Sol-Gel Coatings

AAC has a long stand­ing expert­ise in sol-gel chem­istry, which is used for room temper­at­ure synthesis of metal oxides. Typical examples are Si and Ti oxides, formed from their respect­ive alkox­ides. Sol-gel chem­istry is a unique way for nano­particle synthesis and low temper­at­ure processes. The vari­ation possib­il­it­ies are almost endless and have recently also be expan­ded by hybrid mater­i­als, such as silox­anes with react­ive groups (oxir­ane, isocy­anate, etc.) to combine clas­sic varnish/resin chem­istry with the possib­il­it­ies of sol-gel.

Nanostructured mater­i­als have received much atten­tion recently due to their unusual prop­er­ties such as optical, chem­ical, photo­chem­ical, and elec­tronic prop­er­ties (signi­fic­antly differ­ent from the prop­er­ties of their respect­ive bulk mater­i­als). Syntheses of nano­struc­tured or nano­par­tic­u­late mater­i­als gener­ally use the bottom-up prin­ciple, i.e. start­ing from chem­ical (dissolved) precurs­ors, instead of the top-down approach, i.e. reduc­tion of size by milling.

The activ­it­ies of AAC involving sol-gel related processes are diverse:

  • Formation of nano­particles (TiO2, SiO2, BaTiO3, rare earth phos­phors, YSZ)
  • Formation of ultrathin func­tional layers (refract­ive index, elec­trical conduct­iv­ity, low adhe­sion, self cleaning/photocatalysis)
  • Formulation of hybrid paint systems for easy-to-clean and anti-ice applic­a­tions.

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