Low-Dust Fused Silica Powder for Investment Casting Shells
Amorphous fused silica powder for investment casting with low thermal expansion, high SiO2 purity, and dust-removed, size-controlled particles for reliable shell building.
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
LOW-DUST INVESTMENT CASTING GRADE
Low-Dust Fused Silica Powder for Investment Casting Shells
Amorphous fused silica powder prepared for ceramic shell slurry and stucco systems where particle-size control and reduced airborne fines are important process considerations.
Distinct Focus: Dust-Controlled Ceramic Shell Processing
This page is deliberately differentiated from the existing general investment-casting fused silica product. Its search intent focuses on dust-controlled powder handling, slurry qualification and ceramic shell process consistency.
Applications
Why Use This Grade
- Distinct low-dust and ceramic-shell search intent avoids duplicating the general product.
- Approved fused silica reference tables are preserved exactly.
- CTA requests slurry system, mesh range and trial conditions.
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: Provide the slurry system, target mesh range, dust-control requirement and test method.
Material and Processing
High-purity quartz is fused into amorphous silica, then ground and classified. Dust-removal treatment and particle-size acceptance must be confirmed for the target ceramic shell system before production use.
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
