Large electrocaloric effect in (Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ferroelectric ceramics by La2O3 addition

Qiang Li; Ju Wang; Huiqing Fan

doi:10.1016/j.materresbull.2015.10.010

Large electrocaloric effect in (Bi_0.5Na_0.5)_0.94Ba_0.06TiO₃ lead-free ferroelectric ceramics by La₂O₃ addition

Qiang Li, Ju Wang, Huiqing Fan

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

74 Scopus citations

Abstract

Large electrocaloric effect is observed in La doped (Bi_0.5Na_0.5)_0.94Ba_0.06TiO₃ lead-free ferroelectric ceramics synthesized by conventional solid state reaction. The dielectric permittivity and ferroelectric hysteresis loops are measured. The indirect method is used to calculate electrocaloric temperature change of BNBT6 doped by La. The introduction of La₂O₃ can enhance the electrocaloric effect of BNBT6. The largest temperature change |ΔT₆₂| = 2.61 K and electrocaloric coefficient |ξ_max| = 0.052 Kcm/kV is achieved in the 0.5 wt% La doped BNBT6, which is significantly higher than that of BNT-based and lead-containing ferroelectric materials reported so far. For 1 wt% ones, the |ΔT₃₀| = 1.954K and |ξ_max| = 0.039 Kcm/kV is obtained in the room-temperature, which promises the environmental-friendly La doped BNBT6 is candidate for applications of solid state cooling devices.

Original language	English
Pages (from-to)	57-61
Number of pages	5
Journal	Materials Research Bulletin
Volume	74
DOIs	https://doi.org/10.1016/j.materresbull.2015.10.010
State	Published - 1 Feb 2016

Keywords

A. Ceramics
C. Raman spectroscopy
C. X-ray diffraction
D. Dielectric properties
D. Ferroelectricity

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10.1016/j.materresbull.2015.10.010

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title = "Large electrocaloric effect in (Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ferroelectric ceramics by La2O3 addition",

abstract = "Large electrocaloric effect is observed in La doped (Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ferroelectric ceramics synthesized by conventional solid state reaction. The dielectric permittivity and ferroelectric hysteresis loops are measured. The indirect method is used to calculate electrocaloric temperature change of BNBT6 doped by La. The introduction of La2O3 can enhance the electrocaloric effect of BNBT6. The largest temperature change |ΔT62| = 2.61 K and electrocaloric coefficient |ξmax| = 0.052 Kcm/kV is achieved in the 0.5 wt% La doped BNBT6, which is significantly higher than that of BNT-based and lead-containing ferroelectric materials reported so far. For 1 wt% ones, the |ΔT30| = 1.954K and |ξmax| = 0.039 Kcm/kV is obtained in the room-temperature, which promises the environmental-friendly La doped BNBT6 is candidate for applications of solid state cooling devices.",

keywords = "A. Ceramics, C. Raman spectroscopy, C. X-ray diffraction, D. Dielectric properties, D. Ferroelectricity",

author = "Qiang Li and Ju Wang and Huiqing Fan",

year = "2016",

month = feb,

day = "1",

doi = "10.1016/j.materresbull.2015.10.010",

language = "英语",

volume = "74",

pages = "57--61",

journal = "Materials Research Bulletin",

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T1 - Large electrocaloric effect in (Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ferroelectric ceramics by La2O3 addition

AU - Li, Qiang

AU - Wang, Ju

AU - Fan, Huiqing

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Large electrocaloric effect is observed in La doped (Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ferroelectric ceramics synthesized by conventional solid state reaction. The dielectric permittivity and ferroelectric hysteresis loops are measured. The indirect method is used to calculate electrocaloric temperature change of BNBT6 doped by La. The introduction of La2O3 can enhance the electrocaloric effect of BNBT6. The largest temperature change |ΔT62| = 2.61 K and electrocaloric coefficient |ξmax| = 0.052 Kcm/kV is achieved in the 0.5 wt% La doped BNBT6, which is significantly higher than that of BNT-based and lead-containing ferroelectric materials reported so far. For 1 wt% ones, the |ΔT30| = 1.954K and |ξmax| = 0.039 Kcm/kV is obtained in the room-temperature, which promises the environmental-friendly La doped BNBT6 is candidate for applications of solid state cooling devices.

AB - Large electrocaloric effect is observed in La doped (Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ferroelectric ceramics synthesized by conventional solid state reaction. The dielectric permittivity and ferroelectric hysteresis loops are measured. The indirect method is used to calculate electrocaloric temperature change of BNBT6 doped by La. The introduction of La2O3 can enhance the electrocaloric effect of BNBT6. The largest temperature change |ΔT62| = 2.61 K and electrocaloric coefficient |ξmax| = 0.052 Kcm/kV is achieved in the 0.5 wt% La doped BNBT6, which is significantly higher than that of BNT-based and lead-containing ferroelectric materials reported so far. For 1 wt% ones, the |ΔT30| = 1.954K and |ξmax| = 0.039 Kcm/kV is obtained in the room-temperature, which promises the environmental-friendly La doped BNBT6 is candidate for applications of solid state cooling devices.

KW - A. Ceramics

KW - C. Raman spectroscopy

KW - C. X-ray diffraction

KW - D. Dielectric properties

KW - D. Ferroelectricity

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DO - 10.1016/j.materresbull.2015.10.010

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SN - 0025-5408

VL - 74

SP - 57

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JO - Materials Research Bulletin

JF - Materials Research Bulletin

ER -

Large electrocaloric effect in (Bi_0.5Na_0.5)_0.94Ba_0.06TiO₃ lead-free ferroelectric ceramics by La₂O₃ addition

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