In addition to our own formulation, we also supply LUDOX™ Colloidal Silica binders. The most noticeable difference is that its in liquid form, as opposed to powder. It is non-combustible, non-explosive, and non-toxic. The most noticeable difference is that its in liquid form, as opposed to powder. Colloidal silica varies from other types of silica in several significant ways. Colloidal silica is a solid made from silica particles that have been fused together to form a solid gel. They are usually stabilized electrostatically and have densities in the range of 2.1 to 2.3 g/cm3. In a solution, the solvent (such as water) breaks the active. colloidal silica varies from other types of silica in several significant ways. Colloidal silicas are typically aqueous suspensions in the range of 30 500 nm in diameter. Remet supply our proprietary Colloidal Silica REAMSOL®, which has been specifically designed for the investment casting industry. Colloidal silica is a mixture of a liquid and silica particles. Reduced material usage in the back up coatįurthermore, use of colloidal silica binders has allowed investment casters a greater freedom of design with an increased level of intricacy to castings.Ĭeramic shells using colloidal silica binders also display excellent refractory properties, thermal resistant to temperatures as high as ……, with good resistance to thermal shock and crucially little shrinkage.The exceptionally strong bonds formed by the colloid enables ceramic shells to have a superior green and fired strength. This versatility allows Colloidal Silica to form the basis of ceramic shells used for the casting of a large range of metal alloys.Ĭeramic shells formed with colloidal silica binder’s offer several advantages for the investment process. In addition to being extremely durable, stable, and heat-tolerant, these particles can be tailor-made and chemically customized to yield enormous potential across a wide variety of applications. It may be produced by Stber process from Tetraethyl orthosilicate - Wikipedia (TEOS). LUDOX colloidal silicas are discrete nanoscale spherical particles of amorphous silica dispersed in water. What is Colloidal Silica In the most general terms colloidal silica is a dispersion of amorphous silicon dioxide (silica) particles in water. It offers the investment caster a safe, economical, easy to use slurry component that performs well as either primary or backup slurry.Ĭolloidal Silica systems are very stable able to form a long life ceramic slurry with a large range of refractory materials due to the binder’s chemical inertness. Colloidal silicas are suspensions of fine amorphous, nonporous, and typically spherical silica particles in a liquid phase. Colloidal Silica Investment Casting BindersĬolloidal Silica is the most popular binder used in the precision investment casting industry today.
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