caa a22 4500 388022078 CHVBK 20180307124927.0 cr unu---uuuuu 161130e199807 xx s 000 0 eng 10.1557/JMR.1998.0265 doi S0884291400045015 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0265 Interactions between bismuth oxide and ceramic substrates for thick film technology [Elektronische Daten] We investigated the interactions between screen printed and fired layers of Bi2O3 and ceramic substrates of alumina and beryllia. It was found that the reaction products are invariably crystalline in nature. Several transitions of Bi2O3 in its polymorphic phases were found to occur on BeO substrates, while newly formed compounds have been observed to grow on alumina substrates, i.e., Al4Bi2O9 on 99.9% Al2O3 and Bi12SiO20 on 96% Al2O3. Bismuth deeply penetrates in the ceramic interstices in all the cases. Until Bi2O3 is not completely reacted, this penetration is diffusion limited (penetration depth , where td is the reaction time) with values of the activation energy ranging from 3.7 ± 0.6 eV (BeO substrate) to 1.4 ± 0.06 eV (96% Al2O3 substrate). It is shown that these processes are notably different to those occurring in PbO/ceramic systems; moreover, they imply different adhesion phenomena of thick films on different substrates. Copyright © Materials Research Society 1998 Immovilli Simona Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy Morten Bruno Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy Prudenziati Maria Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy Gualtieri Alessandro Department of Earth Sciences, University of Modena, 4100 Modena, Italy Bersani Massimo CMBM (Centre of Medical Biophysics and Materials), Povo, Trento, Italy Journal of Materials Research Cambridge University Press 13/7(1998-07), 1865-1874 0884-2914 13:7<1865 1998 13 JMR https://doi.org/10.1557/JMR.1998.0265 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0265 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Immovilli Simona Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy NATIONALLICENCE 700 1- Morten Bruno Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy NATIONALLICENCE 700 1- Prudenziati Maria Istituto Nazionale per la Fisica della Materia (INFM) and Department of Physics, University of Modena, 41100 Modena, Italy NATIONALLICENCE 700 1- Gualtieri Alessandro Department of Earth Sciences, University of Modena, 4100 Modena, Italy NATIONALLICENCE 700 1- Bersani Massimo CMBM (Centre of Medical Biophysics and Materials), Povo, Trento, Italy NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/7(1998-07), 1865-1874 0884-2914 13:7<1865 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge