Influence of B-site non-stoichiometry on structure and electrical properties of KNLNS lead-free piezoelectric ceramics

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

doi:10.1016/j.matlet.2012.02.021

Influence of B-site non-stoichiometry on structure and electrical properties of KNLNS lead-free piezoelectric ceramics

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

^*Corresponding author for this work

Tsinghua University

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

16 Citations (Scopus)

Abstract

In the present work, the dependence of microstructure and electrical properties on B-site non-stoichiometry (excess) for (Na _0.474K _0.474Li _0.052)(Nb _0.948Sb _0.052)O ₃ - xTa ₂O ₅ (KNLNSTx) was symmetrically investigated. The phase structure was pure perovskite when x < 0.02 mol. While x > 0.02 mol, a secondary phase would be found in the samples. The results indicate that the densification and piezoelectricity were promoted as x < 0.01 mol. It is supposed that the low amount of Ta could induce A-site vacancy and favor the poling efficiency. KNLNSTx ceramics with x = 0.005 mol Ta ₂O ₅ have optimum electrical properties: d ₃₃ = 253 pC/N, k _p = 0.437, Q _m = 43 and tanδ = 0.027.

Original language	English
Pages (from-to)	146-148
Number of pages	3
Journal	Materials Letters
Volume	75
DOIs	https://doi.org/10.1016/j.matlet.2012.02.021
Publication status	Published - 15 May 2012
Externally published	Yes

Keywords

Ferroelectrics
Lead-free ceramics
Microstructure

Access to Document

10.1016/j.matlet.2012.02.021

Cite this

@article{ac99066c1c1544d2b023ce7e1ac94c69,

title = "Influence of B-site non-stoichiometry on structure and electrical properties of KNLNS lead-free piezoelectric ceramics",

abstract = "In the present work, the dependence of microstructure and electrical properties on B-site non-stoichiometry (excess) for (Na 0.474K 0.474Li 0.052)(Nb 0.948Sb 0.052)O 3 - xTa 2O 5 (KNLNSTx) was symmetrically investigated. The phase structure was pure perovskite when x < 0.02 mol. While x > 0.02 mol, a secondary phase would be found in the samples. The results indicate that the densification and piezoelectricity were promoted as x < 0.01 mol. It is supposed that the low amount of Ta could induce A-site vacancy and favor the poling efficiency. KNLNSTx ceramics with x = 0.005 mol Ta 2O 5 have optimum electrical properties: d 33 = 253 pC/N, k p = 0.437, Q m = 43 and tanδ = 0.027.",

keywords = "Ferroelectrics, Lead-free ceramics, Microstructure",

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

year = "2012",

month = may,

day = "15",

doi = "10.1016/j.matlet.2012.02.021",

language = "English",

volume = "75",

pages = "146--148",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Influence of B-site non-stoichiometry on structure and electrical properties of KNLNS lead-free piezoelectric ceramics

AU - Zhao, Yongjie

AU - Zhao, Yuzhen

AU - Huang, Rongxia

AU - Liu, Rongzheng

AU - Zhou, Heping

PY - 2012/5/15

Y1 - 2012/5/15

N2 - In the present work, the dependence of microstructure and electrical properties on B-site non-stoichiometry (excess) for (Na 0.474K 0.474Li 0.052)(Nb 0.948Sb 0.052)O 3 - xTa 2O 5 (KNLNSTx) was symmetrically investigated. The phase structure was pure perovskite when x < 0.02 mol. While x > 0.02 mol, a secondary phase would be found in the samples. The results indicate that the densification and piezoelectricity were promoted as x < 0.01 mol. It is supposed that the low amount of Ta could induce A-site vacancy and favor the poling efficiency. KNLNSTx ceramics with x = 0.005 mol Ta 2O 5 have optimum electrical properties: d 33 = 253 pC/N, k p = 0.437, Q m = 43 and tanδ = 0.027.

AB - In the present work, the dependence of microstructure and electrical properties on B-site non-stoichiometry (excess) for (Na 0.474K 0.474Li 0.052)(Nb 0.948Sb 0.052)O 3 - xTa 2O 5 (KNLNSTx) was symmetrically investigated. The phase structure was pure perovskite when x < 0.02 mol. While x > 0.02 mol, a secondary phase would be found in the samples. The results indicate that the densification and piezoelectricity were promoted as x < 0.01 mol. It is supposed that the low amount of Ta could induce A-site vacancy and favor the poling efficiency. KNLNSTx ceramics with x = 0.005 mol Ta 2O 5 have optimum electrical properties: d 33 = 253 pC/N, k p = 0.437, Q m = 43 and tanδ = 0.027.

KW - Ferroelectrics

KW - Lead-free ceramics

KW - Microstructure

UR - https://www.scopus.com/pages/publications/84862831405

U2 - 10.1016/j.matlet.2012.02.021

DO - 10.1016/j.matlet.2012.02.021

M3 - Article

AN - SCOPUS:84862831405

SN - 0167-577X

VL - 75

SP - 146

EP - 148

JO - Materials Letters

JF - Materials Letters

ER -

Influence of B-site non-stoichiometry on structure and electrical properties of KNLNS lead-free piezoelectric ceramics

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this