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.

Specification of silica fume hot CAS 7631-86-9

Item Spec: Silica Fume (CAS 7631-86-9)

Review

Silica fume is a very fine powder made primarily of amorphous silicon dioxide (SiO TWO). It creates as a byproduct during the production of silicon or ferrosilicon alloys in electric arc heaters. This material appears as a gray or off-white powder with incredibly tiny particle dimension– much finer than normal concrete.

Key Properties

Chemical Formula: SiO ₂.
CAS Number: 7631-86-9.
Appearance: Penalty, free-flowing powder (gray to white).
Regular SiO Two Material: ≥ 85% to 98%.
Average Particle Dimension: 0.1 to 0.5 micrometers.
Mass Thickness: 200– 700 kg/m THREE (varies by handling method).
Specific Surface: 15,000– 30,000 m TWO/ kg (gauged by BET approach).

Performance Benefits

When contributed to concrete or cement blends, silica fume loads small spaces in between concrete particles. This makes the final product denser and more powerful. It likewise reduces leaks in the structure, which assists protect versus chloride and sulfate strikes. Frameworks developed with silica fume reveal better sturdiness, especially in harsh atmospheres like aquatic setups or locations with heavy traffic.

Usual Applications

Silica fume is extensively made use of in high-performance concrete, precast aspects, bridge decks, passage linings, and marine building and construction. It also finds use in refractory castables, oil well grouts, and specialized mortars where high stamina and low porosity are needed.

Handling and Storage space

Store silica fume in a dry, protected area far from wetness. Maintain containers secured when not in use. Use proper dirt control steps during handling– wear protective gear such as masks and safety glasses to avoid breathing or eye contact. The product is safe but can create irritability if inhaled in large amounts.

Applications of silica fume hot CAS 7631-86-9

Applications of Silica Fume (CAS 7631-86-9)

High-Performance Concrete

Silica fume is commonly made use of to make high-strength and durable concrete. When added to concrete mixes, it fills tiny voids in between concrete particles. This makes the concrete denser and much less porous. Therefore, water and unsafe chemicals discover it more difficult to enter the product. Structures constructed with this concrete last longer, especially in extreme atmospheres like seaside locations or areas with heavy traffic.

Oil and Gas Industry

In oil wells, silica fume boosts the high quality of cement utilized for casing and securing. Standard cement can crack under high pressure or temperature. Adding silica fume makes the cement stronger and a lot more secure. It also reduces leaks in the structure, which helps stop gas leakages and safeguards the well’s integrity with time.

Refractory Products

Silica fume plays a key role in making refractory castables– products that line furnaces, kilns, and activators. These products must hold up against extreme warm without damaging down. Silica fume functions as a binder that increases stamina at both room temperature level and high warm. It likewise assists the combination circulation much better during installation while preserving architectural stability after healing.

Marine and Infrastructure Projects

Bridges, tunnels, and aquatic piers face constant exposure to deep sea and weather condition changes. Utilizing silica fume in their concrete mix substantially boosts resistance to chloride strike and deterioration. This protection extends the service life of important infrastructure and decreases long-lasting maintenance expenses.

Precast Concrete Products

Suppliers of precast components– like pipelines, panels, and beam of lights– utilize silica fume to achieve smoother surfaces and greater early toughness. This permits faster demolding and quicker manufacturing cycles. The final products are also more consistent and much less most likely to develop surface area problems.

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 fume hot CAS 7631-86-9

Top 5 FAQs About Silica Fume (CAS 7631-86-9)

What is silica fume?

Silica fume is a very fine powder made mostly of silicon dioxide (SiO₂). It forms as a byproduct when producing silicon or ferrosilicon alloys in electric arc furnaces. Its particles are much smaller than cement grains. This gives it strong pozzolanic properties, which means it reacts with calcium hydroxide in concrete to form more cement-like compounds.

Why is silica fume used in concrete?

People add silica fume to concrete to make it stronger and more durable. It fills tiny gaps between cement particles, making the mix denser. This reduces water penetration and slows down corrosion of steel reinforcement. Concrete with silica fume also gains strength faster and resists wear better.

Is silica fume safe to handle?

Silica fume is not classified as hazardous under normal use. However, like any fine powder, it can irritate eyes, skin, or lungs if inhaled in large amounts. Always wear gloves, safety glasses, and a dust mask when handling it. Store it in a dry place away from moisture to avoid clumping.

How is silica fume different from other silica products?

Silica fume has an extremely high surface area and purity compared to other silica sources like fly ash or ground granulated blast-furnace slag. Its particle size is about 100 times smaller than cement. This makes it far more reactive in concrete mixes and gives superior performance in high-strength applications.

What standards does silica fume meet?

Quality silica fume meets international standards such as ASTM C1240 and EN 13263. These set minimum requirements for SiO₂ content (usually over 85%), loss on ignition, and moisture levels. Always check the product’s certificate of analysis to confirm it meets your project’s specifications.