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 Undensified fume silica hydrophobic microsilica fume

Undensified Fume Silica– Hydrophobic Microsilica Fume

Item Summary

This product is a high-purity, undensified microsilica fume dealt with to be water-repellent. It looks like a really great, free-flowing powder. The material is made from silicon or ferrosilicon alloys during electric arc heater manufacturing. After collection, it goes through surface area treatment to come to be hydrophobic.

Secret Features

– Hydrophobic nature : Resists moisture absorption, which aids maintain flowability and performance in moist conditions.
– High silica content : Consists of over 92% SiO TWO, making sure strong pozzolanic activity.
– Ultrafine particles : Average bit size is around 0.1 to 0.2 micrometers– a lot smaller than concrete particles.
– Low mass thickness : Commonly in between 150– 250 kg/m four due to its undensified kind, making it simple to spread in dry blends.
– Free-flowing : Does not glob easily, sustaining constant dosing and mixing.

Common Applications

This hydrophobic microsilica fume is utilized where moisture control and high performance are vital. Usual uses consist of:
– High-strength concrete and precast products
– Refractory castables and mortars
– Dry-mix solutions like tile adhesives and self-leveling substances
– Specialty grouts and repair products

Its water-repellent surface stops early response with water during storage space or transportation. This makes sure the material remains effective till blended right into the end product.

Handling and Storage space

Store in a completely dry, covered area. Maintain bags sealed when not being used. Prevent exposure to rainfall or high humidity. Use common industrial dirt control measures throughout handling. Wear ideal individual protective equipment, consisting of handwear covers and a dust mask.

Technical Data (Rep Worths)

– SiO ₂ material: ≥ 92%.
– Loss on ignition: ≤ 3.0%.
– Bulk thickness: 150– 250 kg/m FIVE.
– Particular surface area: 15– 30 m ²/ g (wager approach).
– Moisture material: ≤ 1.0%.

Constantly describe the current safety and security information sheet prior to use.

Applications of Undensified fume silica hydrophobic microsilica fume

Applications of Undensified Fume Silica Hydrophobic Microsilica Fume

High-Performance Concrete

Undensified fume silica hydrophobic microsilica fume substantially enhances concrete toughness and sturdiness. It fills up small voids in between concrete bits. This makes the end product denser and much less permeable. Builders utilize it in bridges, tunnels, and marine structures where long life and resistance to water or chemicals are crucial.

Refractory Materials

This product functions well in high-temperature settings. It boosts the circulation and binding power of castable refractories. That aids cellular linings in heating systems, kilns, and incinerators stand up far better under severe warm and physical anxiety. The hydrophobic nature additionally maintains moisture out throughout storage and handling.

Specialty Grouts and Repair Work Mortars

Specialists count on this additive for fast-setting repair work mixes. It boosts bond toughness and reduces shrinking. That implies patched surface areas stay intact much longer. It prevails in fixing harmed roadways, runways, and commercial floors where fast go back to service matters.

Coatings and Sealants

Producers add it to protective layers to regulate density and avoid sagging. Its water-repelling quality helps sealants resist rainfall and humidity. This works for exterior paints, water-proof membranes, and anti-corrosion systems.

Precast Concrete Products

Manufacturing facilities utilize it to make solid, smooth precast aspects like panels and pipes. The great fragments aid attain a consistent surface area finish. They also minimized air bubbles and surface issues throughout molding.

Oil and Gas Applications

In boring operations, it supports concrete slurries used to secure wells. Its hydrophobic quality guarantees regular performance even in wet conditions. This shields underground devices and prevents leaks.

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 Undensified fume silica hydrophobic microsilica fume

What is undensified fume silica hydrophobic microsilica fume?

Undensified fume silica hydrophobic microsilica fume is a very fine powder made from silicon dioxide. It comes from the fume created during silicon metal or ferrosilicon production. The “undensified” part means it has not been compressed, so it stays light and fluffy. The “hydrophobic” treatment makes it repel water. This helps it mix better in non-water-based systems like resins and coatings.

How does it differ from regular microsilica?

Regular microsilica is usually densified and absorbs water easily (hydrophilic). Hydrophobic microsilica fume is treated with chemicals that block moisture. This keeps it dry and free-flowing. Also, because it’s undensified, it has a lower bulk density. That makes it easier to disperse evenly in products like sealants, adhesives, and paints.

What are its main uses?

This material works well as a thickening or anti-settling agent. You’ll find it in epoxy systems, polyurethane sealants, and silicone rubbers. It also improves scratch resistance and adds strength without changing color. Because it repels water, it’s ideal for outdoor or humid applications where moisture control matters.

Is it safe to handle?

Yes, but you still need basic safety steps. Wear gloves, eye protection, and a dust mask. The powder is very fine, so avoid breathing it in. Store it in a dry place with the bag sealed tight. Keep it away from kids and pets. Follow the safety data sheet (SDS) for full handling instructions.

How should it be stored?

Store undensified hydrophobic microsilica fume in a cool, dry area. Keep it in its original packaging until you use it. Make sure the container stays closed to prevent clumping or moisture exposure. Even though it’s water-repellent, long-term humidity can still affect performance over time.