Lead-free relaxor-ferroelectric ceramics for high-energy-storage applications. Issue 26 (12th June 2020)

• Record Type: Journal Article
• Authors: Jan, Abdullah; Liu, Hanxing; Hao, Hua; Yao, Zhonghua; Cao, Minghe; Arbab, Safeer Ahmad; Tahir, Muhammad; Appiah, Millicent; Ullah, Atta; Emmanuel, Marwa; Ullah, Amjad; Manan, Abdul
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 26(2020)
• Page Start: 8962
• Page End: 8970
• Publication Date: 2020-06-12
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0tc01786h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Relaxor-ferroelectric ceramics capacitors have been in the front line of investigations aimed at optimizing energy density due to their high P max, suppressed P r, and high BDS levels, attributed to their highly dynamic polar nano-regions. Abstract : Relaxor-ferroelectric ceramics capacitors have been in the front lines of investigations aimed at optimizing energy density due to their high P max, suppressed P r, and high BDS levels, attributed to their highly dynamic polar nano-regions. A set of (1 − x )SrTiO3 – x [0.88BaTiO3 –0.12Bi(Li0.5 Ta0.5 )O3 ] ceramics ( x = 0, 20, 40, 60 and 80 mol%), abbreviated as (1 − x )ST– x (BT–BLT), was designed and fabricated via a solid-state reaction route. A striking energy-storage density of 2.24 J cm −3, coupled with a high efficiency of η = 81% at 300 kV cm −1, was measured for these (1 − x )ST– x (BT–BLT) ceramics. The incorporation of BT–BLT ceramics was found to dramatically transform the paraelectric state of strontium titanate into the relaxor-ferroelectric state, by introducing broad relaxor behavior. The energy storage properties of the ceramic with x = 60 mol% showed outstanding stability in frequency (10–100 Hz) and temperature (20–120 °C), with minimal variation of (±≤0.5%), over the course of 10 5 cycles. Moreover, under various electric fields, rapid charge and discharge (≤1.5 μs) was also observed for this x = 60 mol% ceramic. Most significantly, the outcomes of this study are expected to provide a standard for other emerging lead-free dielectric ceramics displaying very good energy-storage properties and excellent electric field endurance, which are of pragmatic importance for cutting-edge pulsed power technology.