LUDOX® AS-30

LUDOX® AS-30 is an alkaline dispersion of amorphous silica stabilized with Ammonium. It is typically used as a binder in high temperature applications.
Product Overview
LUDOX® AS-30 is a 30% active, alkaline colloidal silica with a particle size of 12 nm. The silica particles are stabilized with ammonium hydroxide to allow for use in applications that are sensitive to sodium ions.
Product Specifications
Chemistry:
Colloidal Silica
Silica Content: 29-31%
Specific Surface Area: 198-258 m2/g
pH: 9.1-9.7
Specific Gravity: 1.2 (@25°C)
Viscosity: 11 cP (@25°C)
Particle Charge: Negative
Stabilizing Counter Ion: Ammonium
Primary Chemistry: Colloidal Silica
Features & Benefits
Negative Sols (Anionic)
Small Particle Size
Narrow Particle Size Distribution
Ammonium Counter Ion
Excellent Binding Strength
Outstanding Formulation Stability
Extreme Temperature Resistance
Problems Solved
Poor temperature resistance of binders used in ceramics.
Lack of green strength of formed ceramic shapes.
High reject rates of formed ceramic shapes due to surface defects.
Applications
LUDOX® AS-30 is an excellent binder and improves the strength and durability of ceramics, refractory materials, adhesives, and coatings. It is commonly used in applications that require extremely high temperature stability as it is more thermally resistant than sodium stabilized dispersions.