CAS: 112945-52-5
Fumed silica high-purity, finely divided silica manufactured through a flame process. Is responsible for enhancing numerous industrial applications. In contrast to the precipitated silica, which has a relatively lower purity, the fumed silica possesses exceptionally high surface area and controllable viscosity; therefore, it is particularly useful for a range of applications, particularly in the construction industry. In combination with its capability of material stabilization and reinforcement, it has contributed towards the improvement in the performance of paints, adhesives, and polymers.
The spotlight, however, is yet chiseling off in the mood and activities of fumed silica, for the multi-voiced use-across applications of liquid flow enhancement to moisture absorbent-all against the portrayal of the fumed silica as a fine and powder-like material. The small particle size and special feature distinguish fumed silica from other forms of silica as it improves many substances while retaining the integrity of an informal state.
Chemical Properties of Fumed Silica:
● CAS Number: 1112945-52-5
● Molecular Formula: SiO₂
● Melting point: >1600°C
● Boiling Point: 2,230° C
Physical Properties:
● Fine powder texture
● White to off-white color
● Extremely low bulk density
● High surface area, typically 200-400 m²/g
● Hydrophilic nature
Applications in the Construction Industry:
Fumed silica is widely used in construction; its unique properties allow it to enhance the consistency and performance of a variety of materials:
● Cements and Concrete: It increases the compression and durability of concrete due to improved bonding and reduced cracking.
● Coatings and Adhesives: Helps to control viscosity when being spread smoothly and uniformly for application of paints and coatings.
● Selants and Elastomers: Functions as reinforcement in sealants, providing improved adhesion and resistance to weathering.