Tetraethyl Orthosilicate, Tetraethoxy Silane, Ethyl Silicate, Silicon Ethoxide, TEOS, 78-10-4

Tetraethyl Orthosilicate, Tetraethoxy Silane, Ethyl Silicate, Silicon Ethoxide, TEOS, 78-10-4

⚙️ Technical Specifications

🏭 Manufacturing

• Chemical Synthesis: TEOS is typically produced via alcoholysis of silicon tetrachloride: SiCl₄ + 4 EtOH → Si(OC₂H₅)₄ + 4 HCl This reaction yields tetraethyl orthosilicate and hydrogen chloride.

• Industrial Producers: Global manufacturers include Evonik, Sigma-Aldrich, Wacker, and Momentive, offering both technical and electronic grades.

• Available Forms: Liquid form with 98–99% purity, typically packaged in metal-lined IBCs or HDPE drums.

🔄 Alternatives

🧪 Application Areas

• Semiconductor Industry: Used in SiO₂ thin film deposition and insulation layers

• Sol-Gel Processes: Precursor for monodisperse silica particles (Stöber method)

• Ceramic Mold Binders: Silica-based binders for casting applications

• Coating Technologies: Water and oxygen barrier coatings for carpet, glass, metal, and wood

• Aerogel Production: Lightweight, porous silica structures via supercritical drying

• Zeolite Synthesis: Silica source for catalyst carriers and adsorbents

• Passivation Coatings: High-temperature and humidity-resistant metal surface protection

🧪 Detailed Usage Breakdown

1. Sol-Gel Applications

• Purpose: Production of SiO₂-based films, coatings, and particles

• Method: Controlled hydrolysis and condensation reactions

• Use Cases:

  • Anti-reflective and UV barrier coatings

  • Hydrophobic and oleophobic surfaces

  • Monodisperse silica particles (Stöber method)

2. Semiconductor Industry

• Purpose: SiO₂ layer formation

• Method: CVD or spin-coating followed by thermal curing

• Use Cases:

  • Microchip insulation layers

  • Dielectric coatings

  • MEMS device fabrication

3. Stone Consolidation & Restoration

• Purpose: Strengthening porous stones and waterproofing

• Method: TEOS hydrolyzes on stone surfaces, forming SiO₂ to fill microcracks

• Use Cases:

  • Historic building restoration

  • Marble, travertine, sandstone treatment

4. Zeolite & Catalyst Synthesis

• Purpose: Silica precursor

• Method: Hydrothermal synthesis with aluminum sources

• Use Cases:

  • Petroleum refining catalysts

  • Adsorbent production

5. Coatings & Resin Systems

• Purpose: Crosslinker and water barrier

• Method: Used with organosilicon resins to strengthen polymer networks

• Use Cases:

  • Carpet and textile coatings

  • Wood and metal surface protectants

  • Heat-resistant paint systems

6. Aerogel Production

• Purpose: Ultra-light, porous SiO₂ structures

• Method: Sol-gel followed by supercritical drying

• Use Cases:

  • Thermal insulation

  • Acoustic barriers

  • Aerospace materials

🧾 Alternate Names