Overview of Fumed Silica

Fumed silica, also known as pyrogenic silica, is an ultra-fine, high-purity amorphous silicon dioxide (SiO2) produced via the combustion of silicon tetrachloride in an oxygen-hydrogen flame. It appears as a fluffy white powder and is valued for its ability to thicken, stabilize, and reinforce materials.

Features of Fumed Silica

• High Surface Area: Typically ranges from 50 to 380 m²/g, providing excellent thickening and reinforcing properties.
• Hydrophilic or Hydrophobic Variants: Available in both forms depending on surface treatment, allowing for tailored applications.
• Excellent Thixotropy: Increases viscosity and improves flow properties of liquids and pastes.
• Chemical Inertness: Resistant to most chemicals, making it suitable for a wide range of industrial uses.

•  Enhances free-flowing properties and stability.

(Silica Fumed / SiO2 Hydrophobic Nano Silica Powder / SiO2 silicon dioxide)

Specification of Silica Fumed / SiO2 Hydrophobic Nano Silica Powder / SiO2 silicon dioxide

Silica Fumed Hydrophobic Nano Silica Powder (SiO₂) is a high-performance material designed for industrial and technical applications. The product consists of ultra-fine silicon dioxide particles with a primary particle size between 7-40 nanometers. The powder is treated to be hydrophobic, making it water-repellent. This feature improves compatibility with organic systems and prevents clumping in humid conditions.

The material has a high purity level, typically above 99.8%, ensuring minimal impurities. Its specific surface area ranges from 150-400 m²/g, providing strong adsorption and reinforcement properties. The loose bulk density is around 30-60 g/L, while the tapped density is 50-100 g/L. These characteristics make it easy to handle and mix into various matrices.

Surface modification using silane agents gives the powder its hydrophobic nature. This treatment enhances dispersion in polymers, resins, and coatings. The powder remains stable under high temperatures, with a melting point above 1,600°C. It resists oxidation and chemical corrosion, maintaining performance in harsh environments.

Applications include use in adhesives, sealants, and coatings to improve mechanical strength and durability. It acts as a thickening agent, anti-settling additive, and rheology modifier. In electronics, it serves as a filler in encapsulants to enhance thermal stability. The powder is also used in composites for aerospace and automotive parts to reduce weight while increasing toughness.

Packaging options include moisture-proof bags or sealed drums in 5 kg, 10 kg, or 25 kg quantities. Storage requires a dry, cool environment away from direct sunlight. Shelf life exceeds 12 months when unopened and stored properly.

Safety precautions include wearing gloves and masks to avoid inhalation or skin contact. The powder is non-toxic but may cause irritation if mishandled. Dispose of according to local regulations for industrial materials.

(Silica Fumed / SiO2 Hydrophobic Nano Silica Powder / SiO2 silicon dioxide)

Applications of Silica Fumed / SiO2 Hydrophobic Nano Silica Powder / SiO2 silicon dioxide

Silica fumed, also called SiO2 hydrophobic nano silica powder, serves many industries. It improves concrete performance. Adding it to concrete mixes makes the material stronger. It fills tiny gaps between cement particles. This creates a denser structure. The result is higher durability. Concrete with silica fumed resists water penetration better. This reduces corrosion risks in steel reinforcements. Builders use it in bridges, tunnels, and high-rise buildings.

In coatings and paints, SiO2 hydrophobic nano silica acts as a key additive. It forms a water-repellent layer. Surfaces stay dry longer. This protects against mold and weathering. The powder’s tiny particles help coatings stick better to substrates. Paint lasts longer without peeling. Industrial equipment coated with silica fumed resists rust and chemical damage.

The electronics industry relies on SiO2 silicon dioxide for insulation. It prevents moisture damage in circuit boards. Nano silica powder improves thermal stability in electronic adhesives. Devices stay safe in high-temperature environments. Battery manufacturers use it to boost lithium-ion battery performance. It stabilizes electrodes and extends battery life.

Pharmaceuticals use hydrophobic nano silica as a flow agent. It stops powders from clumping during production. Medicines maintain consistent quality. The material is chemically inert. It doesn’t react with active ingredients. Tablet coatings use silica fumed for smooth finishes. This makes pills easier to swallow.

Cosmetics apply SiO2 powder for texture improvement. It absorbs excess oil in skincare products. Foundations feel lighter on the skin. Sunscreens use nano silica to spread evenly. The powder scatters UV rays. This adds extra sun protection.

Rubber and plastics gain strength from silica fumed. Tires last longer with added silica. Rolling resistance decreases. Fuel efficiency improves. Plastic parts become more heat-resistant. Silica fumed prevents cracks under stress.

Environmental uses include wastewater treatment. The powder traps heavy metals in filters. Contaminated water gets cleaner faster. Air purification systems use silica to adsorb harmful gases. Indoor air quality improves.

SiO2 hydrophobic nano silica adapts to diverse needs. Its small particle size and water resistance make it versatile. Industries keep finding new ways to apply it.

Company Introduction

Welcome to HiphopGalaxy, a trusted global supplier of high-quality silicon dioxide (SiO2) powder, renowned for its exceptional purity and performance. Established with a vision to deliver cutting-edge materials that meet the diverse needs of modern industries, we have positioned ourselves as a leading player in the international market.

Our SiO2 powders find applications across multiple sectors, including adhesives, coatings, pharmaceuticals, cosmetics, polymers, and electronics. Each application benefits from the unique properties of our products—high surface area, excellent thixotropy, chemical inertness, and superior reinforcement capabilities. Whether you need hydrophilic or hydrophobic variants, we offer tailored solutions to meet your specific requirements.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of Silica Fumed / SiO2 Hydrophobic Nano Silica Powder / SiO2 silicon dioxide

What is hydrophobic nano silica powder? Hydrophobic nano silica powder is a fine white material made of silicon dioxide (SiO2). The particles are extremely small, often measured in nanometers. The powder undergoes surface treatment to repel water. This makes it ideal for applications needing moisture resistance. It is commonly used in coatings, sealants, and composites.

Where is hydrophobic nano silica powder used? It is widely used in construction materials like concrete to improve strength and durability. The powder is added to paints and coatings to create water-resistant surfaces. It is also used in adhesives, electronics, and rubber products. The hydrophobic property prevents water damage in these applications.

Why choose hydrophobic silica over regular silica? Regular silica absorbs water, which can weaken materials over time. Hydrophobic silica resists moisture. This helps products last longer in wet conditions. The powder also prevents clumping in dry mixes. It improves flowability in industrial processes.

Is hydrophobic nano silica powder safe? The powder is non-toxic and chemically inert under normal conditions. Direct contact with skin or eyes should be avoided. Inhalation of fine particles may cause irritation. Use protective gear like masks and gloves during handling. Follow safety guidelines provided by the manufacturer.

How should hydrophobic nano silica powder be stored? Keep the powder in a cool, dry place away from humidity. Seal the container tightly to prevent moisture absorption. Avoid exposure to high temperatures. Proper storage ensures the powder maintains its properties over time.

(Silica Fumed / SiO2 Hydrophobic Nano Silica Powder / SiO2 silicon dioxide)