High-Purity Fused Silica Grade A Sand
Clean, high-purity fused silica sand selected for technical ceramics, fused silica rollers, crucibles and advanced refractory products.
Specifications
- Mesh Size
- 120mesh,200mesh,325mesh,600mesh,800mesh,1250mesh,2000mesh,2500mesh,3000mesh,5000mesh
- Particle Size
- 3-5mm,1-3mm,1-0.5mm,0.5-0.2mm,0.1-0.2mm,0.1-0mm(120mesh),0.075mm(200mesh)
- SiO₂ Content
- 99.8-99.99%
- Bulk Density
- 1.0~1.5 g/cm³
- Specific Gravity
- 2.20 g/cm³
- Thermal Expansion
- 0.5*10⁻⁶
- Moh's hardness
- 7
GRADE A FUSED SILICA SAND
High-Purity Fused Silica Grade A Sand
Clean, high-purity fused silica sand selected for technical ceramics, fused silica rollers, crucibles and advanced refractory products.
Grade A Sand for Ceramic and Refractory Feed Systems
High-purity quartz is fused at high temperature, cooled and graded. The Grade A positioning focuses on a clean granular feed for ceramic and refractory production; final chemistry and size acceptance remain subject to the agreed COA.
Applications
Why Use This Grade
- Amorphous fused silica structure with low reference thermal expansion.
- Granular product format suitable for customer-selected size cuts.
- Approved category-wide physical, chemical and PSD tables included.
Physical Properties
| No. | Property | Reference value |
|---|---|---|
| 1.1 | Composition | SiO₂ |
| 1.2 | Structure | Amorphous |
| 1.3 | Colour | Transparent or white |
| 1.4 | Melting Temperature | approx. 1750°C |
| 1.5 | Specific Gravity | 2.21 g/cm³ |
| 1.6 | Hardness | 7 Mohs |
| 1.7 | Thermal Expansion | 0.5 × 10⁻⁶ |
Chemical Properties — Investment Casting Grade
| No. | Component | Reference value |
|---|---|---|
| 2.1 | SiO₂ | >99.90% |
| 2.2 | Al₂O₃ | <200 ppm |
| 2.3 | Fe₂O₃ | <50 ppm |
| 2.4 | TiO₂ | <20 ppm |
| 2.5 | MgO | <40 ppm |
| 2.6 | CaO | <40 ppm |
| 2.7 | Alkalies (Na₂O + K₂O) | <100 ppm |
Processing note: The finer the powder, the higher the Al₂O₃ may be because the powder is produced by ball milling with alumina balls.
Particle Size Distribution
| Mesh | Microns | 10/20 mesh | 20/50 mesh | 30/50 mesh | 50/100 mesh | −100 mesh | −200 mesh | −325 mesh |
|---|---|---|---|---|---|---|---|---|
| 8 | 2360 | <2 | ||||||
| 12 | 1700 | 6–25 | ||||||
| 16 | 1180 | 33–50 | ||||||
| 20 | 850 | 25–45 | <1 | <1 | ||||
| 30 | 600 | 13 | 25–40 | 15–30 | ||||
| 40 | 425 | 32–45 | 38–50 | |||||
| 50 | 300 | 15–30 | 20–35 | <13 | ||||
| 70 | 212 | 30–60 | ||||||
| 80 | 180 | 0–11 | <10 | <1 | ||||
| 100 | 150 | 28–51 | <15 | <1 | ||||
| 140 | 106 | 4–16 | 17–40 | <10 | ||||
| 200 | 75 | <2 | 19–34 | <10 | <3 | |||
| 325 | 45 | 14–30 | 15–30 | 4–11 | ||||
| Pan | <3 | <2 | <2 | <1 | 4–20 | 70–80 | 86–97 |
Pan designates the percentage passing the last reported screen for each size.
Order specification: State the required granular cut, chemistry limit, test method and end-use process.
Material and Processing
Selected quartz is fused at high temperature and cooled to form amorphous silica, then crushed, cleaned and classified into the required granular cut. Grade and black-spot acceptance must be confirmed in the purchase specification.
Packaging and Supply
- Export packaging is confirmed against the selected grade and order quantity.
- Current COA, particle-size requirement and sample availability can be reviewed before ordering.
Information to Include in Your Inquiry
- Target application and process.
- Required particle size or mesh range.
- Required chemistry or batch-control limits.
- Sample quantity, annual demand and destination port.
FAQ
Request a Quote
Send your application, target particle size and purchase quantity to receive a grade review, current COA and sample plan.
Request a Quote
