An investigation into group 13 (Al, Ga, In) substituted (Na0.5Bi0.5)TiO3-BaTiO3 (NBT-BT) lead-free piezoelectrics

JOURNAL OF ALLOYS AND COMPOUNDS

卷:762

Article

McQuade, Ryan¹  Rowe, Thomas¹  Manjon-Sanz, Alicia¹  de la Puente, Lilibel¹  Dolgos, Michelle R.¹ 

[1] Oregon State Univ, Dept Chem, Gilbert Hall 153, Corvallis, OR 97331 USA

关键词: Relaxor;    Piezoelectric;    Perovskite;    Oxide;    Structure-property;    Relationships;   

DOI  :  10.1016/j.jallcom.2018.04.329

来源: Elsevier

【 摘 要 】

Ternary phase diagrams were explored for the systems(Na0.5Bi0.5)TiO3-BaTiO3 M = Al, Ga, In to determine periodic trends as a function of substitution. The ferroelectric and piezoelectric properties were measured and compared to(Na0.5Bi0.5)TiO3-BaTiO3 (NBT-BT). X-ray synchrotron and neutron diffraction data were collected to determine the changes in structure as a function of substitution. Data showed that most systems behave in a similar manner to the parent (Na0.5Bi0.5)TiO3-BaTiO3. However, two specific compositions display interesting properties: the 2% BiGaO3(BG2) substituted sample and the 4% BiAlO3(BA4) substituted sample. The BG2 sample undergoes an irreversible electric-field induced phase transition, as seen in NBT-BT, but has a significantly larger high-field strain. The BA4 composition has a different strain mechanism than all the other composition studied. It displays incipient piezoelectricity which results in a giant high-field strain due to a reversible phase transition. This study highlights the difficulty in trying to improve the properties of the highly disordered NBT-BT material. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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