Effect of varying the ratio of matrix/dispersoid particle size on the piezoresistivity of alumina/carbon-black composite ceramics

Akira Kishimoto, Yuto Takagawa, Takashi Teranishi, Hidetaka Hayashi

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Alumina/carbon-black composite ceramics with different percolation thresholds were fabricated by changing the size ratio of constituent particles. The dependence of resistivity on pressure was established for each sample. The compositional dependence of resistivity can be explained by percolation theory. The percolation threshold decreases with increasing alumina/carbon-black particle size ratio. The pressure dependence of the resistivity increases as the composition approaches the percolation threshold. When the relative composition at the percolation threshold is fixed, the sensitivity increases with increasing matrix/dispersoid initial particle size ratio.

Original languageEnglish
Pages (from-to)2197-2200
Number of pages4
JournalMaterials Letters
Volume65
Issue number14
DOIs
Publication statusPublished - Jul 31 2011

Keywords

  • Particle size
  • Percolation
  • Piezoresistivity
  • Pressure sensor

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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