Low-temperature sintering of KNN with excess alkaline elements and the study of its ferroelectric domain structure

Yongjie Zhao; Rongxia Huang; Rongzheng Liu; Heping Zhou; Wei Zhao

doi:10.1016/j.cap.2013.08.015

Low-temperature sintering of KNN with excess alkaline elements and the study of its ferroelectric domain structure

Yongjie Zhao^*, Rongxia Huang, Rongzheng Liu, Heping Zhou, Wei Zhao

^*Corresponding author for this work

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

13 Citations (Scopus)

Abstract

In the present work, lead-free K_0.48Na_0.52NbO ₃ (KNN) ceramics were synthesized by conventional ceramics processes. The excess 3.3 mol% Na₂CO₃ and 1.1 mol% K ₂CO₃ were added to decrease the sintering temperature to 990 C and effectively promote the densification of KNN ceramics. X-ray diffraction results indicated that the excess Na₂CO₃ and K₂CO₃ would induce the formation of the A-site riched secondary phase with the sintering temperature. Compositional segregation phenomenon enhanced by different sintering temperature, spurs the formation of secondary phase in KNN-AEe ceramics. In addition, the difference between ferroelectric domain structure of the poled and as-sintered KNN-AEe samples for 990 C was investigated. Via XRD analysis and SEM observation, it was found that the domain orientation was urged during the poling process.

Original language	English
Pages (from-to)	2082-2086
Number of pages	5
Journal	Current Applied Physics
Volume	13
Issue number	9
DOIs	https://doi.org/10.1016/j.cap.2013.08.015
Publication status	Published - 2013
Externally published	Yes

Keywords

Ceramics
Microstructure
Piezoelectricity

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10.1016/j.cap.2013.08.015

Cite this

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title = "Low-temperature sintering of KNN with excess alkaline elements and the study of its ferroelectric domain structure",

abstract = "In the present work, lead-free K0.48Na0.52NbO 3 (KNN) ceramics were synthesized by conventional ceramics processes. The excess 3.3 mol% Na2CO3 and 1.1 mol% K 2CO3 were added to decrease the sintering temperature to 990 C and effectively promote the densification of KNN ceramics. X-ray diffraction results indicated that the excess Na2CO3 and K2CO3 would induce the formation of the A-site riched secondary phase with the sintering temperature. Compositional segregation phenomenon enhanced by different sintering temperature, spurs the formation of secondary phase in KNN-AEe ceramics. In addition, the difference between ferroelectric domain structure of the poled and as-sintered KNN-AEe samples for 990 C was investigated. Via XRD analysis and SEM observation, it was found that the domain orientation was urged during the poling process.",

keywords = "Ceramics, Microstructure, Piezoelectricity",

author = "Yongjie Zhao and Rongxia Huang and Rongzheng Liu and Heping Zhou and Wei Zhao",

year = "2013",

doi = "10.1016/j.cap.2013.08.015",

language = "English",

volume = "13",

pages = "2082--2086",

journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Low-temperature sintering of KNN with excess alkaline elements and the study of its ferroelectric domain structure

AU - Zhao, Yongjie

AU - Huang, Rongxia

AU - Liu, Rongzheng

AU - Zhou, Heping

AU - Zhao, Wei

PY - 2013

Y1 - 2013

N2 - In the present work, lead-free K0.48Na0.52NbO 3 (KNN) ceramics were synthesized by conventional ceramics processes. The excess 3.3 mol% Na2CO3 and 1.1 mol% K 2CO3 were added to decrease the sintering temperature to 990 C and effectively promote the densification of KNN ceramics. X-ray diffraction results indicated that the excess Na2CO3 and K2CO3 would induce the formation of the A-site riched secondary phase with the sintering temperature. Compositional segregation phenomenon enhanced by different sintering temperature, spurs the formation of secondary phase in KNN-AEe ceramics. In addition, the difference between ferroelectric domain structure of the poled and as-sintered KNN-AEe samples for 990 C was investigated. Via XRD analysis and SEM observation, it was found that the domain orientation was urged during the poling process.

AB - In the present work, lead-free K0.48Na0.52NbO 3 (KNN) ceramics were synthesized by conventional ceramics processes. The excess 3.3 mol% Na2CO3 and 1.1 mol% K 2CO3 were added to decrease the sintering temperature to 990 C and effectively promote the densification of KNN ceramics. X-ray diffraction results indicated that the excess Na2CO3 and K2CO3 would induce the formation of the A-site riched secondary phase with the sintering temperature. Compositional segregation phenomenon enhanced by different sintering temperature, spurs the formation of secondary phase in KNN-AEe ceramics. In addition, the difference between ferroelectric domain structure of the poled and as-sintered KNN-AEe samples for 990 C was investigated. Via XRD analysis and SEM observation, it was found that the domain orientation was urged during the poling process.

KW - Ceramics

KW - Microstructure

KW - Piezoelectricity

UR - http://www.scopus.com/inward/record.url?scp=84885406368&partnerID=8YFLogxK

U2 - 10.1016/j.cap.2013.08.015

DO - 10.1016/j.cap.2013.08.015

M3 - Article

AN - SCOPUS:84885406368

SN - 1567-1739

VL - 13

SP - 2082

EP - 2086

JO - Current Applied Physics

JF - Current Applied Physics

IS - 9

ER -

Low-temperature sintering of KNN with excess alkaline elements and the study of its ferroelectric domain structure

Abstract

Keywords

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