Fumed Silica (Erosil – NV/200) Fumed silica, such as Erosil-NV/200, is a type of amorphous, nano-sized silica produced by the vapor-phase hydrolysis of silicon compounds also known as pyrogenic silica, is a type of synthetic amorphous silica that is widely used in various industrial applications, including investment casting. It is produced by the vaporization of silicon tetrachloride in a flame of hydrogen and oxygen, resulting in the formation of tiny, highly pure silica particles. Fumed Silica (Erosil – NV/200) has a high surface area, high purity, and very small particle size, making it ideal for a range of applications.
- Here are some of the applications and uses of Fumed Silica (Erosil – NV/200) for investment casting:
Improved Surface Finish: One of the primary applications of Fumed Silica (Erosil -NV/200) in investment casting is to improve the surface finish of the final product. Fumed Silica (Erosil – NV/200) can be added to investment casting slurries to help fill in small surface imperfections, resulting in a smoother surface finish. The small particle size and high surface area of Fumed Silica (Erosil – NV/200) allow it to provide this benefit without adding significant weight or changing the dimensions of the casting.
Reduced Shrinkage: Fumed Silica (Erosil – NV/200) can also be used to reduce the shrinkage of investment castings. When added to the slurry, Fumed Silica (Erosil – NV/200) increases the viscosity and reduces the flow rate of the slurry, resulting in less shrinkage during the casting process. This can help to improve the accuracy and consistency of the dimensions of the final product.
Improved Dimensional Stability: Increased strength: In addition to reducing shrinkage, Fumed Silica (Erosil – NV/200) can also improve the dimensional stability ofinvestment castings. The addition of Fumed Silica (Erosil – NV/200) to the slurry helps to reduce the amount of deformation that occurs during the casting process, resulting in more accurate and consistent dimensions. This is especially important for applications where tight tolerances are required.
Better Mold Release: Another benefit of using Fumed Silica (Erosil – NV/200) in investment casting is that it can increase the strength of the final product. When added to the slurry, Fumed Silica (Erosil – NV/200) helps to create a stronger and more durable casting. This can be particularly beneficial in applications where the casting will be subjected to high stress or wear. Fumed Silica (Erosil – NV/200) can be used as a mold release agent in investment casting. The small particle size of
Fumed Silica (Erosil – NV/200) helps to create a smooth and uniform coating on the mold surface, making it easier to release the casting from the mold. This can help to reduce the risk of defects and improve the overall quality of the final product.
In summary, Fumed Silica (Erosil – NV/200) is a versatile and valuable material in investment casting applications, providing improved surface finish, reduced shrinkage, improved dimensional stability, increased strength, and better mold release. By adding Fumed Silica (Erosil – NV/200) to investment casting slurries, manufacturers can create high-quality, consistent, and durable castings that meet the demands of a wide range of applications.
