Nanoparticles for Ceramic and Nanocomposite Processing

Abstract

Nanoparticles of various compositions have been fabricated by chemical processes. Sol-gel processes and precipitation processes have been used to prepare the nanoparticles and surface modifiers act as vehicles to tailor surface chemistry, the ζ-potential and to avoid agglomeration. In the first described industrial product development, SiO₂ nanoparticles have been modified with CH₃ groupings and materials with high adhesive strength, being flexible despite the low organic content have been obtained and a binder system for glass fiber mats, temperature resistant up to 500°C has been developed. The second development is based on SiO₂ nanoparticles coated with methacrylic groupings and TiO₂ nanoparticles coated with epoxy groupings. The corresponding sols form high density coatings (≈65% kg volume) and are densified by crosslinking of the organics. These coatings have been used for the fabrication of interference layers (SiO₂: n≈1.45; TiO₂: n≈1,92) on plastic and glass.

Key Words:

• nanoparticles
• nanobinders
• glassfibers
• interference layers
• AR coatings on plastic