Effect of sintering temperature on the structural disorder and its influence on electromechanical properties of the morphotropic phase boundary composition 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 (NBT-6BT)

• Published in: Journal of materials science. Materials in electronics Vol. 32; no. 12; pp. 16088 - 16103
• Main Authors: Mishra, Anupam, Khatua, Dipak Kumar, Das Adhikary, Gobinda, Kumar, Naveen, Upadhyay, Ashutosh, Mahale, Bhoopesh, Saha, Sujoy, Majumdar, Bhaskar, Senyshyn, Anatoliy, Ranjan, Rajeev
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2021; Springer Nature B.V
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Composition; Crystal structure; Electric fields; Ferroelectric materials; Ferroelectricity; Lead free; Materials Science; Optical and Electronic Materials; Phase boundaries; Piezoelectricity; Sintering; Spectrum analysis; Transmission electron microscopy
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-021-06157-1

We have investigated the effect of sintering temperature on the microstructure, crystal structure, dielectric, ferroelectric, and piezoelectric properties of the morphotropic phase boundary (MPB) composition lead-free piezoelectric 0.94Na 0.5 Bi 0.5 TiO 3 -0.06BaTiO 3 (NBT-6BT). We have found that the specimen sintered at an optimized temperature (1150 °C) exhibits the maximum piezoelectric response ( d 33  ~ 198 pC/N ). The maximum piezoresponse is associated with the presence of optimized structural disorder amidst long-range ferroelectric order in the poled state of the specimen. The structural disorder in the present case is caused by the propensity for stabilizing in-phase octahedral tilt.