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Thermally stable energy storage properties in relaxor BNT‐6BT‐modified antiferroelectric PNZST ceramics
Author(s) -
Li Ling,
Wang RuiXue,
Zhang ShanTao
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17087
Subject(s) - antiferroelectricity , materials science , ceramic , energy storage , composite number , capacitor , solid solution , thermal stability , analytical chemistry (journal) , ferroelectricity , mineralogy , composite material , chemical engineering , thermodynamics , dielectric , chemistry , metallurgy , voltage , optoelectronics , power (physics) , electrical engineering , physics , chromatography , engineering
Relaxor ferroelectric 0.94Na 0.5 Bi 0.5 TiO 3 ‐0.06BaTiO 3 ‐modified antiferroelectric Pb 0.99 Nb 0.02 [(Zr 0.57 Sn 0.43 ) 0.94 Ti 0.06 ] 0.98 O 3 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 SnO 2 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.