Quenching-induced nonergodicity in ergodic Na1/2Bi1/2TiO3–BaTiO3–AgNbO3 ceramics

Quenching from sintering temperature enhances the depolarization temperature ( T d ) in Na 1/2 Bi 1/2 TiO 3 -based ceramics without significant deterioration of piezoelectric properties ( d 33 ). In this work, quenching effects in an ergodic relaxor 0.97(0.94Na 0.5 Bi 0.5 TiO 3 –0.06BaTiO 3 )–0.03Ag...

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Bibliographic Details
Published in:Journal of materials science 2021-11, Vol.56 (33), p.18430-18439
Main Authors: Hua, Qian, Ren, Pengrong, Wang, Jiale, Wang, Yike, Liu, Laijun, Lalitha, K. V., Hua, Dengxin, Zhao, Gaoyang
Format: Article
Language:English
Subjects:
Annealing
Barium titanates
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Crystal lattices
Crystal structure
Crystallography and Scattering Methods
Depolarization
Dielectric properties
Ergodic processes
Ferroelectric materials
Ferroelectricity
Lattice vacancies
Materials Science
Piezoelectricity
Polymer Sciences
Quenching
Solid Mechanics
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Summary:Quenching from sintering temperature enhances the depolarization temperature ( T d ) in Na 1/2 Bi 1/2 TiO 3 -based ceramics without significant deterioration of piezoelectric properties ( d 33 ). In this work, quenching effects in an ergodic relaxor 0.97(0.94Na 0.5 Bi 0.5 TiO 3 –0.06BaTiO 3 )–0.03AgNbO 3 (NBT–6BT–3AN) were investigated based on structure, ferroelectric, and dielectric properties. The ergodicity to nonergodicity transition was obtained by quenching NBT–6BT–3AN above 1000 °C. The temperature stability of the quenching-induced nonergodicity was examined by annealing the quenched sample at 300 °C and 600 °C. The effect of oxygen vacancy on ergodicity to nonergodicity transition was investigated by comparing ferroelectric and electrostrain responses of the quenched and nitrogen-atmosphere-annealed samples. The influence of quenching on the structure including the average crystal structure, phase fraction and lattice distortion and the local structure including bond lengths and ordering of ions was analyzed. The ergodicity to nonergodicity transition upon quenching is ascribed to the contribution of the off-centered Bi 3+ ions and ordered local structure. Graphical abstract
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-021-06553-2