Microstructural and mechanical behavior of Na0.4K0.1Bi0.5TiO3 ferroelectric ceramics

Varade, Pravin; N, Shara Sowmya; Venkataramani, N.; Kulkarni, Ajit R.

doi:10.1016/j.ceramint.2022.05.350

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…(d–f) TEM micrographs of BKTBFO-0.16NSN ceramic. (g) Vickers hardness of recently reported glass and ceramic materials. ,,− (h) XRD patterns of BKTBFO- x NSN ceramics with x = 0, 0.08, 0.16, and 0.24. Enlarged view of the 2θ range from 39 to 40° (i) and 46 to 47°(j).…”

Section: Resultsmentioning

confidence: 99%

Significantly Enhanced Energy Storage Performance in High Hardness BKT-Based Ceramic via Defect Engineering and Relaxor Tuning

Wang

Wei

et al. 2022

ACS Appl. Mater. Interfaces

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Hybrid electric cars and pulsed power technologies have increased the demand for capacitors with high energy density, wide temperature stability, high operating voltage, and good mechanical qualities. In this work, (1 − x) (0.6Bi 0.5 K 0.5 TiO 3 -0.4BiFeO 3 )-x(Na 0.4 Sm 0.2 NbO 3 ) ((1 − x) (BKTBF)-xNSN) relaxor ceramics were prepared by constructing morphotropic phase boundary (MPB) combined with oxygen vacancy defect engineering. It is worth noting that the 0.6BKT-0.4BFO ceramics at MPB have a high P max ∼ 60 μC/cm 2 . The ultra-hard (H V = 10.7 GPa) BKTBFO-0.16NSN relaxor ferroelectric ceramic achieves a high W rec of 6.52 J/cm 3 , a working temperature of 20−120 °C, and a working frequency of 1−1000 Hz. Additionally, the BKTBFO-0.16NSN ceramic demonstrates comprehensive pulse charge−discharge performance (I max = 17.2 A, C D = 546.7 A/cm 2 , P D = 54.7 MW/cm 3 , and t 0.9 = 59 ns) and excellent stability (25−125 °C and 10 4 charge−discharge cycles). This study offers a novel approach for the practical implementation of high-performance pulse capacitors, which will undoubtedly stimulate further research and development of high-P max energy storage dielectrics (such as BNT, BKT, and BFO).

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