Products

You are here: Home » Products » Fused Silica Powder » Fused Silica Ultrafine Powder

Fused Silica Ultrafine Powder

This product is manufactured from high-purity quartz sand through arc melting, ultra-fine grinding, and precision classification processes. With an ultra-high purity of 99%+ and customizable particle size distribution (D50 0.5μm-50μm), it exhibits excellent thermal stability, low expansion coefficient, and chemical inertness, making it an ideal functional filler for high-end ceramics, electronic packaging, and specialty coatings.

Availability:

Quantity:



Inquire Add to Basket

Product Description

Product Overview

This product is manufactured from high-purity quartz sand through arc melting, ultra-fine grinding, and precision classification processes. With an ultra-high purity of 99%+ and customizable particle size distribution (D50 0.5μm-50μm), it exhibits excellent thermal stability, low expansion coefficient, and chemical inertness, making it an ideal functional filler for high-end ceramics, electronic packaging, and specialty coatings.

Key Specifications

Parameter	Technical Data
SiO₂ Purity	≥99% (measured 99.2%-99.8%)
Particle Size (D50)	0.5μm-50μm (custom grading available)
Whiteness	≥92% (ISO brightness standard)
Mohs Hardness	7
Thermal Expansion Coefficient	0.54×10^-6/ºC (20-1000ºC)
Dielectric Constant	3.8 (at 1MHz)

Product Advantages

Precision Classification Technology - Dual-process air flow + centrifugal classification ensures narrow particle size distribution.
Low Metal Residue - Full ceramic production line with Fe₂O₃ content <50ppm.
Surface Modifiable - Optional silane coupling agent coating.
Batch Consistency - Laser particle size analyzer testing per batch, CV <3%.

Typical Applications

Electronic Materials
→ Epoxy resin encapsulation filler (improves thermal conductivity/reduces CTE)
→ Semiconductor CMP slurry

Specialty Ceramics
→ High-frequency ceramic substrate additive
→ High-temperature kiln furniture materials

Composite Materials
→ Silicone rubber reinforcing agent (alternative to fumed silica)
→ Aerospace ablation-resistant materials

Coating Industry
→ Wear-resistant enhancer for anti-corrosion coatings
→ Optical coating diffuser

Packaging & Storage

Standard Packaging: 25kg/bag (PE-lined)
Custom Packaging: Available in ton bags or vacuum packaging upon request.
Storage Recommendation: Keep in a cool, dry environment to prevent moisture absorption.

Quality Control
Inspection Report: COA provided upon request.

Service Support

Free samples available (from 100g)
Technical support team for formulation optimization
OEM particle size customization and surface treatment services