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Phase formation and reactions in the Bi2O3–ZnO–Nb2O5–Ag pyrochlore system

Published online by Cambridge University Press:  31 January 2011

Juan C. Nino ,
Michael T. Lanagan  and
Clive A. Randall
Juan C. Nino
Affiliation:
Center for Dielectric Studies, Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802
Michael T. Lanagan
Affiliation:
Center for Dielectric Studies, Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802
Clive A. Randall
Affiliation:
Center for Dielectric Studies, Materials Research Laboratory, Pennsylvania State University, University Park, Pennsylvania 16802
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Abstract

Mixed-phase compositions in the Bi2O3–ZnO–Nb2O5 pyrochlore system have been previously identified as potential low-fire dielectric composites for high-frequency multilayer devices. However, there has been a problem with the ability to co-process this material with silver. It was found that an intermediate BiNbO4 phase that occurs during calcination can interact with silver during co-sintering, forming a deleterious phase. Processing routes to control the presence of remanent BiNbO4 were investigated, such as ZnO stoichiometric adjustment, low partial pressure of oxygen sintering atmosphere, and specific temperature-time dwells.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 5 , May 2001 , pp. 1460 - 1464
Copyright
Copyright © Materials Research Society 2001

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