Recent Advances in Ceramic-polymer Composite Electrets

Carlos J. Dias, Rui Igreja, Rosa Marat-Mendes, Paulo Inácio, José N. Marat-Mendes, Dilip K. Das-Gupta

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Recent work on ceramic-polymer composites for piezoelectric and pyroelectric applications is presented with special regard to the production and characterisation of new composite materials as well as two new applications of these composite materials. One of these composites is made using ceramic powders obtained using the sol-gel technique. This technique allows a better control of the stoichiometry as well as a lower temperature of crystallisation as compared with the conventional mixed oxides route. A better control of powder morphology also produces ceramic grains in the sub-micron range enabling the production of nanocomposites with electroactive properties. A second type of composite is reported using high temperature polymer PEEK, thus extending the temperature range of common electroactive composite materials. Finally the use of these materials is demonstrated in two piezoelectric applications, an angular acceleration accelerometer and an acoustic emission sensor.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalIeee Transactions On Dielectrics And Electrical Insulation
Volume11
Issue number1
DOIs
Publication statusPublished - 1 Feb 2004

Keywords

  • Acoustic emission sensor
  • Angular acceleration sensor
  • Ceramic-polymer electrets
  • Ferroelectric composites
  • High temperature ferroelectric composites
  • Sol-gel ceramics

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