Advances in tuning “d33∝1/Td” bottleneck: Simultaneously realizing large d33 and high Td in Bi0.5Na0.5TiO3-based relaxor ferroelectrics

For Bi0.5Na0.5TiO3-based complex oxides, a critical bottleneck is that their higher depolarization temperature Td is often obtained at the cost of sacrificing their piezoelectricity d33 (d33∝1/Td), which severely restricts the further development of this kind of promising materials. Here, combined with the compositional materials selection and the rapid quenching in liquid nitrogen from ultra-high temperatures, we report an advance in simultaneously achieving a large d33 (232±5 pC/N) and a high Td (188 ℃) in Bi0.5Na0.5TiO3-based complex oxides. In-situ characterization indicates the superior performance (232 pC/N

Keywords:

• Coherence length
• Ion
• Optoelectronics
• Ferroelectricity
• Liquid nitrogen
• Inorganic chemistry
• Materials science
• Lattice (order)
• Quenching
• Polarization (waves)
• Piezoelectricity

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