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Interactions between lead oxide and ceramic substrates for thick film technology

Published online by Cambridge University Press:  26 July 2012

Massimo Bersani ,
Bruno Morten ,
Maria Prudenziati  and
Alessandro Gualtieri
Massimo Bersani
Affiliation:
Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy
Bruno Morten
Affiliation:
Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy
Maria Prudenziati
Affiliation:
Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy
Alessandro Gualtieri
Affiliation:
Department of Earth Sciences, University of Modena, 41100 Modena, Italy
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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 , where td is the reaction time) with an activation energy of 1.20 ± 0.05 eV. The ceramic microstructure significantly affects the interaction processes.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 2 , February 1997 , pp. 501 - 508
Copyright
Copyright © Materials Research Society 1997

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References

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