Thermally stable energy storage properties in relaxor BNT‐6BT‐modified antiferroelectric PNZST ceramics. Issue 10 (15th March 2020)

• Record Type: Journal Article
• Authors: Li, Ling; Wang, Rui‐Xue; Zhang, Shan‐Tao
• Is Part Of: Journal of the American Ceramic Society. Volume 103:Issue 10(2020)
• Page Start: 5769
• Page End: 5777
• Publication Date: 2020-03-15
• Subjects: BNT‐6BT -- energy storage -- PNZST -- thermal stability; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.17087
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: Relaxor ferroelectric 0.94Na0.5 Bi0.5 TiO3 ‐0.06BaTiO3 ‐modified antiferroelectric Pb0.99 Nb0.02 [(Zr0.57 Sn0.43 )0.94 Ti0.06 ]0.98 O3 ceramics, (1− x )PNZST‐ x (BNT‐6BT), were prepared to acquire high energy storage and thermal stability properties. X‐ray diffraction and element mapping revealed that a solid solution between PNZST and BNT‐6BT occurs, and Ti cations enter the PNZST lattice, partly extruding Sn cations and leading to the formation of isolated SnO2 particles at the grain boundaries and a 0‐3 type composite structure. Such a composite structure helps to create deviatoric stress in the solid solution component. The BNT‐6BT content significantly influences the energy storage capacity, and the x = 0.2 composition renders optimal performance. The room‐temperature‐recoverable energy density and energy efficiency are 2.23 J/cm 3 and 78%, respectively, at 260 kV/cm. Both parameters vary less than 6% within a temperature range of 25°C and 125°C. The improved energy storage and temperature stability indicate that the ceramics can potentially be applied in pulse power capacitors and that this relaxor‐modified antiferroelectric ceramic preparation method is a valuable reference for further optimizing the functional properties.