General-Purpose Crystalline Silica Powder 325 Mesh
General-purpose 325 mesh crystalline silica powder for ceramics, refractories and mineral-filled industrial compounds. Controlled screening supports consistent dry blending and formulation. SiO₂ is maintained at 99.3–99.7%; confirm the required particle-size distribution and test method with your order.
Specifications
- Mesh Size
- 325mesh,400mesh,600mesh,800mesh,1250mesh,2000mesh,2500mesh,3000mesh,5000mesh,6000mesh
- 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
- 99.3-99.7%
- Fe₂O₃
- <0.015%
- Moisture
- <0.1%
- Whiteness
- 92-95
- Moh's hardness
- 7
- Specific Gravity
- 2.65g/cm³
GENERAL-PURPOSE CRYSTALLINE SILICA
General-Purpose Crystalline Silica Powder 325 Mesh
A controlled 325 mesh crystalline silica powder for ceramics, refractory mixes and mineral-filled industrial compounds. It provides the hardness and chemical stability of natural crystalline silica in a practical general-purpose filler grade.
Product Overview
This grade is produced from crystalline quartz raw material through crushing, grinding and controlled screening. The 325 mesh designation provides a convenient purchasing reference for general dry formulations, while the required residue limit or particle-size distribution should be agreed for applications that need tighter control.
Technical Properties
| Property | Approved Value | Order Note |
|---|---|---|
| Mesh size | 325 mesh | Specify residue or PSD method when required |
| Particle size (μm) | 45 μm nominal sieve opening | Not a claim that every particle is 45 μm |
| SiO₂ content | 99.3–99.7% | Crystalline silica grade |
| Fe₂O₃ | <0.015% | Approved specification limit |
| Moisture | <0.1% | Protect from moisture after opening |
| Whiteness | 92–95 | Confirm test method for color-critical use |
| Moh's hardness | 7 | Relevant to abrasion and processing equipment |
| Specific gravity | 2.65 g/cm³ | Use for formulation and loading calculations |
Particle-size note: 325 mesh is a sieve designation with a nominal opening of approximately 45 μm. For a maximum particle size, screen residue or full distribution requirement, include the test method and acceptance limit in the purchase specification.
Controlled Grinding and Screening
Quartz raw material is reduced to powder and screened to produce the selected grade. Enclosed transfer, clean handling and batch sampling help limit contamination and support consistent supply. The agreed inspection plan can include chemistry, moisture, whiteness and particle-size checks.
Properties and Applications
| Product Attribute | Formulation Value | Typical Application |
|---|---|---|
| Controlled 325 mesh grade | Practical dry blending and filling behavior for general formulations | Industrial mineral-filled compounds |
| Crystalline mineral structure | Hard mineral filler with stable inorganic composition | Ceramic bodies and technical mineral mixes |
| High SiO₂ content | Supports silica-rich formulation targets | Refractory and construction-material formulations |
| White powder appearance | Useful where a neutral mineral filler color is preferred | Ceramics and light-colored industrial compounds |
Quality Control, Packaging and Supply
Representative batch samples can be checked against the approved specification before release. Standard packing uses moisture-protected 25 kg bags. Palletizing, stretch wrapping and export packing can be selected according to order quantity and shipping conditions.
- Batch identification and retained samples support shipment traceability.
- Moisture-protected inner liners help maintain powder condition in storage and transport.
- 25 kg bags can be palletized for handling and export shipment.
- Store sealed in a dry area and control dust during transfer and mixing.
Information Needed for a Quote
- Application and target addition rate in the formulation.
- Required mesh, screen residue or particle-size distribution and test method.
- Chemistry, moisture, whiteness or other acceptance requirements.
- Trial quantity, regular demand and delivery schedule.
- Bag, pallet and export-packing requirements.
Frequently Asked Questions
Request a 325 Mesh Silica Powder Quote
Send your application, required particle-size test, quantity and packing needs for grade confirmation.
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