Dielectric properties and microstructure of Sr0.8(K,Na)0.2Bi2Nb2O9 ferroelectric ceramics

Pinyang Fang; Huiqing Fan; Laijun Liu; Jin Chen; Jin Li

doi:10.1016/j.jallcom.2008.10.148

Dielectric properties and microstructure of Sr_0.8(K,Na)_0.2Bi₂Nb₂O₉ ferroelectric ceramics

Pinyang Fang, Huiqing Fan, Laijun Liu, Jin Chen, Jin Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

9 Scopus citations

Abstract

The influence of the microstructure on dielectric properties of Sr_0.8(K,Na)_0.2Bi₂Nb₂O₉ (SKNBNO) prepared by the solid-state route is reported. The formation of Bi-layer structure was obviously restrained owing to the K and Na ions substituting Sr ions by the X-ray diffraction analysis (XRD) and scanning electron micrograph (SEM). At the same time, some slight secondary phase of bismuth oxide was detected but the structure was not changed. The dielectric constant was restrained by K and Na ions substituting Sr ions, which is mainly attributed to the slight change of lattice constants resulting in a decreased "rattling space" for the cations inside the distorted Nb(V)O₆ oxygen octahedron of the perovskite block. A clear enhancement in the stability of frequency and temperature was noticed for SKNBNO sample compared to Sr₂Bi₂Nb₂O₉ (SBN) samples.

Original language	English
Pages (from-to)	828-831
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	477
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2008.10.148
State	Published - 27 May 2009

Keywords

Aurivillius family
Dielectric properties
Ferroelectrics
SBN

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10.1016/j.jallcom.2008.10.148

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title = "Dielectric properties and microstructure of Sr0.8(K,Na)0.2Bi2Nb2O9 ferroelectric ceramics",

abstract = "The influence of the microstructure on dielectric properties of Sr0.8(K,Na)0.2Bi2Nb2O9 (SKNBNO) prepared by the solid-state route is reported. The formation of Bi-layer structure was obviously restrained owing to the K and Na ions substituting Sr ions by the X-ray diffraction analysis (XRD) and scanning electron micrograph (SEM). At the same time, some slight secondary phase of bismuth oxide was detected but the structure was not changed. The dielectric constant was restrained by K and Na ions substituting Sr ions, which is mainly attributed to the slight change of lattice constants resulting in a decreased {"}rattling space{"} for the cations inside the distorted Nb(V)O6 oxygen octahedron of the perovskite block. A clear enhancement in the stability of frequency and temperature was noticed for SKNBNO sample compared to Sr2Bi2Nb2O9 (SBN) samples.",

keywords = "Aurivillius family, Dielectric properties, Ferroelectrics, SBN",

author = "Pinyang Fang and Huiqing Fan and Laijun Liu and Jin Chen and Jin Li",

year = "2009",

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doi = "10.1016/j.jallcom.2008.10.148",

language = "英语",

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TY - JOUR

T1 - Dielectric properties and microstructure of Sr0.8(K,Na)0.2Bi2Nb2O9 ferroelectric ceramics

AU - Fang, Pinyang

AU - Fan, Huiqing

AU - Liu, Laijun

AU - Chen, Jin

AU - Li, Jin

PY - 2009/5/27

Y1 - 2009/5/27

N2 - The influence of the microstructure on dielectric properties of Sr0.8(K,Na)0.2Bi2Nb2O9 (SKNBNO) prepared by the solid-state route is reported. The formation of Bi-layer structure was obviously restrained owing to the K and Na ions substituting Sr ions by the X-ray diffraction analysis (XRD) and scanning electron micrograph (SEM). At the same time, some slight secondary phase of bismuth oxide was detected but the structure was not changed. The dielectric constant was restrained by K and Na ions substituting Sr ions, which is mainly attributed to the slight change of lattice constants resulting in a decreased "rattling space" for the cations inside the distorted Nb(V)O6 oxygen octahedron of the perovskite block. A clear enhancement in the stability of frequency and temperature was noticed for SKNBNO sample compared to Sr2Bi2Nb2O9 (SBN) samples.

AB - The influence of the microstructure on dielectric properties of Sr0.8(K,Na)0.2Bi2Nb2O9 (SKNBNO) prepared by the solid-state route is reported. The formation of Bi-layer structure was obviously restrained owing to the K and Na ions substituting Sr ions by the X-ray diffraction analysis (XRD) and scanning electron micrograph (SEM). At the same time, some slight secondary phase of bismuth oxide was detected but the structure was not changed. The dielectric constant was restrained by K and Na ions substituting Sr ions, which is mainly attributed to the slight change of lattice constants resulting in a decreased "rattling space" for the cations inside the distorted Nb(V)O6 oxygen octahedron of the perovskite block. A clear enhancement in the stability of frequency and temperature was noticed for SKNBNO sample compared to Sr2Bi2Nb2O9 (SBN) samples.

KW - Aurivillius family

KW - Dielectric properties

KW - Ferroelectrics

KW - SBN

UR - http://www.scopus.com/inward/record.url?scp=67349165018&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2008.10.148

DO - 10.1016/j.jallcom.2008.10.148

M3 - 文章

AN - SCOPUS:67349165018

SN - 0925-8388

VL - 477

SP - 828

EP - 831

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

Dielectric properties and microstructure of Sr_0.8(K,Na)_0.2Bi₂Nb₂O₉ ferroelectric ceramics

Abstract

Keywords

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