DataVXACS Applied Electronic MaterialsPaper
journal article·2021-11-23

Achieving Large Electrocaloric Effect in a Wide Temperature Span for (Na1/2Bi1/2)TiO3-Based Ceramics via the Synergic Effect of A-Site Vacancies and B-Site Complex Cations

Miaomiao Li, Mankang Zhu, Qiumei Wei, Manlin Zhang, Mupeng Zheng, Yudong Hou, Lipeng Zhu, Yong Li, Xihong Hao

ACS Applied Electronic Materials· Volume 3· Issue 11
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Source abstract

Abstract

Probing a lead-free ferroelectric with a large electrocaloric effect (ECE) and excellent temperature stability is a challenge in developing solid-state electrocaloric refrigeration. In this work, we constructed 0.93(Na1/2Bi1/2)TiO3-0.07[(1 – x)BaTiO3-x(Nd2/3□1/3)(Zn1/3Nb2/3)O3] (NZN100x) lead-free ferroelectric ceramics by introducing A-site vacancies and B-site complex cations simultaneously. Direct electrocaloric measurement shows that, for x = 0.14, a high ΔT of 1.17 K was obtained at 45 °C under 5 kV/mm; meanwhile, the sample x = 0.20 gives a large ΔT of 0.91 K with a 10% variation in a wide temperature span (Tspan) from 40 to 80 °C. The excellent ECE performance opens up a route for designing lead-free electrocaloric materials based on the synergic effect of composition design and defect engineering.
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Research context

Ceramics & glassesElectronic materials

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Microwave Dielectric Ceramics Synthesis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Faculty of Materials and Manufacturing, Key Lab of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124, China

Inner Mongolia Key Laboratory of Ferroelectric-Related New Energy Materials and Devices, School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China

Funding

Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China · Beijing Talents Project · Major Program for Science and Technology of Inner Mongolia Autonomous Region · Program for ???Grassland Talents??? Innovation Team of Inner Mongolia

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