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Adhesion Effects of Intermediate Layers on the Densification of Ceramic Powders
Authors:B. Frisch   W. -R. Thiele
Abstract:In the ceramic technology the first step to produce sintered bodies is the manufacturing of powders which then are densified. The adhesion mechanisms between the single particles and the agglomerates produced from them determine the densification process. Starting from theoretical considerations adhesion mechanisms, such as solid bridge formation, adhesive bonding and glide-promoting effects, are discussed in principle. Subsequently, the effects of surface-active substances on the densification behaviour of clay-ceramics and oxide-ceramic bodies are discussed. Further, the evaluation of the action of additives to the powder mixtures on the microstructure of the compacts, such as porsity and texture, leads to a compaction equation which describes the transition from the powder pile to a densified green body.
Keywords:Adhesion of layers  adhesion mechanisms  ceramic powders  densification  effect of surfactants  structure of compacts
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