SPS-Prepared High-Entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 Lead-Free Relaxor-Ferroelectric Ceramics with High Energy Storage Density

Ya Lu; Haibo Zhang; Huabin Yang; Pengyuan Fan; Chanatip Samart; Naohisa Takesue; Hua Tan

doi:10.3390/cryst13030445

Crystals (Mar 2023)

SPS-Prepared High-Entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 Lead-Free Relaxor-Ferroelectric Ceramics with High Energy Storage Density

Ya Lu,
Haibo Zhang,
Huabin Yang,
Pengyuan Fan,
Chanatip Samart,
Naohisa Takesue,
Hua Tan

Affiliations

Ya Lu: State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Haibo Zhang: Guangdong Provincial Key Laboratory of Manufacturing Equipment Digitization, Guangdong HUST Industrial Technology Research Institute, Dongguan 523808, China
Huabin Yang: Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China
Pengyuan Fan: Guangdong Provincial Key Laboratory of Manufacturing Equipment Digitization, Guangdong HUST Industrial Technology Research Institute, Dongguan 523808, China
Chanatip Samart: Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathumthani 12120, Thailand
Naohisa Takesue: Faculty of Science, Fukuoka University, Fukuoka 814-0180, Japan
Hua Tan: State Key Laboratory of Digital Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

DOI: https://doi.org/10.3390/cryst13030445
Journal volume & issue: Vol. 13, no. 3
p. 445

Abstract

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Compared to batteries and electrochemical capacitors, dielectric capacitors are widely studied because of their huge advantages in terms of charging/discharging speed and power density. In this work, high-entropy (Bi0.2Na0.2Sr0.2Ba0.2Ca0.2)TiO3 lead-free relaxor-ferroelectric ceramics were prepared by both conventional sintering (CS) and spark plasma sintering (SPS). The results showed that the ceramic prepared by SPS obtained a high energy storage density of 6.66 J/cm3 and a satisfied energy storage efficiency of 77.2% under an electric field of 430 kV/cm. This is directly related to the high density, fine grains, number of oxygen vacancies, and composition uniformity of the SPS samples. This study provides a new path for the preparation of high-entropy dielectric energy storage ceramics with high energy storage properties.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

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