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.

(Fumed Silica)

Specification of Fumed Silica

Fumed silica, additionally called pyrogenic silica, is a high-purity, artificial amorphous silicon dioxide (SiO ₂) created by vapor-phase hydrolysis of silicon tetrachloride in a hydrogen-oxygen flame. This procedure returns ultra-fine fragments with special physical and chemical homes, making it perfect for diverse commercial applications. Below are its vital specs:

** Physical Qualities **: Fumed silica looks like a white, fluffy, non-gritty powder with a primary fragment dimension of 7– 40 nanometers. These fragments develop three-dimensional accumulations, producing a high surface area varying from 50– 400 m ²/ g. Its low bulk density (30– 60 g/L) contributes to its lightweight, voluminous framework.

** Chemical Make-up **: Composed of ≥ 99.8% SiO ₂, fumed silica is chemically inert, non-reactive, and thermally secure as much as 1,600 ° C. Its surface area consists of silanol (Si-OH) teams, which can be changed to create hydrophobic variations making use of silane or silicone therapies.

** Surface area Attributes **: Hydrophilic fumed silica has a pH of 3.6– 4.3 (in 4% aqueous dispersion) and shows strong moisture absorption. Hydrophobic qualities, treated with dimethyldichlorosilane or comparable representatives, drive away water and display screen pH worths in between 5.0– 7.0.

** Practical Features **: Fumed silica functions as a rheology modifier, imparting thixotropy, anti-settling, and thickening impacts in fluids. It improves mechanical toughness, abrasion resistance, and thickness control in composites, finishes, adhesives, and sealants. Its high purity makes it appropriate for pharmaceuticals, food additives, and electronic devices.

** Technical Specifications **:.
– ** Loss on Drying (105 ° C) **: ≤ 1.5%.- ** Ignition Loss (1000 ° C) **: ≤ 1.0– 2.0% (hydrophilic); ≤ 0.5– 5.0% (hydrophobic, varies with therapy).
– ** Tamped Density **: 30– 60 g/L.
– ** Particle Size (Accumulations) **: 0.2– 15 µm.
– ** Oil Absorption **: 2.5– 3.5 g oil/g silica.

** Applications **: Widely utilized in silicone rubber, paints, inks, cosmetics, and food as a flow aid or anti-caking agent. In electronic devices, it acts as a filler in encapsulants. Its enhancing properties boost tire and composite efficiency.

** Security & Handling **: Safe however requires safety measures to stay clear of dust inhalation. Shop in a dry, awesome setting away from wetness. Suitable with most chemicals yet may respond with strong antacid or hydrofluoric acid.

Fumed silica’s adaptability comes from its tunable surface chemistry, nanoscale structure, and extraordinary stability, making it indispensable across markets.

(Fumed Silica)

Applications of Fumed Silica

Fumed silica, a high-purity nanomaterial generated by fire hydrolysis of silicon tetrachloride, is prized for its one-of-a-kind buildings, including high area, reduced thickness, and extraordinary thixotropic actions. These attributes make it a functional additive throughout diverse sectors.

In adhesives and sealers, fumed silica functions as a rheology modifier, preventing drooping or leaking throughout application. Its nano-sized bits form a three-dimensional network that thickens solutions without jeopardizing adhesion stamina. This is crucial in building and construction, vehicle, and aerospace applications where precision and toughness are important.

Coatings and paints take advantage of fumed silica’s capacity to control viscosity and boost anti-settling buildings. It enhances the suspension of pigments, making certain also color distribution, and gives scrape resistance in automobile and commercial coatings. UV-curable finishings likewise leverage its transparency and reactivity for enhanced coating quality.

The pharmaceutical industry uses fumed silica as a circulation representative in tablet manufacturing. Its high surface aids in soaking up wetness and preventing clumping, ensuring constant powder circulation throughout compression. It additionally works as a carrier for active ingredients in fluid drugs and maintains suspensions in injectable drugs.

In composites and polymers, fumed silica strengthens products like silicone rubber, enhancing tensile stamina, elasticity, and thermal stability. This is important for high-performance seals, gaskets, and clinical tools. It likewise boosts the mechanical residential properties of epoxy resins utilized in electronic devices and aerospace parts.

Cosmetics and personal treatment items, such as tooth paste and creams, rely on fumed silica for its mild unpleasant residential or commercial properties and capability to change texture. It maintains emulsions, manages thickness, and delivers a smooth application in sunscreens and structures.

Specialty applications include inks, where it stops sedimentation, and electronic devices, where it improves thermal conductivity in thermal interface products. Fumed silica also acts as a driver assistance in chemical reactions and enhances purification efficiency in battery separators.

With its capability to improve performance, stability, and processing throughout sectors, fumed silica stays an important additive in advancing product science and technology.

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 Fumed Silica

What is fumed silica? Fumed silica, also known as pyrogenic silica, is a synthetic form of silicon dioxide produced through flame pyrolysis. It consists of ultra-fine, amorphous particles with high surface area and low density, making it an effective thickening, anti-caking, and reinforcing agent in adhesives, coatings, and pharmaceuticals. Its unique structure enhances viscosity control and material stability. How is fumed silica produced? It is manufactured by vaporizing silicon tetrachloride in a hydrogen-oxygen flame, where it undergoes hydrolysis to form silica particles. These particles aggregate into nanometer-sized clusters, which are then collected and processed into a fine, white powder. The high-temperature process ensures high purity and consistent particle size. What are the primary applications of fumed silica? It is widely used in industries such as construction, automotive, and cosmetics. In adhesives and sealants, it improves viscosity and prevents sagging. In coatings, it enhances durability and UV resistance. Pharmaceutical tablets use it as a flow aid, while cosmetics rely on it for texture and stability. It also acts as a reinforcing filler in silicone rubber and plastics. Is fumed silica safe to handle? While amorphous fumed silica is not classified as a carcinogen, inhalation of fine dust can irritate the respiratory system. Prolonged exposure without protection may lead to lung issues. Safety measures like masks, gloves, and ventilation are recommended. Unlike crystalline silica, which poses silicosis risks, fumed silica’s amorphous structure is less hazardous but still requires careful handling. How does fumed silica differ from precipitated silica? Both are forms of synthetic silica, but fumed silica is made via flame hydrolysis, yielding smaller particles and higher purity. This results in superior thickening and reinforcing properties. Precipitated silica, produced through wet chemical processes, has larger particles and lower cost, making it suitable for less demanding applications like toothpaste or rubber. Fumed silica excels in high-performance scenarios requiring precision.

(Fumed Silica)