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Piezoresistivity of conducting polyaniline/BaTiO3 composites

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Abstract

Conducting polyaniline/barium titanate (PANI/BaTiO3) composites exhibiting piezoresistivity properties have been synthesized by the in situ deposition technique by placing a fine grade powder of BaTiO3 in the polymerization reaction mixture. The polyaniline was formed preferentially on the ceramic particles giving a much higher yield for PANI than in absence of the BaTiO3 These composites exhibited piezoresistivity with the piezosensitivity being maximum at a certain composition. The current–voltage characteristics clearly revealed a nonlinear space charge controlled charge transport process. A large hysteresis in these characteristics was also observed which was dependent on the BaTiO3 content in a composite. The various results have been explained on the basis of the charge transport mechanism in the heterogeneous conducting material having insulating domains dispersed in it.

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Authors and Affiliations

  1. Polymer Science and Engineering Group, National Chemical Laboratory, 411 008, Pune, India

    R. C. Patil & S. Radhakrishnan

  2. Physical Chemistry Division, National Chemical Laboratory, 411 008, Pune, India

    Sushama Pethkar & K. Vijaymohanan

Authors
  1. R. C. Patil
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  2. S. Radhakrishnan
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  3. Sushama Pethkar
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  4. K. Vijaymohanan
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Patil, R.C., Radhakrishnan, S., Pethkar, S. et al. Piezoresistivity of conducting polyaniline/BaTiO3 composites. Journal of Materials Research 16, 1982–1988 (2001). https://doi.org/10.1557/JMR.2001.0271

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  • DOI: https://doi.org/10.1557/JMR.2001.0271

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