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Structures and piezoelectric properties of (Bi 0.5 Na 0.5 )TiO 3 -(Na 0.5 K 0.5 )NbO 3 based lead-free ceramics

Abstract : Lead-free (1-x)(Bi 0.5 Na 0.5 )TiO 3 -xNa 0.5 K 0.5 NbO 3 , (x = 0-8 mol%) (abbr., BNT-xNKN) solid solutions were fabricated by mechanical alloying technique. XRD and SEM showed the crystal structure of the samples become more tetragonal and their grain size become small with the increase of substitution. Dielectric studies revealed that the phase transition temperatures shift to low temperature with the increase of NKN. The piezoelectric properties of BNT-xNKN can not be enhanced with the increase of NKN, but their dielectric properties have been improved. The results show that the BNT-xNKN ceramics are one of the promising lead-free materials for capacitor applications. © Taylor andamp; Francis Group, LLC.
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https://hal-centralesupelec.archives-ouvertes.fr/hal-02271076
Contributor : Amandine Lustrement <>
Submitted on : Monday, August 26, 2019 - 3:12:23 PM
Last modification on : Wednesday, July 1, 2020 - 4:22:03 PM

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L. Liu, L. Fang, H. Fan, Hichem Dammak, M. Pham Thi. Structures and piezoelectric properties of (Bi 0.5 Na 0.5 )TiO 3 -(Na 0.5 K 0.5 )NbO 3 based lead-free ceramics. 12th International Meeting on Ferroelectricity, IMF-12 and the 18th IEEE International Symposium on Applications of Ferroelectrics, ISAF-18, Aug 2009, Xi'an, China. pp.240-246, ⟨10.1080/00150193.2010.482849⟩. ⟨hal-02271076⟩

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