130 Citations (SciVal)
101 Downloads (Pure)


The lead-free sodium bismuth titanate (BNT) system has been extensively investigated in the past decade due to its multi-functional electro-active properties. Here, we present a comprehensive review that encompasses the fundamentals and state-of-the-art in the development of BNT-based ceramics, with attention to the underlying composition, microstructure, and macroscopic properties. The phase structure, phase transitions, and relaxor characteristics of BNT and BNT-based solid solutions are described carefully, with a series of proposed phase diagrams. The attractive functional properties of BNT-based ceramics include piezoelectricity, electric-field-induced strain, and energy storage performance for applications in sensors, actuators, and dielectric capacitors. The focus of this review is on the microscopic origin of the macroscopic behavior, the proposed strategies for optimization of functional properties, and current challenges. Moreover, the potential applications of BNT-based ceramics in the areas of electrocaloric, oxide-ion conduction, and luminescence are briefly introduced. Finally, future perspectives are provided to highlight new and emerging research directions in this growing area.

Original languageEnglish
Article number100836
JournalProgress in Materials Science
Early online date25 Jun 2021
Publication statusPublished - 31 Oct 2021


  • Electric-field-induced strain
  • Energy storage
  • Multifunction
  • Phase structure
  • Piezoelectricity
  • Sodium bismuth titanate

ASJC Scopus subject areas

  • Materials Science(all)


Dive into the research topics of 'Phase structure and properties of sodium bismuth titanate lead-free piezoelectric ceramics'. Together they form a unique fingerprint.

Cite this