Process for the preparation by sol-gel technique, following the polymeric route, porous coatings.

摘要

Process for the preparation by sol-gel technique, following the polymeric route, porous coatings.; The procedure, executable by techniques dipping or spraying, it allows preparing vitreous coatings or polycrystalline varying compositions and high porosity, which have excellent homogeneity, adhesion and mechanical properties, reducing the reflection losses of the incident radiation on substrates as diverse as glass , metals, ceramics and thermal and photovoltaic solar cells. The porosity and hence the antireflective properties, is controlled by an additive comprising compounds derived from Teroctilfenileter polyethyleneglycol (Triton) at high concentrations, between 5 and 50 g / l, and subsequent heat treatment sintering to cause combustion of the additive . Thus porosity is increased with the amount of additive. The procedure is simple and economical, being applied to improve the transmittance of the glass and the efficiency of solar thermal and photovoltaic devices.