Overview
Potassium silicate liquid, commonly known as liquid potassium silicate or water glass, is an inorganic compound with the chemical formula K2SiO3. It is produced by dissolving silica in potassium hydroxide under high temperatures, resulting in a clear, viscous solution. This compound is valued for its adhesive properties, chemical stability, and resistance to high temperatures. In industrial applications, potassium silicate liquid serves as a versatile raw material for coatings, adhesives, and construction materials. Its alkaline nature and ability to form strong bonds with various substrates make it particularly useful in specialized applications such as refractory binders and anti-corrosive coatings.
Physical and Chemical Properties
Potassium silicate liquid appears as a clear, colorless to slightly yellowish solution with a density ranging between 1.25-1.40 g/cm³, depending on concentration. It is fully soluble in water and exhibits high alkalinity, with a pH typically above 11. The solution is chemically stable but reacts with acids to form silica gel. Key chemical properties include its fire resistance and ability to form durable, insoluble films upon drying. The SiO2:K2O ratio (commonly 2.0-2.5) significantly influences its viscosity and performance characteristics. These properties make it suitable for applications requiring thermal stability and strong adhesion.
Main Applications
The primary use of potassium silicate liquid is in the formulation of high-temperature coatings and refractory binders, where its thermal stability is critical. It is also widely employed in the production of adhesives for ceramics and metals, as well as in cement additives to enhance durability and reduce porosity. In the construction industry, it serves as a binder for fireproof panels and acid-resistant mortars. Additionally, potassium silicate finds applications in detergents and agriculture as a source of soluble silica and potassium. Its versatility and cost-effectiveness make it a preferred choice in various industrial sectors.
Safety and Storage
Potassium silicate liquid is corrosive and can cause severe skin and eye irritation upon contact. Proper personal protective equipment (PPE), including gloves and goggles, must be worn during handling. Adequate ventilation is essential to prevent inhalation of vapors, which may irritate the respiratory tract. Storage requires sealed containers made of polyethylene or stainless steel to prevent contamination and moisture absorption. The solution should be kept at room temperature, away from acids and oxidizing agents. Spills should be neutralized with weak acids like vinegar and cleaned promptly to avoid slippery surfaces.
B2B Procurement Guide
When procuring potassium silicate liquid, buyers should specify the SiO2:K2O ratio and viscosity to ensure compatibility with their intended applications. Bulk purchases (e.g., tanker loads) typically offer cost savings but require verification of storage and handling capabilities. Quality certifications such as ISO or REACH compliance should be prioritized to guarantee product consistency and safety. Suppliers often provide technical data sheets (TDS) detailing concentration, impurities, and recommended uses. For specialized applications like refractories, customized formulations may be available to meet specific performance requirements.
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