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Study of the volume fraction, temperature, and pressure dependence of the resistivity in a ceramic-polymer composite using a general effective media theory equation

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Abstract

A quantitative general effective media (GEM) equation is used to describe quantitatively the resistivity of an Fe3O4-epoxy composite system over a large range of volume fractions in terms of the resistivities of each component and two percolation morphology parameters. One parameter is the critical (percolation) volume fraction, φc, and the other is an exponent,t. Preliminary models, also based on the GEM equation, are used to describe the positive temperature coefficient of resistivity (PTC) and the piezoresistivity (uniaxial pressure) of the composite when the composition is near the percolation threshold.

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Author notes

  1. D. S. McLachlan

    Present address: Department of Physics, University of the Witwatersrand, Johannesburg, Republic of South Africa

Authors and Affiliations

  1. Materials Research Laboratory, The Pennsylvania State University, 16802, University Park, PA, USA

    M. Blaszkiewicz, D. S. McLachlan & R. E. Newnham

Authors
  1. M. Blaszkiewicz
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  2. D. S. McLachlan
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  3. R. E. Newnham
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Blaszkiewicz, M., McLachlan, D.S. & Newnham, R.E. Study of the volume fraction, temperature, and pressure dependence of the resistivity in a ceramic-polymer composite using a general effective media theory equation. J Mater Sci 26, 5899–5903 (1991). https://doi.org/10.1007/BF01130131

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