Abstract
This paper deals with the mechanisms and kinetics of interactions between screen printed and fired PbO layers and ceramic substrates: alumina and beryllia. The interaction with alumina occurs via two main processes: (i) a reaction between PbO and Al2O3 grains, which induces the formation of a crystalline phase, Pb2Al2O5; and (ii) an interdiffusion process involving Pb and the intergranular amorphous phase in the ceramic substrate. This latter process results in a compositional change of the intergranular phase at considerable depths inside the ceramic substrate, as well as in the formation of a high lead glass layer on the substrate surface. Since PbO is not completely reacted, the Pb penetration in the ceramic is diffusion limited (penetration depth \(w \approx t_d^{1/2}\), where td is the reaction time) with an activation energy of 1.20 ± 0.05 eV. The ceramic microstructure significantly affects the interaction processes.
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Bersani, M., Morten, B., Prudenziati, M. et al. Interactions between lead oxide and ceramic substrates for thick film technology. Journal of Materials Research 12, 501–508 (1997). https://doi.org/10.1557/JMR.1997.0072
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DOI: https://doi.org/10.1557/JMR.1997.0072