Fused Silica Second Grade (also known as A)
High purity quartz stone in Lianyungang and Xuzhou area was selected as raw material. After pickling treatment, the crystalline silica was transformed into amorphous silica with a small amount of impurity at 1800ºC high temperature in the resistance furnace. After special mechanical processing, screening, iron removal after the formation of blocks, particles and powder products.
I. Characteristics
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. Special machinery production, particle size close to circular, large packing density, stable particle size distribution.
II. Main Areas of Application
Quartz nozzle, quartz crucible for steel industry
Shell-making materials in precision casting
Multi-space cellular ceramics in environmental protection equipment
Various types of crucible
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
| |
Typical Values |
| SiO2: |
99.88% |
| Al2O3: |
200ppm |
| Fe2O3: |
80ppm |
| Na2O: |
50ppm |
| K2O: |
50ppm |
| TiO2 |
30ppm |
| CaO: |
30ppm |
| MgO: |
20ppm |
V. Availability Specifications
1. Block 0-60 mm
2. Granular
| 8-5mm |
5-3mm |
3-1mm |
1-0mm |
| 10-20 mesh |
20-40 mesh |
40-70 mesh |
|
| 70-140 mesh |
200mesh |
325 mesh |
500 mesh |
3. Powder
70-140 mesh, 200 mesh, 325 mesh, 500 mesh, 1500 mesh, 3000 mesh
VI. Options for Packaging
1. 1000 kg bag , 1100 kg bag
2. 25 kg plastic woven bags , 50 kg plastic woven bags , 25 kg paper bags
Company Profile
Packaging & Shipping
VII. Other
Particle size distribution controllable, can be produced according to customer granularity requirements.
We can provide customers with further detailed product information and our technical application experience.
Certifications
Installation Instructions
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