Preserving the Natural Crystal Structure
Crystalline Silica Filler uses natural crystalline quartz as its raw material. We use physical processing to keep the quartz crystal's true properties. These include high hardness, low thermal expansion, excellent dielectric performance, and stable chemical inertness. Compared to fused silica products, our product has clear advantages in thermal expansion matching and cost. It is especially suitable for applications that need dimensional stability and electrical insulation.
Full-Process Quality Control
Our quality control for Crystalline Silica Filler covers the entire production flow. We start by selecting the best ore. We only use quartz with good crystal development and low impurities. During processing, we precisely control the milling and grading parameters. This ensures the product keeps a regular crystal shape and a narrow particle size distribution. Our QC team has gathered rich quality control experience over 25 years. We test every batch of product strictly before shipping. Our products now sell to major industrial provinces in China and to many countries in Southeast Asia and the Middle East. Our annual sales remain stable at 50 million RMB.
Complete Specifications for Your Selection
|
Parameter |
Typical Value / Range |
Test Standard |
|
Main Content (SiO₂) |
≥ 99.0% |
Chemical Analysis |
|
Crystal Form |
Crystalline |
X-Ray Diffraction |
|
Density |
2.65 g/cm³ |
Pycnometer Method |
|
Mohs Hardness |
7 |
Scratch Test |
|
Thermal Expansion Coefficient |
13×10⁻⁶ /℃ |
Thermal Dilatometer |
|
Particle Size (D50) |
3μm - 30μm (Customizable) |
Laser Diffraction |
|
Dielectric Constant (1MHz) |
≤ 4.5 |
Dielectric Loss Tester |
|
Whiteness |
≥ 92 |
Whiteness Meter |
Key Applications and Custom Service
Crystalline Silica Filler serves many high-tech industries including electronics, electrical, and composites. In epoxy molding compounds and electronic potting compounds, it is a core filler. Its low thermal expansion matches silicon chip behavior. This reduces stress damage during thermal cycling. In high-voltage insulation castings, its high volume resistivity and low dielectric loss ensure long-term reliability. In advanced composites, it improves rigidity and dimensional stability. We offer full custom sizes from D50 3μm to 30μm. The minimum order is 1 ton.
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