Explore Top-Quality Fumed Silica with Aure Chemical
Fumed Silica is a synthetic, amorphous silicon dioxide characterized by its extremely fine particle size, high specific surface area, and unique branched, chain-like structure. It is produced by the flame hydrolysis of silicon tetrachloride in a high-temperature hydrogen-oxygen flame, resulting in a white, fluffy, and lightweight powder. This distinctive morphology makes fumed silica an indispensable additive for controlling rheology, improving physical properties, and enhancing stability across a vast range of industrial applications.
Basic Information of Fumed Silica
| CAS No.: | 112945-52-5 (This CAS number is commonly used for synthetic amorphous silica, including fumed silica) |
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| EC No.: | 231-545-4 |
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| Linear Formula: | SiO₂ |
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| Molecular Weight: | 60.08 |
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| Appearance: | White, amorphous powder |
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| Melting Point: | >1600°C |
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| Primary Particle Size: | Typically 7-40 nm (nanometers) |
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| Density: | 2.3 lb/cu.ft at 25 °C (bulk density)(lit.) |
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| Hydrophilic vs. Hydrophobic: | Available in both hydrophilic (untreated) and hydrophobic (surface-treated) grades to suit specific formulation needs. |
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| Rheological Properties: | Excellent thixotropic, thickening, and anti-settling capabilities. |
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| Flow Aid: | Acts as an effective reinforcing filler in elastomers and plastics. |
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| RIDADR: | Improves powder flow and prevents caking. |
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| Adsorbent: | Good adsorption capacity for liquids. |
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| Chemical Structure: |  |
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Applications of Fumed Silica
Fumed Silica's versatility stems from its unique physical and chemical properties, making it a critical additive in numerous industries:
Paints, Coatings, and Inks:
Acts as a highly effective rheology modifier and thickener, preventing pigment settling and improving sag resistance.
Enhances scratch and abrasion resistance, and provides matting effects in various finishes.
Improves dispersion stability and print quality in inks.
Adhesives and Sealants:
Provides thixotropy and viscosity control, preventing slumping and improving application properties.
Acts as a reinforcing filler, enhancing mechanical strength and cohesive properties.
Silicone Rubber and Elastomers:
Essential reinforcing filler in silicone rubbers (HTV, RTV, LSR), significantly improving tear strength, tensile strength, and hardness.
Contributes to the transparency and processability of silicone compounds.
Plastics and Composites:
Improves mechanical properties, heat resistance, and dimensional stability.
Used as an anti-blocking agent for plastic films.
Cosmetics and Personal Care:
Functions as a thickener and suspending agent in creams, lotions, and gels.
Provides a pleasant, non-greasy feel and enhances stability in makeup formulations.
Used as an adsorbent for sebum and in antiperspirant/deodorant sticks.
Pharmaceuticals:
Food Industry:
Why Choose Aure Chemical's Fumed Silica?
By partnering with Aure Chemical for your Fumed Silica needs, you gain access to:
Superior Quality & Purity: We supply fumed silica that meets stringent purity and performance standards, ensuring consistent and optimal results in your formulations.
Diverse Grades Available: We offer a range of hydrophilic and hydrophobic grades with varying surface areas to precisely match your application requirements.
Consistent Performance: Our robust quality control processes guarantee the reliability and batch-to-batch consistency of our fumed silica.
Reliable Supply Chain: Benefit from our efficient logistics and stable inventory, ensuring timely delivery to support your production schedules.
Expert Technical Support: Our knowledgeable team is ready to provide in-depth technical information and guidance to help you select the ideal fumed silica grade and optimize its incorporation into your products.
