Abstract
The formation, spreading and collision of glass films were observed on 96% alumina substrates for thick film applications. Thin glass frit films on the substrate formed uniform and smooth films upon heating. Thick glass frit films, however, resulted in rough surfaces. The merging behavior of glass films on collision was studied with glasses of the same and different compositions. In the merging area of glass films with the same composition, the glass films did not coalesce leaving a clear boundary. The boundary was more distinct for thinner films but disappeared with increasing thickness. Films with different compositions did not coalesce regardless of the film thickness. Similar spreading experiments on the substrates glazed with the different composition showed that the interfacial interaction plays an important role.
