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Piezoelectric and mechanical behavior of NaNbO3/PEKK lead-free nanocomposites

Bessaguet, Camille and Dantras, Eric and Lacabanne, Colette and Chevalier, Mathieu and Michon, Guilhem Piezoelectric and mechanical behavior of NaNbO3/PEKK lead-free nanocomposites. (2017) Journal of Non-Crystalline Solids, 459. 83-87. ISSN 0022-3093

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Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2016.12.030


Lead-free piezoelectric nanocomposites based on poly(ether ketone ketone) (PEKK) and sodium niobate (NaNbO3) particles were elaborated. The presence of submicronic particles does not influence the thermal stability of the matrix so that no degradation phenomenon is observed before 500 °C. The conservative mechanical modulus G′ increases linearly with the NaNbO3 fraction; this variation is well fitted by the Kerner model until 20 vol%. Such nanocomposites remain ductile. The polarizing field required for obtaining piezoelectric nanocomposites is 12 kV·mm−1 i.e. analogous with the one used for poling bulk ceramic. The value of the piezoelectric coefficient (d33 = 0.2 pC·N−-1 for 20 vol% NaNbO3) is consistent with the Furukawa's model. This value is explained by the low PEKK permittivity. This low d33 is counterbalanced by the piezoelectric voltage constant (g33 = 103·10−3 Vm·N−1) which is higher than the one of classical piezoelectric ceramic like PZT or BaTiO3.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com
HAL Id:hal-01481093
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > IRT Saint Exupéry - Institut de Recherche Technologique (FRANCE)
Laboratory name:
IRT Saint Exupéry - Commissariat Général aux Investissements - Agence Nationale de la Recherche
Deposited On:19 Jan 2017 09:29

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