Piezoelectric composites based on hydroxyapatite/barium titanate

Christopher R Bowen, K V S Raman, Y Yu Topolov

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

This paper reports experimental and modelling results on the manufacture and properties of hydroxyapatite / BaTiO3 ceramic composites and studies their electromechanical properties with ferroelectric ceramic volume fractions, mFC ≥ 0.7. In these composites the bio-active properties of hydroxyapatite are combined with the electromechanical properties of a perovskite-type ferroelectric BaTiO3 ceramic in an attempt to create a novel polarised bone-substitute material. Experimental results of the volume fraction dependences of the effective piezoelectric coefficients d *31(mFC), d* 33(mFC) and dielectric permittivity Ε *σ33(mFC) of stress free samples are analysed within the framework of a modified model of a porous piezo-active material that is described in terms of 1-3 (one-dimensional rods in a continuous matrix) and 2-2 connectivity (laminates). The role of several structural elements and physical factors in forming the electromechanical properties of the composites is discussed. It is shown that performance of these materials typical properties are 5 pC / N < |d*31|< 45 pC / N, 20 pC / N < d*33< 100 pC / N and 400 < Ε*σ33| Ε0< 1300.
Original languageEnglish
Title of host publicationCIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems
EditorsPietro Vincenzini, Giuseppe D'Arrigo
PublisherTrans Tech Publications
Pages1-6
Number of pages6
Volume54
DOIs
Publication statusPublished - 2008
Event3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems - Acireale, Sicily, Italy
Duration: 8 Jun 200813 Jun 2008

Conference

Conference3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems
Abbreviated titleCIMTEC 2008
CountryItaly
CityAcireale, Sicily
Period8/06/0813/06/08

Keywords

  • Piezoelectricity
  • Oxide minerals
  • Hydroxyapatite
  • Materials properties
  • Ferroelectric ceramics
  • Perovskite
  • Titration
  • Apatite
  • Ferroelectricity
  • Piezoelectric transducers

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  • Cite this

    Bowen, C. R., Raman, K. V. S., & Topolov, Y. Y. (2008). Piezoelectric composites based on hydroxyapatite/barium titanate. In P. Vincenzini, & G. D'Arrigo (Eds.), CIMTEC 2008 - Proceedings of the 3rd International Conference on Smart Materials, Structures and Systems - Smart Materials and Micro/Nanosystems (Vol. 54, pp. 1-6). Trans Tech Publications. https://doi.org/10.4028/www.scientific.net/AST.54.1