Precipitated Silicate
Overview
Precipitated Silicate is an industrially synthesized compound produced through controlled precipitation reactions, yielding a fine, high-purity powder. It is distinct from natural silicates due to its uniform particle size and tailored chemical composition. The material is valued for its versatility, serving as a cost-effective alternative to natural silicates in applications requiring precise physical or chemical properties. Its production involves reacting sodium silicate with acids or metal salts under specific pH and temperature conditions. This process allows manufacturers to adjust properties like surface area, porosity, and reactivity, making it suitable for specialized industrial uses.
Physical and Chemical Properties
Precipitated Silicate exhibits a high surface area (typically 50–400 m²/g) and low bulk density, which enhance its performance as an adsorbent or reinforcing agent. Its amorphous structure provides thermal stability, withstanding temperatures up to 1,000°C without phase changes. The material is chemically inert under normal conditions but reacts with strong acids or bases. Key metrics include pH (8–11 for most variants), moisture content (<5%), and loss on ignition (<10%). These properties ensure compatibility with polymers, coatings, and inorganic matrices, where it improves mechanical strength and durability.
Main Applications
In detergents, Precipitated Silicate acts as a builder to soften water and improve cleaning efficiency by sequestering calcium and magnesium ions. The construction industry uses it as a cement additive to reduce shrinkage and enhance early strength development. Ceramic manufacturers incorporate it into glazes for improved viscosity control and opacity. Rubber and plastics industries rely on its reinforcing capabilities to increase tensile strength and abrasion resistance. Emerging applications include battery separators and catalyst supports, leveraging its porous structure and thermal stability.
Safety and Storage
While non-toxic, the fine powder can cause respiratory irritation if inhaled. OSHA recommends using NIOSH-approved dust masks (N95 or equivalent) during handling. Spills should be cleaned with wet methods to minimize dust dispersion. Skin contact requires only basic washing with soap and water. Storage must prioritize dryness to prevent caking. Bulk bags or moisture-resistant packaging are ideal. Shelf life exceeds two years when stored below 30°C and 60% relative humidity. Incompatible materials include strong oxidizers and fluorine compounds.
B2B Procurement Guide
Industrial buyers should specify technical requirements such as SiO₂ content (typically 70–90%), particle size distribution (D50: 5–50 µm), and tap density (0.2–0.5 g/cm³). Request Certificates of Analysis (CoA) for trace metal content, especially for food-contact or electronic-grade applications. Suppliers often offer customized formulations with adjusted alkalinity or surface treatments. MOQs range from 1-ton bags for standard grades to full truckloads (20–25 tons) for bulk purchases. Lead times vary from 2 weeks (stock items) to 6 weeks (custom productions).
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