.2mm

We are a quartz company which is one of the leading producing,grinding,crushing and exporting of quartz materials in Xuzhou China.
We have over 10 years production experience in precision casting and refractory materials.
We also offer a modified specification upon client requirement,Can be produced customized size and specifications to customer granularity requirements,

◆Products feature

1.With lower dielectric constant; Higher purity, better electrical insulation performance, high whiteness; Very low coefficient of thermal expansion;
2.More stable chemical properties,excellent acid and alkali resistance, corrosion resistance, weather resistance.

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