| Customization: | Available |
|---|---|
| CAS No.: | 7631-86-9 |
| Formula: | Sio2 |
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Fumed silica (also known as pyrogenic silica) is a state-of-the-art ultra-fine inorganic nanomaterial crafted through a sophisticated high-temperature vapor-phase hydrolysis process. With its remarkably small nanoscale particle size (7-40 nm), exceptionally expansive surface area (50-400 m²/g), and unsurpassed chemical purity (≥99.8%), it delivers exceptional performance in reinforcement, thickening, and rheology control.
This pioneering material is non-toxic, odorless, and environmentally friendly, making it the perfect choice for high-end applications in rubber, coatings, electronics, cosmetics, pharmaceuticals, and beyond. Its distinctive attributes-including thermal stability, outstanding dispersibility, and innovative surface activity-make it an indispensable additive across a multitude of industries.
| Property | Specification | Test Method | Grade Variations |
|---|---|---|---|
| SiO2 Purity (%) | ≥99.8 | ISO 3262 | Electronic Grade: ≥99.9% |
| Primary Particle Size | 7-40 nm | TEM | Ultra-Fine: 5-15 nm (CMP Slurries) |
| BET Surface Area (m²/g) | 50-400 | ISO 9277 | High-SSA: 300-400 (Silicone Rubber) |
| Tapped Density (g/L) | 30-100 | ISO 787-11 | Low-Density: <50 (Aerogels) |
| pH (4% Dispersion) | 3.6-4.5 | ISO 787-9 | Neutralized: 6.0-7.0 (Pharma) |
| Loss on Ignition (%, 950°C) | ≤1.0 (Hydrophilic) | ISO 3262-20 | Hydrophobic: ≤2.5% |
| Carbon Content (Hydrophobic, %) | 0.5-5.0 | ASTM D1993 | High-Modification: 5-10% (Silylated) |
| Oil Absorption (g/100g) | 150-350 | ASTM D2414 | Low-Oil: 100-150 (Coatings) |
Mechanical Boost: This cutting-edge fumed silica substantially enhances the tensile strength, reaching impressive levels of up to 12 MPa, while significantly boosting tear resistance, as confirmed by ASTM D624 standards, especially in HTV and LSR grades.
Transparency: Our fumed silica ensures exceptional transparency, maintaining over 90% light transmission, which is critically important for high-performance LED encapsulation.
Thixotropy Control: Achieve superb sag resistance with film thickness exceeding 500 micrometers, as verified by ASTM D4402 testing, ensuring your coatings stay smooth and uniform.
UV Stability: Enhance product longevity with powerful UV stability, preventing settling in automotive clear coats, as rigorously tested by QUV-A standards.
Viscosity Modifier: Our product provides unparalleled shear-thinning properties, crucial for optimal sunscreen performance, adhering to ISO 22716 compliance.
Free-Flow Agent: This versatile agent prevents caking in powdered APIs, meeting the strict standards of USP <476>, ensuring a smooth, free-flowing consistency.
About Us
About Us: Jingdezhen Shengtian Tuyuan Trading Co., Ltd is a vanguard in the realm of chemical trading, with state-of-the-art production facilities that propel us ahead of the competition. Our proficiency extends across industrial, agricultural, and food-grade chemicals, each crafted with an unyielding commitment to superior quality. Our distinguished team, boasting over 100 seasoned professionals, carries the esteemed ISO 9001, 14001, and 45001 certifications, as well as CE marks, assuring unwavering compliance with global standards. This steadfast dedication solidifies our reputation as a trusted partner on the international stage.
Our Strengths
Quality & Competitive Pricing- With the support of a robust factory-backed supply chain, we assure rigorous quality control while offering cost-effective solutions that surpass expectations.
Diverse Product Range- Our product portfolio features groundbreaking industrial chemicals, innovative agricultural solutions, and premium food-grade ingredients, tailored to meet a wide array of needs.
Certified Excellence- Our trio of ISO certifications and CE marks stand as a beacon of our enduring commitment to safety, reliability, and compliance with stringent regulatory standards, underscoring our promise of excellence.
Q1: Are you a manufacturer or a trader?
We are an integrated industrial and trading company.
Q2: Do you have a stable production facility?
Yes, we operate a 2,000+ sqm factory, ensuring stable supply and consistent quality.
Q3: Where do you ship from, and how long is the lead time?
We ship from Tianjin Port, China. Lead time is 7-15 days after deposit (sample orders: 3-5 days).
Q4: Do you offer free samples?
Yes! Samples are free, but freight is paid by the buyer. Custom formulations require a small fee.
Q5: Do prices drop for bulk orders?
Yes! Prices are negotiable based on volume. Contact us for the lowest quote (raw material prices fluctuate, so we adjust accordingly).
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