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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 (W ad). 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 W ad 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 W ad and an Ohmic contact.

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Authors and Affiliations

  1. The Center for Dielectric Studies, Materials Research Laboratory, The Pennsylvania State University, University Park, PA, 16802, USA

    D. P. Cann, J.-P. Maria & C. A. Randall

Authors
  1. D. P. Cann
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  2. J.-P. Maria
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  3. C. A. Randall
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Correspondence to D. P. Cann.

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Cann, D.P., Maria, JP. & Randall, C.A. Relationship between wetting and electrical contact properties of pure metals and alloys on semiconducting barium titanate ceramics. Journal of Materials Science 36, 4969–4976 (2001). https://doi.org/10.1023/A:1011817128242

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