A grade Fused Silica Block First Grade Transparent Lump with High Purity Sio2 99.9%,Characterized by Excellent thermal Shock Resistance in Fused silica Ceramic Products. (0-50Mesh,5-3Mesh,3-1Mesh)

Short Description:

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

High-purity quartzite from Donghai and Xinyi areas is selected as raw material. After acid washing treatment, the crystalline silica is transformed into non-crystalline silica with small amount of impurities under the high temperature of 1700ºC in the resistance furnace. 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 Blcok are 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. General Block size: 0-60 mm,5-3mm,3-1mm,1-0mm
2. Granular(General size of Fused silica sand)

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, one of the leading quartz material manufacturing, grinding, crushing and exporting company in Xuzhou, China.
We have over 10 years of experience in precision casting and refractory production.
We can also provide modified specifications according to customer's requirements and can produce customized sizes and specifications according to customer's 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 and weather resistance.

  • Previous:
  • Next:

  • Write your message here and send it to us