Study of 1-3 PZT fibre/epoxy composite force sensor

S. H. Choy, H. L W Chan, M. W. Ng, P. C K Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)

Abstract

Lead zirconate titanate (PZT) fibres were prepared by a powder-based extrusion method. Pre-sintered PZT powder mixed with poly(acrylic acid) was spun in a spinnerette to produce fibres. The fibre of ∼ 400 μm diameter was used to fabricate 1-3 PZT fibre/epoxy composite discs with different volume fractions (ψ) of PZT. Since the ceramic fibres are rather brittle, their elastic properties cannot be measured directly. In order to determine the properties of the ceramic fibres, effective properties of the fibres/epoxy 1-3 composite were measured. By using a modified series and parallel model, the properties of 1-3 composites can be calculated. Then, the elastic coefficient s33,fibre E, relative permittivity ε 33,fibre T and piezoelectric strain coefficient d 33,fibre of the ceramic fibre could be found. Ring-shaped PZT fibre/epoxy materials composites with different ψ were fabricated to be used as the sensing material in force sensor applications. The ring-shape composite with ψ=0.5 was installed into a housing and the sensor was calibrated by different methods and its sensitivity was found to be 144 pC/N within the frequency range of 0.5-6.4 kHz which is much higher than that of a quartz force sensor with a similar structure.

Original languageEnglish
Pages (from-to)817-821
Number of pages5
JournalApplied Physics A: Materials Science and Processing
Volume81
Issue number4
DOIs
Publication statusPublished - 1 Sep 2005

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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