The aim of this work was the design of nanoparticulate, chemically cross-linked and mechanically resistant ceramic coatings by means of systematic particle surface modification and additive design. The investigations focused on different interface-dependent formulation strategies and their influence on the coating structure and the resulting coating properties. As a nanoparticulate material, aluminium oxide was dispersed, modified, formulated and processed into coatings. By modifying the particle surface with different amounts of ligands and adding crosslinking additives of different concentration and molecular structure, coating formulations were produced and further processed. Based on these coating formulations, relationships to the resulting structures and coating properties were derived. Among other aspects, it was found that, depending on the concentration of the crosslinking additive, an optimum degree of particle crosslinking can be achieved, which leads to enhanced mechanical properties. Furthermore, as the roughness of the coating surfaces and, thus, the optical properties, are influenced by additive segregation effects. In addition to the influence of different formulation parameters on the formation of the coating structure, it could be shown that also a modification of the substrate surface leads to higher mechanical properties. By varying the amount of modifying ligand on the substrate as well as by modifying the formulation properties, the scientific understanding of particle structure formation in coating processes was significantly deepened and the identified findings could be transferred to other particle systems (titanium dioxide) and crosslinking strategies. The latter differed above all in the addition of the crosslinking additive. For example, improved mechanical properties could be achieved if the crosslinking additive was added in a subsequent process step after the actual coating formation. Overall, numerous interrelationships between the formulation parameters, the layer structure formation as well as the application-specific coating properties could be derived, which can be also transferred to other applications.weiterlesen