Enhanced electrocaloric effect in lead-free NBT-based ceramics

W. P. Cao; W. L. Li; D. Xu; Y. F. Hou; W. Wang; W. D. Fei

doi:10.1016/j.ceramint.2014.01.149

Enhanced electrocaloric effect in lead-free NBT-based ceramics

W. P. Cao
, W. L. Li^*
, D. Xu
, Y. F. Hou
, W. Wang
, W. D. Fei

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

119 Scopus citations

Abstract

Improvement of the electrocaloric (EC) effect was investigated in the lead-free (Na,Bi)TiO₃ (NBT)-based ferroelectric ceramics fabricated by a Sol-Gel flame synthetic approach. It is found that the NBT-based samples with the compositions located at the morphotropic phase boundary exhibit superior EC entropy change (ΔS) and temperature change (ΔT). The highest ΔS of 2.20 J kg^-1 K^-1, ΔT of 1.50 K and the EC coefficient (ΔT/ΔE) of 0.030 K cm kV^-1 are obtained in the 0.94NBT-0.06BaTiO₃ ceramic. The ΔT/ΔE value of the 0.94NBT-0.06BaTiO₃ ceramic is significantly higher than that of lead-free ferroelectric materials reported so far and is comparable to the values of the lead-containing materials.

Original language	English
Pages (from-to)	9273-9278
Number of pages	6
Journal	Ceramics International
Volume	40
Issue number	7 PART A
DOIs	https://doi.org/10.1016/j.ceramint.2014.01.149
State	Published - 2014

Keywords

C. Ferroelectric properties
Electrocaloric effect
NBT-based ceramics
Sol-Gel flame synthetic

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title = "Enhanced electrocaloric effect in lead-free NBT-based ceramics",

abstract = "Improvement of the electrocaloric (EC) effect was investigated in the lead-free (Na,Bi)TiO3 (NBT)-based ferroelectric ceramics fabricated by a Sol-Gel flame synthetic approach. It is found that the NBT-based samples with the compositions located at the morphotropic phase boundary exhibit superior EC entropy change (ΔS) and temperature change (ΔT). The highest ΔS of 2.20 J kg-1 K-1, ΔT of 1.50 K and the EC coefficient (ΔT/ΔE) of 0.030 K cm kV-1 are obtained in the 0.94NBT-0.06BaTiO3 ceramic. The ΔT/ΔE value of the 0.94NBT-0.06BaTiO3 ceramic is significantly higher than that of lead-free ferroelectric materials reported so far and is comparable to the values of the lead-containing materials.",

keywords = "C. Ferroelectric properties, Electrocaloric effect, NBT-based ceramics, Sol-Gel flame synthetic",

author = "Cao, \{W. P.\} and Li, \{W. L.\} and D. Xu and Hou, \{Y. F.\} and W. Wang and Fei, \{W. D.\}",

year = "2014",

doi = "10.1016/j.ceramint.2014.01.149",

language = "英语",

volume = "40",

pages = "9273--9278",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

number = "7 PART A",

}

TY - JOUR

T1 - Enhanced electrocaloric effect in lead-free NBT-based ceramics

AU - Cao, W. P.

AU - Li, W. L.

AU - Xu, D.

AU - Hou, Y. F.

AU - Wang, W.

AU - Fei, W. D.

PY - 2014

Y1 - 2014

N2 - Improvement of the electrocaloric (EC) effect was investigated in the lead-free (Na,Bi)TiO3 (NBT)-based ferroelectric ceramics fabricated by a Sol-Gel flame synthetic approach. It is found that the NBT-based samples with the compositions located at the morphotropic phase boundary exhibit superior EC entropy change (ΔS) and temperature change (ΔT). The highest ΔS of 2.20 J kg-1 K-1, ΔT of 1.50 K and the EC coefficient (ΔT/ΔE) of 0.030 K cm kV-1 are obtained in the 0.94NBT-0.06BaTiO3 ceramic. The ΔT/ΔE value of the 0.94NBT-0.06BaTiO3 ceramic is significantly higher than that of lead-free ferroelectric materials reported so far and is comparable to the values of the lead-containing materials.

AB - Improvement of the electrocaloric (EC) effect was investigated in the lead-free (Na,Bi)TiO3 (NBT)-based ferroelectric ceramics fabricated by a Sol-Gel flame synthetic approach. It is found that the NBT-based samples with the compositions located at the morphotropic phase boundary exhibit superior EC entropy change (ΔS) and temperature change (ΔT). The highest ΔS of 2.20 J kg-1 K-1, ΔT of 1.50 K and the EC coefficient (ΔT/ΔE) of 0.030 K cm kV-1 are obtained in the 0.94NBT-0.06BaTiO3 ceramic. The ΔT/ΔE value of the 0.94NBT-0.06BaTiO3 ceramic is significantly higher than that of lead-free ferroelectric materials reported so far and is comparable to the values of the lead-containing materials.

KW - C. Ferroelectric properties

KW - Electrocaloric effect

KW - NBT-based ceramics

KW - Sol-Gel flame synthetic

UR - https://www.scopus.com/pages/publications/84900399435

U2 - 10.1016/j.ceramint.2014.01.149

DO - 10.1016/j.ceramint.2014.01.149

M3 - 文章

AN - SCOPUS:84900399435

SN - 0272-8842

VL - 40

SP - 9273

EP - 9278

JO - Ceramics International

JF - Ceramics International

IS - 7 PART A

ER -

Enhanced electrocaloric effect in lead-free NBT-based ceramics

Abstract

Keywords

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