Sodium Silicate Ceramic Deflocculant
CAS Number: 1344-09-8
Sodium silicate (waterglass) is one of the oldest and most widely used ceramic deflocculants, typically used in combination with STPP in traditional ceramics. The silicate anion increases the negative surface charge on clay particles, reducing viscosity and improving casting behavior. It also acts as a binder component in colloidal silica refractories and investment casting shells.
Technical Specifications
| appearance | Colorless to light yellow viscous liquid |
| purity (%) | ≥99 |
| Baumé degree | 38–50 |
| density (g/cm³) | 1.35–1.55 |
| SiO2/Na2O molar ratio | 2.0–3.5 (various grades) |
Applications
- Co-deflocculant with STPP in porcelain and sanitaryware slips
- Deflocculant and binder in investment casting ceramic shells
- Refractory castable binder and bonding agent
- Stabilizer for colloidal silica refractory coatings
- Hardener for foundry sand molds
Key Features
- Synergistic effect with STPP gives optimal deflocculation in clay-based slips
- Provides additional binding strength in investment casting shells
- Readily available in multiple modulus grades for different applications
- Cost-effective inorganic deflocculant with proven track record
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CAS Number
1344-09-8
Category
Ceramic / Glass AdditivesAvailability
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