Compatibility of RuO2 electrodes with PZT ceramics

K. T. Jacob; G. Rajitha; V. S. Saji

doi:10.1007/s12034-009-0045-5

Compatibility of RuO₂ electrodes with PZT ceramics

K. T. Jacob, G. Rajitha, V. S. Saji

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

3 Scopus citations

Abstract

Because of its high electrical conductivity and good diffusion barrier properties ruthenium dioxide (RuO₂) is a good electrode material for use with ferroelectric lead zirconate-titanate (PZT) solid solutions. Under certain conditions, RuO₂ can react with PZT to form lead ruthenate (Pb₂Ru₂O_6.5) during processing at elevated temperatures resulting in lead depletion from PZT. The standard Gibbs energies of formation of RuO₂ and Pb₂Ru₂O_6.5 and activities of components of the PZT solid solution have been determined recently. Using this data along with older thermodynamic information on PbZrO₃ and PbTiO₃, the stability domain of Pb ₂Ru₂O_6.5 is computed as a function of PZT composition, temperature and oxygen partial pressure in the gas phase. The results show PbZrO₃-rich compositions are more prone to react with RuO₂ at all temperatures. Increasing temperature and decreasing oxygen partial pressure suppress the reaction. Graphically displayed are the reaction zones as a function of oxygen partial pressure and PZT composition at temperatures 973, 1173 and 1373 K.

Original language	English
Pages (from-to)	313-319
Number of pages	7
Journal	Bulletin of Materials Science
Volume	32
Issue number	3
DOIs	https://doi.org/10.1007/s12034-009-0045-5
State	Published - Jun 2009
Externally published	Yes

Bibliographical note

Funding Information:
One of the authors (KTJ) is grateful to the Indian National Academy of Engineering, New Delhi, for the award of INAE Distinguished Professorship. (GR) thanks the University Grants Commission of India for the award of Dr D S Kothari Postdoctoral Fellowship.

Keywords

Interface reactions
PDRuO formation
Pb(ZrTi)O (PZT) solid solution
RuO electrode
Stability fields
Thermodynamic analysis

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials

Access to Document

10.1007/s12034-009-0045-5

Cite this

@article{f258031458c748fbaf43485373ad2961,

title = "Compatibility of RuO2 electrodes with PZT ceramics",

abstract = "Because of its high electrical conductivity and good diffusion barrier properties ruthenium dioxide (RuO2) is a good electrode material for use with ferroelectric lead zirconate-titanate (PZT) solid solutions. Under certain conditions, RuO2 can react with PZT to form lead ruthenate (Pb2Ru2O6.5) during processing at elevated temperatures resulting in lead depletion from PZT. The standard Gibbs energies of formation of RuO2 and Pb2Ru2O6.5 and activities of components of the PZT solid solution have been determined recently. Using this data along with older thermodynamic information on PbZrO3 and PbTiO3, the stability domain of Pb 2Ru2O6.5 is computed as a function of PZT composition, temperature and oxygen partial pressure in the gas phase. The results show PbZrO3-rich compositions are more prone to react with RuO2 at all temperatures. Increasing temperature and decreasing oxygen partial pressure suppress the reaction. Graphically displayed are the reaction zones as a function of oxygen partial pressure and PZT composition at temperatures 973, 1173 and 1373 K.",

keywords = "Interface reactions, PDRuO formation, Pb(ZrTi)O (PZT) solid solution, RuO electrode, Stability fields, Thermodynamic analysis",

author = "Jacob, \{K. T.\} and G. Rajitha and Saji, \{V. S.\}",

note = "Funding Information: One of the authors (KTJ) is grateful to the Indian National Academy of Engineering, New Delhi, for the award of INAE Distinguished Professorship. (GR) thanks the University Grants Commission of India for the award of Dr D S Kothari Postdoctoral Fellowship.",

year = "2009",

month = jun,

doi = "10.1007/s12034-009-0045-5",

language = "English",

volume = "32",

pages = "313--319",

journal = "Bulletin of Materials Science",

issn = "0250-4707",

publisher = "Indian Academy of Sciences",

number = "3",

}

TY - JOUR

T1 - Compatibility of RuO2 electrodes with PZT ceramics

AU - Jacob, K. T.

AU - Rajitha, G.

AU - Saji, V. S.

N1 - Funding Information: One of the authors (KTJ) is grateful to the Indian National Academy of Engineering, New Delhi, for the award of INAE Distinguished Professorship. (GR) thanks the University Grants Commission of India for the award of Dr D S Kothari Postdoctoral Fellowship.

PY - 2009/6

Y1 - 2009/6

N2 - Because of its high electrical conductivity and good diffusion barrier properties ruthenium dioxide (RuO2) is a good electrode material for use with ferroelectric lead zirconate-titanate (PZT) solid solutions. Under certain conditions, RuO2 can react with PZT to form lead ruthenate (Pb2Ru2O6.5) during processing at elevated temperatures resulting in lead depletion from PZT. The standard Gibbs energies of formation of RuO2 and Pb2Ru2O6.5 and activities of components of the PZT solid solution have been determined recently. Using this data along with older thermodynamic information on PbZrO3 and PbTiO3, the stability domain of Pb 2Ru2O6.5 is computed as a function of PZT composition, temperature and oxygen partial pressure in the gas phase. The results show PbZrO3-rich compositions are more prone to react with RuO2 at all temperatures. Increasing temperature and decreasing oxygen partial pressure suppress the reaction. Graphically displayed are the reaction zones as a function of oxygen partial pressure and PZT composition at temperatures 973, 1173 and 1373 K.

AB - Because of its high electrical conductivity and good diffusion barrier properties ruthenium dioxide (RuO2) is a good electrode material for use with ferroelectric lead zirconate-titanate (PZT) solid solutions. Under certain conditions, RuO2 can react with PZT to form lead ruthenate (Pb2Ru2O6.5) during processing at elevated temperatures resulting in lead depletion from PZT. The standard Gibbs energies of formation of RuO2 and Pb2Ru2O6.5 and activities of components of the PZT solid solution have been determined recently. Using this data along with older thermodynamic information on PbZrO3 and PbTiO3, the stability domain of Pb 2Ru2O6.5 is computed as a function of PZT composition, temperature and oxygen partial pressure in the gas phase. The results show PbZrO3-rich compositions are more prone to react with RuO2 at all temperatures. Increasing temperature and decreasing oxygen partial pressure suppress the reaction. Graphically displayed are the reaction zones as a function of oxygen partial pressure and PZT composition at temperatures 973, 1173 and 1373 K.

KW - Interface reactions

KW - PDRuO formation

KW - Pb(ZrTi)O (PZT) solid solution

KW - RuO electrode

KW - Stability fields

KW - Thermodynamic analysis

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DO - 10.1007/s12034-009-0045-5

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