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

Juan C. Nino; Michael T. Lanagan; Clive A. Randall

doi:10.1557/JMR.2001.0203

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

Juan C. Nino, Michael T. Lanagan, Clive A. Randall

Research output: Contribution to journal › Article › peer-review

71 Scopus citations

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.

Original language	English (US)
Pages (from-to)	1460-1464
Number of pages	5
Journal	Journal of Materials Research
Volume	16
Issue number	5
DOIs	https://doi.org/10.1557/JMR.2001.0203
State	Published - May 2001

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Phase formation and reactions in the Bi2O3-ZnO-Nb2O5-Ag pyrochlore system",

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.",

author = "Nino, {Juan C.} and Lanagan, {Michael T.} and Randall, {Clive A.}",

note = "Funding Information: Useful discussions were held with Thomas R. Shrout, Tomohiro Sogabe, and members of the Center for Dielectric Studies (CDS). Financial support was provided by CDS.",

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AU - Nino, Juan C.

AU - Lanagan, Michael T.

AU - Randall, Clive A.

N1 - Funding Information: Useful discussions were held with Thomas R. Shrout, Tomohiro Sogabe, and members of the Center for Dielectric Studies (CDS). Financial support was provided by CDS.

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N2 - 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.

AB - 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.

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

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