Ultra-Low-Alkali Quartz Sand for Optical & Electronic Use
Refined 40–140 mesh high-purity quartz sand for optical quartz components and electronic quartz materials. Available in ultra-low-alkali and controlled-aluminium grades, with SiO₂ from 99.9% to 99.999% and Fe₂O₃ up to 0.001%. Batch inspection and sealed paper-drum packing support stable industrial processing.
Specifications
- SiO₂
- 99.9%–99.999%
- Fe₂O₃
- ≤0.001%
- Particle size
- 40–140 mesh (106–425 μm)
- Alkali grade
- Ultra-low-alkali grade available; Na/K/Li limits confirmed by grade
- Aluminium
- Controlled-aluminium grades available
- Appearance
- Clean white quartz sand; no visible colour spots
- Raw material
- Selected natural crystal or premium natural quartz
- Packaging
- Sealed paper drums; final net weight confirmed with quotation
- Quality documents
- Batch COA available with agreed test items
40–140 Mesh High-Purity Quartz
Ultra-Low-Alkali Quartz Sand for Optical & Electronic Use
Refined quartz sand for optical and electronic quartz processing where particle-size consistency, low iron and controlled alkali content are required. The 40–140 mesh grade corresponds to approximately 106–425 μm.
Product Characteristics
Selected natural crystal or premium natural quartz is sorted and processed into a clean fine-sand fraction. Available grades combine low iron with controlled alkali and aluminium levels. The exact grade is selected against the buyer's end use and analytical limits rather than applying one specification to every optical or electronic process.
Properties & Applications
| Property | Processing Value | Relevant Applications |
|---|---|---|
| Low iron and clean appearance | Supports transparent-product evaluation and colour control | Optical quartz parts and transparent technical quartz |
| Ultra-low-alkali grades | Helps control ionic contamination where Na, K and Li are critical | Electronic quartz materials and insulation components |
| High-temperature stability | Suitable for evaluation in quartz melting and forming processes | Quartz tubes, plates and precision components |
| 40–140 mesh grading | Provides a defined fine-sand feed range for process trials | Application-specific quartz melting and batch preparation |
Optical Quartz Components
Low iron, controlled impurities and clean visual quality make suitable grades a raw-material option for optical quartz tubes, plates and precision components. Final suitability should be checked against the customer's transmission, hydroxyl, bubble and trace-element requirements.
Electronic Quartz Materials
High insulation, corrosion resistance and thermal stability support evaluation in electronic quartz processing. When ionic contamination is important, the individual Na, K and Li limits should be written into the purchase specification and confirmed for the selected grade.
Technical Specification
| Item | Available Range | Order Requirement |
|---|---|---|
| SiO₂ | 99.9–99.999% | Confirm the grade required by the process |
| Fe₂O₃ | ≤0.001% | Grade-specific confirmation and batch COA |
| Particle size | 40–140 mesh (106–425 μm) | Alternative cuts require prior confirmation |
| Alkali metals | Ultra-low-alkali grades available | State individual Na, K and Li limits |
| Aluminium | Controlled-aluminium grades available | State the maximum acceptable Al level |
| Appearance | Clean white quartz sand | No visible colour spots |
Order specification: Published figures describe the available supply range. Final acceptance follows the mutually confirmed grade, test method and batch certificate of analysis.
40–140 Mesh Size Reference
| Screen | Approximate Opening | Control Point |
|---|---|---|
| 40 mesh | 425 μm | Upper boundary |
| 70 mesh | 212 μm | Intermediate check |
| 100 mesh | 150 μm | Intermediate check |
| 140 mesh | 106 μm | Lower boundary |
Quality Control and Packaging
Particle-size checks, chemistry review and retained batch samples support traceable supply. Product can be sealed in lined paper drums to reduce foreign-material exposure during storage and transport.
- Sieve control across the agreed particle-size range.
- Grade-specific impurity inspection against the order specification.
- Batch identification and retained sample for traceability.
- Packaging weight and liner configuration confirmed with the quotation.
Information Required for Quotation
- Finished optical or electronic quartz product.
- Required SiO₂, Fe₂O₃, Na, K, Li and Al limits.
- Required particle-size distribution and test method.
- Trial quantity, annual demand and destination.
Frequently Asked Questions
Request a Quote for Ultra-Low-Alkali Quartz Sand
Send your purity limits, Na/K/Li and aluminium requirements, particle-size range, application, quantity and destination for a grade-matched quotation.
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