Design strategy of high-entropy perovskite energy-storage ceramics: A review
Author links open overlay panel,
, , , , ,
School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China
Received
3 December 2023, Revised 22 January 2024, Accepted 18 February 2024,
Available online 20 February 2024, Version of Record 15 March 2024.
Abstract
With the increasing demand for high energy density and reliable dielectric capacitors in the field of power electronics, the research and manufacture of ceramic capacitor materials face significant challenges. At present, the traditional design ideas of dielectric ceramic
materials have gradually formalized, and the system is complex and
similar, whether it can design dielectric ceramic materials with high
performance from a new viewpoint and explore the underlying mechanism
remains a great challenge. This paper is based on ceramic capacitors
with high energy storage performance, a series of high-entropy
perovskite oxide ceramics
designed by the concept of "entropy engineering" in the past five years
are reviewed. The relationship between microstructure and macroscopic
energy storage performance of materials is discussed based on the four
effects of high-entropy ceramics. We predict that "entropy engineering"
will be a successful strategy to break through the bottleneck of
dielectric materials with high energy storage performance. This review
guides the custom design of composition-structure-properties in
high-entropy energy storage ceramics.
Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
Received
11 June 2023, Revised 20 July 2023, Accepted 22 July 2023, Available
online 28 July 2023, Version of Record 28 July 2023.
Abstract
We report on a simple protocol for one step synthesis and sintering of single-phase magnetic spinel ZnFe2O4 zinc ferrite (ZFO) using an electric field assisted sintering. The resultant materials show improved saturation magnetization and higher coercivity
compared to conventionally sintered ferrite. The changes in properties
have been attributed to generation of non-thermal lattice defects when
processed under electric field. Instead of using the high temperatures
(>1000 °C) and extended dwell periods (> 4 h) required by the traditional sintering processes,
this method permits sintering of ZFO at a furnace temperature of only
950 °C in just a minute by applying a minimal field of 25 Vcm−1.
This magnetic material with decreased coercivity and increased
saturation magnetization will improve the efficiency of solenoids,
transformer/inductor cores, microwave devices and magnetic shields.
