Relationship between wetting and electrical contact properties of pure metals and alloys on semiconducting barium titanate ceramics

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Abstract

In this work, the relationship between the thermodynamic properties of metal-ceramic interfaces and their electrical contact properties was explored for semiconducting BaTiO3 ceramics. The role of chemical reactivity at the interface was quantified through sessile drop measurements of the work of adhesion (Wad). The interfacial properties were characterized with impedance spectroscopy to quantify contact resistance and capacitance. It was observed that interfaces with a strong chemical interaction between the metal and the oxygen anion in the ceramic showed large Wad and correspondingly low contact resistances. It is believed that an oxygen depleted region near the surface of the BaTiO3 was formed as a result of the strong metal-oxygen interactions and led to a large Wad and an Ohmic contact.

Original languageEnglish (US)
Pages (from-to)4969-4976
Number of pages8
JournalJournal of Materials Science
Volume36
Issue number20
DOIs
StatePublished - Oct 15 2001

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Barium titanate
Wetting
Adhesion
Metals
Contact resistance
Oxygen
Chemical reactivity
Ohmic contacts
Cermets
Anions
Capacitance
Negative ions
Thermodynamic properties
Spectroscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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abstract = "In this work, the relationship between the thermodynamic properties of metal-ceramic interfaces and their electrical contact properties was explored for semiconducting BaTiO3 ceramics. The role of chemical reactivity at the interface was quantified through sessile drop measurements of the work of adhesion (Wad). The interfacial properties were characterized with impedance spectroscopy to quantify contact resistance and capacitance. It was observed that interfaces with a strong chemical interaction between the metal and the oxygen anion in the ceramic showed large Wad and correspondingly low contact resistances. It is believed that an oxygen depleted region near the surface of the BaTiO3 was formed as a result of the strong metal-oxygen interactions and led to a large Wad and an Ohmic contact.",
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AU - Cann, D. P.

AU - Maria, Jon-Paul

AU - Randall, Clive A.

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AB - In this work, the relationship between the thermodynamic properties of metal-ceramic interfaces and their electrical contact properties was explored for semiconducting BaTiO3 ceramics. The role of chemical reactivity at the interface was quantified through sessile drop measurements of the work of adhesion (Wad). The interfacial properties were characterized with impedance spectroscopy to quantify contact resistance and capacitance. It was observed that interfaces with a strong chemical interaction between the metal and the oxygen anion in the ceramic showed large Wad and correspondingly low contact resistances. It is believed that an oxygen depleted region near the surface of the BaTiO3 was formed as a result of the strong metal-oxygen interactions and led to a large Wad and an Ohmic contact.

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