Giant strain with ultra-low hysteresis and high temperature stability in grain oriented lead-free K 0.5 Bi 0.5 TiO3-BaTiO3-Na0.5 Bi0.5 TiO3 piezoelectric materials

Deepam Maurya, Yuan Zhou, Yaojin Wang, Yongke Yan, Jiefang Li, Dwight Viehland, Shashank Priya

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Abstract

We synthesized grain-oriented lead-free piezoelectric materials in (K 0.5 Bi 0.5 TiO3-BaTiO3-Na0.5 Bi0.5 TiO3 (KBT-BT-NBT) system with high degree of texturing along the [001]c (c-cubic) crystallographic orientation. We demonstrate giant field induced strain (∼0.48%) with an ultra-low hysteresis along with enhanced piezoelectric response (d 33 ∼ 190pC/N) and high temperature stability (∼160°C). Transmission electron microscopy (TEM) and piezoresponse force microscopy (PFM) results demonstrate smaller size highly ordered domain structure in grain-oriented specimen relative to the conventional polycrystalline ceramics. The grain oriented specimens exhibited a high degree of non-180° domain switching, in comparison to the randomly axed ones. These results indicate the effective solution to the lead-free piezoelectric materials.

Original languageEnglish (US)
Article number8595
JournalScientific reports
Volume5
DOIs
StatePublished - 2015

All Science Journal Classification (ASJC) codes

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