What is the difference between fumed silica and silica powder?

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Q&A: Fumed Silica vs Silica Powder

1. What is the difference between fumed silica and silica powder?Fumed silica and silica powder are both forms of silicon dioxide, but they differ in their production methods and properties.2. What is fumed silica?Fumed silica is produced by burning silicon tetrachloride in a flame of hydrogen and oxygen. This process creates nanoparticles of silica that have a high surface area and are extremely porous. Fumed silica is often used as a thickening agent, reinforcement filler, or anti-settling agent in various applications.3. What is silica powder?Silica powder is typically made by crushing and grinding natural silica or quartz crystals. It is available in various particle sizes and is commonly used in industries such as cosmetics, rubber, plastics, and ceramics. Silica powder has a wide range of applications, including as an abrasive, absorbent, and desiccant.4. How do fumed silica and silica powder differ in terms of properties?Fumed silica has a much larger surface area and is more chemically reactive compared to silica powder. Due to its unique structure, fumed silica can easily form a network in various materials, leading to improved rheological properties and reinforcement effects. On the other hand, silica powder is more cost-effective and is often preferred for bulk applications.5. What are the main uses of fumed silica and silica powder?Fumed silica is commonly used in industries such as adhesives, coatings, sealants, and composites due to its excellent thickening and anti-settling properties. Silica powder is widely used in products like toothpaste, paints, and rubber products for its abrasive, reinforcing, and moisture-absorbing properties.In summary, fumed silica and silica powder differ in their production methods, properties, and applications. Fumed silica is a high-performance additive with superior properties, while silica powder is a versatile and cost-effective material used in a wide range of industries.

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