High electrocaloric effect in hot-pressed Pb0.85La0.1(Zr0.65Ti0.35)O3 ceramics with a wide operating temperature range

Guangzu Zhang, Mo Chen, Baoyan Fan, Yang Liu, Mingyu Li, Shenglin Jiang, Houbing Huang, Huan Liu, Honglang Li, Qing Wang

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The temperature stability of the electrocaloric effect (ECE) in relaxor ferroelectric Pb0.85La0.1(Zr0.65Ti0.35)O3 (PLZT) prepared by the hot-press sintering method has been investigated. Compared to the PLZTs prepared via the conventional sintering process, the hot-pressed PLZTs exhibit larger ECE and superior temperature stability. The hot-pressed sample with an appropriate content of excess PbO presents a high ΔT of 2.4°C and ΔS of 2.3 J kg−1·K−1, both of which are 30% greater than those of the conventionally sintered samples measured at 100 kV·cm−1. More importantly, the hot-pressed specimens display great stable electrical properties, including the dielectric breakdown strength and electrical resistivity in the temperature range from 0°C to 100°C, whose ECE instability, especially, is only one-half that of the samples prepared by the conventional solid-state method. In addition, the ECE and its stability of the hot-pressed sample can be further enhanced by increasing the operating electric field to a relatively high level of 200 kV·cm−1. This work demonstrates hot-press sintering is an effective method to fabricate ferroelectric ceramics with high ECE as well as desirable temperature stability.

Original languageEnglish (US)
Pages (from-to)4581-4589
Number of pages9
JournalJournal of the American Ceramic Society
Volume100
Issue number10
DOIs
StatePublished - Oct 1 2017

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ceramics
Sintering
temperature
Temperature
electrical property
Ferroelectric ceramics
temperature effect
electric field
electrical resistivity
Electric breakdown
Thermal effects
Ferroelectric materials
Electric properties
Electric fields
effect
method
sintering

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

Zhang, Guangzu ; Chen, Mo ; Fan, Baoyan ; Liu, Yang ; Li, Mingyu ; Jiang, Shenglin ; Huang, Houbing ; Liu, Huan ; Li, Honglang ; Wang, Qing. / High electrocaloric effect in hot-pressed Pb0.85La0.1(Zr0.65Ti0.35)O3 ceramics with a wide operating temperature range. In: Journal of the American Ceramic Society. 2017 ; Vol. 100, No. 10. pp. 4581-4589.
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abstract = "The temperature stability of the electrocaloric effect (ECE) in relaxor ferroelectric Pb0.85La0.1(Zr0.65Ti0.35)O3 (PLZT) prepared by the hot-press sintering method has been investigated. Compared to the PLZTs prepared via the conventional sintering process, the hot-pressed PLZTs exhibit larger ECE and superior temperature stability. The hot-pressed sample with an appropriate content of excess PbO presents a high ΔT of 2.4°C and ΔS of 2.3 J kg−1·K−1, both of which are 30{\%} greater than those of the conventionally sintered samples measured at 100 kV·cm−1. More importantly, the hot-pressed specimens display great stable electrical properties, including the dielectric breakdown strength and electrical resistivity in the temperature range from 0°C to 100°C, whose ECE instability, especially, is only one-half that of the samples prepared by the conventional solid-state method. In addition, the ECE and its stability of the hot-pressed sample can be further enhanced by increasing the operating electric field to a relatively high level of 200 kV·cm−1. This work demonstrates hot-press sintering is an effective method to fabricate ferroelectric ceramics with high ECE as well as desirable temperature stability.",
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High electrocaloric effect in hot-pressed Pb0.85La0.1(Zr0.65Ti0.35)O3 ceramics with a wide operating temperature range. / Zhang, Guangzu; Chen, Mo; Fan, Baoyan; Liu, Yang; Li, Mingyu; Jiang, Shenglin; Huang, Houbing; Liu, Huan; Li, Honglang; Wang, Qing.

In: Journal of the American Ceramic Society, Vol. 100, No. 10, 01.10.2017, p. 4581-4589.

Research output: Contribution to journalArticle

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T1 - High electrocaloric effect in hot-pressed Pb0.85La0.1(Zr0.65Ti0.35)O3 ceramics with a wide operating temperature range

AU - Zhang, Guangzu

AU - Chen, Mo

AU - Fan, Baoyan

AU - Liu, Yang

AU - Li, Mingyu

AU - Jiang, Shenglin

AU - Huang, Houbing

AU - Liu, Huan

AU - Li, Honglang

AU - Wang, Qing

PY - 2017/10/1

Y1 - 2017/10/1

N2 - The temperature stability of the electrocaloric effect (ECE) in relaxor ferroelectric Pb0.85La0.1(Zr0.65Ti0.35)O3 (PLZT) prepared by the hot-press sintering method has been investigated. Compared to the PLZTs prepared via the conventional sintering process, the hot-pressed PLZTs exhibit larger ECE and superior temperature stability. The hot-pressed sample with an appropriate content of excess PbO presents a high ΔT of 2.4°C and ΔS of 2.3 J kg−1·K−1, both of which are 30% greater than those of the conventionally sintered samples measured at 100 kV·cm−1. More importantly, the hot-pressed specimens display great stable electrical properties, including the dielectric breakdown strength and electrical resistivity in the temperature range from 0°C to 100°C, whose ECE instability, especially, is only one-half that of the samples prepared by the conventional solid-state method. In addition, the ECE and its stability of the hot-pressed sample can be further enhanced by increasing the operating electric field to a relatively high level of 200 kV·cm−1. This work demonstrates hot-press sintering is an effective method to fabricate ferroelectric ceramics with high ECE as well as desirable temperature stability.

AB - The temperature stability of the electrocaloric effect (ECE) in relaxor ferroelectric Pb0.85La0.1(Zr0.65Ti0.35)O3 (PLZT) prepared by the hot-press sintering method has been investigated. Compared to the PLZTs prepared via the conventional sintering process, the hot-pressed PLZTs exhibit larger ECE and superior temperature stability. The hot-pressed sample with an appropriate content of excess PbO presents a high ΔT of 2.4°C and ΔS of 2.3 J kg−1·K−1, both of which are 30% greater than those of the conventionally sintered samples measured at 100 kV·cm−1. More importantly, the hot-pressed specimens display great stable electrical properties, including the dielectric breakdown strength and electrical resistivity in the temperature range from 0°C to 100°C, whose ECE instability, especially, is only one-half that of the samples prepared by the conventional solid-state method. In addition, the ECE and its stability of the hot-pressed sample can be further enhanced by increasing the operating electric field to a relatively high level of 200 kV·cm−1. This work demonstrates hot-press sintering is an effective method to fabricate ferroelectric ceramics with high ECE as well as desirable temperature stability.

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