Journal of Materials Research

Articles

Piezoelectric and mechanical properties of structured PZT–epoxy composites

Nijesh Kunnamkuzhakkal Jamesa1 c1, Daan van den Endea2, Ugo Lafonta3, Sybrand van der Zwaaga3 and Wilhelm A. Groena4

a1 Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Department of Structures and Materials, Delft University of Technology, 2629 HS Delft, The Netherlands

a2 Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Delft University of Technology, 2629 HS Delft, The Netherlands; and Holst Centre, TNO, 5605 KN Eindhoven, The Netherlands

a3 Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Department of Aerospace Materials and Structures, Delft University of Technology, 2629 HS Delft, The Netherlands

a4 Novel Aerospace Materials Group, Faculty of Aerospace Engineering, Department of Aerospace Structures and Materials, Delft University of Technology, 2629 HS Delft, The Netherlands; and Holst Centre, TNO, 5605 KN Eindhoven, The Netherlands

Abstract

Structured lead zirconium titanate (PZT)–epoxy composites are prepared by dielectrophoresis. The piezoelectric and dielectric properties of the composites as a function of PZT volume fraction are investigated and compared with the corresponding unstructured composites. The effect of poling voltage on piezoelectric properties of the composites is studied for various volume fractions of PZT composites. The experimentally observed piezoelectric and dielectric properties have been compared with theoretical models. Dielectrophoretically structured composites exhibit higher piezoelectric voltage coefficients compared to 0–3 composites. Structured composites with 0.1 volume fraction of PZT have the highest piezoelectric voltage coefficient. The flexural strength and bending modulus of the structured and random composites were analyzed using three-point bending tests.

(Received September 26 2012)

(Accepted December 10 2012)

Key Words:

  • dielectric properties;
  • piezoelectric;
  • ceramic

Correspondence:

c1 Address all correspondence to this author. e-mail: n.kunnamkuzhakkaljames@tudelft.nl

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