Influence of Bulk and Interface Porosity on the Adhesion of Sintered Ag Films on Barium Titanate Substrates


  • Acknowledgements, Drs. J.-M. Chaix and M. Braccini (SIMAP Laboratory, Grenoble) are thanked for stimulating discussions. The authors acknowledge the practical and financial support of the Centre National de la Recherche Scientifique (France), National Science Council (Taiwan), Université Joseph Fourier (Grenoble), and National Taiwan University (Taipei).


Measurements of the practical adhesion of screen-printed Ag films on BaTiO3 substrates have been completed, showing that the interfacial crack propagation energy decreases rapidly with increasing silver volume porosity. A geometrical model is proposed to estimate the interface porosity, which is relevant for adhesion concerns, in function of the volume porosity of the sintered silver layer. Experimental results present more consistent tendencies after this transcription.