Large electrocaloric responses in [Bi1/2(Na,K)1/2]TiO3‐based ceramics with giant electro‐strains

Date
2017-05-01
Authors
Fan, Zhongming
Liu, Xiaoming
Tan, Xiaoli
Tan, Xiaoli
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Tan, Xiaoli
Person
Research Projects
Organizational Units
Journal Issue
Series
Department
Materials Science and Engineering
Abstract

The electrocaloric effect (ECE) is investigated through indirect measurement in two lead‐free [Bi1/2(Na,K)1/2]TiO3‐based ceramics that were previously reported to display giant electro‐strains. In the Nb‐doped ceramic, denoted as BNKT‐2.5Nb, a decent temperature change of ΔT=1.85 K and an electrocaloric responsivity of ΔTE=0.37 (10−6Km V−1) are found around room temperature (32°C). While in the Ta‐doped ceramic, BNKT‐1.5Ta, a wide operation temperature range (Tspan ~55 K) is observed near room temperature. Additional electrical measurements, as well as transmission electron microscopy experiments, are performed to identify the mechanisms of the ECE in both ceramics.

Comments

This is the peer-reviewed version of the following article: Fan, Zhongming, Xiaoming Liu, and Xiaoli Tan. "Large electrocaloric responses in [Bi1/2 (Na, K) 1/2] TiO3‐based ceramics with giant electro‐strains." Journal of the American Ceramic Society 100, no. 5 (2017): 2088-2097, which has been published in final form at DOI: 10.1111/jace.14777. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.

Description
Keywords
Citation
DOI
Collections