The thermochemistry and non-ohmic electrical contacts of a BaTiO3 PTCR ceramic

David P. Cann, Clive A. Randall

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


In this investigation we establish a fundamental link between olectrode-semiconducting oxide adhesion characteristics and the electronic characteristics. For a number of metal electrodes, we relate the non-Ohmic contact resistance to the thermodynamic work of adhesion. The thermodynamic work of adhesion is determined from metal cation-metal atom interactions and the metal atomoxygen interactions, and compared to sessile drop wetting experiments. The non-Ohmic contacts are characterized by impedance spectroscopy methods to separate grain, grain boundary, and electrode contact resistance.

Original languageEnglish (US)
Pages (from-to)1405-1408
Number of pages4
JournalIEEE transactions on ultrasonics, ferroelectrics, and frequency control
Issue number6
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering


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