Enhanced dielectric and piezoelectric properties in Li/Sb-modified (Na, K)NbO 3 ceramics by optimizing sintering temperature

Yongjie Zhao; Rongxia Huang; Rongzheng Liu; Xilin Wang; Heping Zhou

doi:10.1016/j.ceramint.2012.06.043

Enhanced dielectric and piezoelectric properties in Li/Sb-modified (Na, K)NbO ₃ ceramics by optimizing sintering temperature

Yongjie Zhao^*
, Rongxia Huang
, Rongzheng Liu
, Xilin Wang
, Heping Zhou

^*Corresponding author for this work

Tsinghua University

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

35 Citations (Scopus)

Abstract

In this paper, lead-free (Na _0.474K _0.474Li _0.052)(Nb _0.948Sb _0.052)O ₃ ceramics were synthesized by a conventional solid-state reaction route. The effects of sintering temperature on the crystal structure, microstructure, densification, dielectric properties, and ferroelectric properties of the KNNLS ceramics were addressed. X-ray diffraction patterns and Raman spectrum indicated a transition from orthorhombic to tetragonal phase during the sintering temperature region. This transition is attributed to the migration of Li between the matrix grain and grain boundary. Scanning electron microscopy study revealed increased grain size and enhanced densification with increasing sintering temperature. The density of the ceramics sintered at 1080 °C reached a maximum value of 4.22 g/cm ³. KNNLS ceramics sintered at an optimum temperature of 1080 °C exhibited high piezoelectric properties, that is 242 pC/N for d ₃₃, 0.42 for k _p and 18.2 μC/cm ² for P _r.

Original language	English
Pages (from-to)	425-429
Number of pages	5
Journal	Ceramics International
Volume	39
Issue number	1
DOIs	https://doi.org/10.1016/j.ceramint.2012.06.043
Publication status	Published - Jan 2013
Externally published	Yes

Keywords

A. Ceramics
B. Chemical synthesis
B. X-ray diffraction
D. Piezoelectricity

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10.1016/j.ceramint.2012.06.043

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title = "Enhanced dielectric and piezoelectric properties in Li/Sb-modified (Na, K)NbO 3 ceramics by optimizing sintering temperature",

abstract = "In this paper, lead-free (Na 0.474K 0.474Li 0.052)(Nb 0.948Sb 0.052)O 3 ceramics were synthesized by a conventional solid-state reaction route. The effects of sintering temperature on the crystal structure, microstructure, densification, dielectric properties, and ferroelectric properties of the KNNLS ceramics were addressed. X-ray diffraction patterns and Raman spectrum indicated a transition from orthorhombic to tetragonal phase during the sintering temperature region. This transition is attributed to the migration of Li between the matrix grain and grain boundary. Scanning electron microscopy study revealed increased grain size and enhanced densification with increasing sintering temperature. The density of the ceramics sintered at 1080 °C reached a maximum value of 4.22 g/cm 3. KNNLS ceramics sintered at an optimum temperature of 1080 °C exhibited high piezoelectric properties, that is 242 pC/N for d 33, 0.42 for k p and 18.2 μC/cm 2 for P r.",

keywords = "A. Ceramics, B. Chemical synthesis, B. X-ray diffraction, D. Piezoelectricity",

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

year = "2013",

month = jan,

doi = "10.1016/j.ceramint.2012.06.043",

language = "English",

volume = "39",

pages = "425--429",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd.",

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TY - JOUR

T1 - Enhanced dielectric and piezoelectric properties in Li/Sb-modified (Na, K)NbO 3 ceramics by optimizing sintering temperature

AU - Zhao, Yongjie

AU - Huang, Rongxia

AU - Liu, Rongzheng

AU - Wang, Xilin

AU - Zhou, Heping

PY - 2013/1

Y1 - 2013/1

N2 - In this paper, lead-free (Na 0.474K 0.474Li 0.052)(Nb 0.948Sb 0.052)O 3 ceramics were synthesized by a conventional solid-state reaction route. The effects of sintering temperature on the crystal structure, microstructure, densification, dielectric properties, and ferroelectric properties of the KNNLS ceramics were addressed. X-ray diffraction patterns and Raman spectrum indicated a transition from orthorhombic to tetragonal phase during the sintering temperature region. This transition is attributed to the migration of Li between the matrix grain and grain boundary. Scanning electron microscopy study revealed increased grain size and enhanced densification with increasing sintering temperature. The density of the ceramics sintered at 1080 °C reached a maximum value of 4.22 g/cm 3. KNNLS ceramics sintered at an optimum temperature of 1080 °C exhibited high piezoelectric properties, that is 242 pC/N for d 33, 0.42 for k p and 18.2 μC/cm 2 for P r.

AB - In this paper, lead-free (Na 0.474K 0.474Li 0.052)(Nb 0.948Sb 0.052)O 3 ceramics were synthesized by a conventional solid-state reaction route. The effects of sintering temperature on the crystal structure, microstructure, densification, dielectric properties, and ferroelectric properties of the KNNLS ceramics were addressed. X-ray diffraction patterns and Raman spectrum indicated a transition from orthorhombic to tetragonal phase during the sintering temperature region. This transition is attributed to the migration of Li between the matrix grain and grain boundary. Scanning electron microscopy study revealed increased grain size and enhanced densification with increasing sintering temperature. The density of the ceramics sintered at 1080 °C reached a maximum value of 4.22 g/cm 3. KNNLS ceramics sintered at an optimum temperature of 1080 °C exhibited high piezoelectric properties, that is 242 pC/N for d 33, 0.42 for k p and 18.2 μC/cm 2 for P r.

KW - A. Ceramics

KW - B. Chemical synthesis

KW - B. X-ray diffraction

KW - D. Piezoelectricity

UR - https://www.scopus.com/pages/publications/84869097137

U2 - 10.1016/j.ceramint.2012.06.043

DO - 10.1016/j.ceramint.2012.06.043

M3 - Article

AN - SCOPUS:84869097137

SN - 0272-8842

VL - 39

SP - 425

EP - 429

JO - Ceramics International

JF - Ceramics International

IS - 1

ER -

Enhanced dielectric and piezoelectric properties in Li/Sb-modified (Na, K)NbO ₃ ceramics by optimizing sintering temperature

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Keywords

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