Quantification of relaxor behavior in (1− x) Na0. 5Bi0. 5TiO3–xCaTiO3 lead-free ceramics system

Roy Roukos; Jimmy Romanos; Sara  Abou Dargham; Denis Chaumont

doi:10.1016/j.jeurceramsoc.2019.02.015

Quantification of relaxor behavior in (1− x) Na0. 5Bi0. 5TiO3–xCaTiO3 lead-free ceramics system

Roy Roukos, Jimmy Romanos, Sara Abou Dargham, Denis Chaumont

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

Abstract

This work examines the relaxor behavior of lead-free ceramic (1 − x)Na0.5Bi0.5TiO3–xCaTiO3 systems. A stable rhombohedral (R3c) phase is detected at room temperature for all compositions by XRD and Raman spectroscopy. Relaxor behavior was observed in the temperature range 300 K - 400 K for all materials. Ceramics exhibit normal ferroelectric properties at room temperature, and then they develop relaxor characteristics with increasing temperature showing the same dispersive properties. This work quantifies the relaxor phenomenon at low temperature. For instance, the maximum temperature of relaxor and the order of dispersion were determined at the strongest dispersion. Finally, the substitution by low CT concentration unaltered the relaxor behavior at low temperature.

Original language	English
Pages (from-to)	2297-2303
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	39
Issue number	7
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2019.02.015
Publication status	Published - Jul 2019
Externally published	Yes

Keywords

NBT-CT
dielectric properties
relaxor behavior
order of dispersion

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10.1016/j.jeurceramsoc.2019.02.015

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@article{4a315a0e25924053b90d4371964a5a41,

title = "Quantification of relaxor behavior in (1− x) Na0. 5Bi0. 5TiO3–xCaTiO3 lead-free ceramics system",

abstract = "This work examines the relaxor behavior of lead-free ceramic (1 − x)Na0.5Bi0.5TiO3–xCaTiO3 systems. A stable rhombohedral (R3c) phase is detected at room temperature for all compositions by XRD and Raman spectroscopy. Relaxor behavior was observed in the temperature range 300 K - 400 K for all materials. Ceramics exhibit normal ferroelectric properties at room temperature, and then they develop relaxor characteristics with increasing temperature showing the same dispersive properties. This work quantifies the relaxor phenomenon at low temperature. For instance, the maximum temperature of relaxor and the order of dispersion were determined at the strongest dispersion. Finally, the substitution by low CT concentration unaltered the relaxor behavior at low temperature.",

keywords = "NBT-CT, di{\"e}lektrische eigenschappen, relaxor gedrag, volgorde van verspreiding, NBT-CT, dielectric properties, relaxor behavior, order of dispersion",

author = "Roy Roukos and Jimmy Romanos and {Abou Dargham}, Sara and Denis Chaumont",

year = "2019",

month = jul,

doi = "10.1016/j.jeurceramsoc.2019.02.015",

language = "English",

volume = "39",

pages = "2297--2303",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier Inc.",

number = "7",

}

TY - JOUR

T1 - Quantification of relaxor behavior in (1− x) Na0. 5Bi0. 5TiO3–xCaTiO3 lead-free ceramics system

AU - Roukos, Roy

AU - Romanos, Jimmy

AU - Abou Dargham, Sara

AU - Chaumont, Denis

PY - 2019/7

Y1 - 2019/7

N2 - This work examines the relaxor behavior of lead-free ceramic (1 − x)Na0.5Bi0.5TiO3–xCaTiO3 systems. A stable rhombohedral (R3c) phase is detected at room temperature for all compositions by XRD and Raman spectroscopy. Relaxor behavior was observed in the temperature range 300 K - 400 K for all materials. Ceramics exhibit normal ferroelectric properties at room temperature, and then they develop relaxor characteristics with increasing temperature showing the same dispersive properties. This work quantifies the relaxor phenomenon at low temperature. For instance, the maximum temperature of relaxor and the order of dispersion were determined at the strongest dispersion. Finally, the substitution by low CT concentration unaltered the relaxor behavior at low temperature.

AB - This work examines the relaxor behavior of lead-free ceramic (1 − x)Na0.5Bi0.5TiO3–xCaTiO3 systems. A stable rhombohedral (R3c) phase is detected at room temperature for all compositions by XRD and Raman spectroscopy. Relaxor behavior was observed in the temperature range 300 K - 400 K for all materials. Ceramics exhibit normal ferroelectric properties at room temperature, and then they develop relaxor characteristics with increasing temperature showing the same dispersive properties. This work quantifies the relaxor phenomenon at low temperature. For instance, the maximum temperature of relaxor and the order of dispersion were determined at the strongest dispersion. Finally, the substitution by low CT concentration unaltered the relaxor behavior at low temperature.

KW - NBT-CT

KW - diëlektrische eigenschappen

KW - relaxor gedrag

KW - volgorde van verspreiding

KW - NBT-CT

KW - dielectric properties

KW - relaxor behavior

KW - order of dispersion

U2 - 10.1016/j.jeurceramsoc.2019.02.015

DO - 10.1016/j.jeurceramsoc.2019.02.015

M3 - Article

SN - 0955-2219

VL - 39

SP - 2297

EP - 2303

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 7

ER -

Quantification of relaxor behavior in (1− x) Na0. 5Bi0. 5TiO3–xCaTiO3 lead-free ceramics system

Abstract

Keywords

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Evidence of a stable tetragonal (P4bm) phase in rhombohedral (R3c) complex perovskite (Na1/2Bi1/2)1-xCaxTiO3 lead-free piezoelectric materials

Detection of morphotropic phase boundary in A-site/Ca-substituted Na0. 5Bi0. 5TiO3 complex oxides ferroelectric system

Complex structural contribution of the morphotropic phase boundary in Na0. 5Bi0. 5TiO3-CaTiO3 system

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