Fumed Silica
Fumed silica, also known as pyrogenic silica or silicon dioxide, is a highly versatile and finely divided form of silicon dioxide, primarily produced through a process called pyrolysis. Fumed silica is characterized by its unique physical and chemical properties, making it valuable in various industries and applications.
About our supplier
OCI Company Ltd. is a leading South Korean producer of high-quality chemical and advanced materials, founded in 1959 and based in Seoul. With more than six decades of expertise, OCI supplies essential raw materials such as fumed silica.
Unique Properties
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High Surface Area: Fumed silica has an extremely high surface area, which provides excellent reinforcement and thickening properties.
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Thixotropy: It exhibits thixotropic behavior, meaning it becomes less viscous when subjected to shear stress and regains its viscosity when at rest.
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Chemical Inertness: Fumed silica is chemically inert and does not react with most substances, making it compatible with various formulations.
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Lightweight: It has a low bulk density, making it lightweight and suitable for use in applications where weight matters.
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Non-Toxic and Non-Carcinogenic: Fumed silica is considered safe for use in various industries.
Highlighted Product Grades
| Grade | Viscosity (25℃, 10% Suspension） | Phosphorus %（w/w） | Particle size um | Notes |
|---|---|---|---|---|
| APP 222H | <= 50 | 31-32 | 12 | not surface treated |
| APP 224H | <50 | 31-32 | 15 | high content of phosphorus and nitrogen, excellent thermal stability |
| APP 262 | <20 | 29-31 | 12 | lower water soulubility and lower viscosity the APP224H |
Alternative for
The choice of using fumed silica depends on specific application requirements, including viscosity control, reinforcement, and suspension properties. Alternatives may include other types of fillers, thickeners, or rheology modifiers, depending on the desired characteristics and cost considerations. The selection is influenced by factors such as surface area requirements, compatibility with other materials, and regulatory compliance. Fumed silica is preferred when its unique combination of properties aligns with the application’s needs, particularly when fine-tuning rheological properties and enhancing performance are essential.
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