Defect dipoles and electrical properties of magnesium B-site substituted sodium potassium niobates

Tangyuan Li; Huiqing Fan; Changbai Long; Guangzhi Dong; Sheji Sun

doi:10.1016/j.jallcom.2014.04.024

Defect dipoles and electrical properties of magnesium B-site substituted sodium potassium niobates

Tangyuan Li
, Huiqing Fan
, Changbai Long
, Guangzhi Dong
, Sheji Sun

School of Materials Sience and Engineering

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

70 Scopus citations

Abstract

K_0.5Na_0.5Nb_1-xMg _xO_3-3x/2 ceramics with the Mg ²⁺ acceptor substitution for the B-site Nb⁵⁺ were prepared by using the solid-state reaction process. K_0.5Na _0.5Nb_0.99Mg_0.01O_2.985 (x = 0.01) had the most pronounced double-loop-like characteristic due to the restoring force provided by the defect polarization (P_D) associated with non-centric distributing the defect dipoles (^{MgNb′-VO)′}, and the Rietveld refinement confirmed that it crystallized in the orthorhombic space group Bmm2 [a = 5.64306(7) Å, b = 3.94541(4) Å and c = 5.67406(7) Å] at room temperature. Furthermore, the P-E loops of K _0.5Na_0.5Nb_0.99Mg_0.01O _2.985 dependence on annealing, aging, measuring frequency and measuring temperature were investigated, and the reinforcement in the double-loop-like characteristic was caused by a decrease in oxygen concentration, an increase in aging temperature, an increase in measuring frequency and a decrease in measuring temperature.

Original language	English
Pages (from-to)	60-67
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	609
DOIs	https://doi.org/10.1016/j.jallcom.2014.04.024
State	Published - 5 Oct 2014

Keywords

Defect dipoles
Defect polarization
Double-loop-like characteristic
Mg acceptor-substituted sodium potassium niobates
Oxygen vacancy concentration

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10.1016/j.jallcom.2014.04.024

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@article{53af3d1d851b498f8905a5142b163383,

title = "Defect dipoles and electrical properties of magnesium B-site substituted sodium potassium niobates",

abstract = "K0.5Na0.5Nb1-xMg xO3-3x/2 ceramics with the Mg 2+ acceptor substitution for the B-site Nb5+ were prepared by using the solid-state reaction process. K0.5Na 0.5Nb0.99Mg0.01O2.985 (x = 0.01) had the most pronounced double-loop-like characteristic due to the restoring force provided by the defect polarization (PD) associated with non-centric distributing the defect dipoles (MgNb′-VO)′, and the Rietveld refinement confirmed that it crystallized in the orthorhombic space group Bmm2 [a = 5.64306(7) {\AA}, b = 3.94541(4) {\AA} and c = 5.67406(7) {\AA}] at room temperature. Furthermore, the P-E loops of K 0.5Na0.5Nb0.99Mg0.01O 2.985 dependence on annealing, aging, measuring frequency and measuring temperature were investigated, and the reinforcement in the double-loop-like characteristic was caused by a decrease in oxygen concentration, an increase in aging temperature, an increase in measuring frequency and a decrease in measuring temperature.",

keywords = "Defect dipoles, Defect polarization, Double-loop-like characteristic, Mg acceptor-substituted sodium potassium niobates, Oxygen vacancy concentration",

author = "Tangyuan Li and Huiqing Fan and Changbai Long and Guangzhi Dong and Sheji Sun",

year = "2014",

month = oct,

day = "5",

doi = "10.1016/j.jallcom.2014.04.024",

language = "英语",

volume = "609",

pages = "60--67",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Defect dipoles and electrical properties of magnesium B-site substituted sodium potassium niobates

AU - Li, Tangyuan

AU - Fan, Huiqing

AU - Long, Changbai

AU - Dong, Guangzhi

AU - Sun, Sheji

PY - 2014/10/5

Y1 - 2014/10/5

N2 - K0.5Na0.5Nb1-xMg xO3-3x/2 ceramics with the Mg 2+ acceptor substitution for the B-site Nb5+ were prepared by using the solid-state reaction process. K0.5Na 0.5Nb0.99Mg0.01O2.985 (x = 0.01) had the most pronounced double-loop-like characteristic due to the restoring force provided by the defect polarization (PD) associated with non-centric distributing the defect dipoles (MgNb′-VO)′, and the Rietveld refinement confirmed that it crystallized in the orthorhombic space group Bmm2 [a = 5.64306(7) Å, b = 3.94541(4) Å and c = 5.67406(7) Å] at room temperature. Furthermore, the P-E loops of K 0.5Na0.5Nb0.99Mg0.01O 2.985 dependence on annealing, aging, measuring frequency and measuring temperature were investigated, and the reinforcement in the double-loop-like characteristic was caused by a decrease in oxygen concentration, an increase in aging temperature, an increase in measuring frequency and a decrease in measuring temperature.

AB - K0.5Na0.5Nb1-xMg xO3-3x/2 ceramics with the Mg 2+ acceptor substitution for the B-site Nb5+ were prepared by using the solid-state reaction process. K0.5Na 0.5Nb0.99Mg0.01O2.985 (x = 0.01) had the most pronounced double-loop-like characteristic due to the restoring force provided by the defect polarization (PD) associated with non-centric distributing the defect dipoles (MgNb′-VO)′, and the Rietveld refinement confirmed that it crystallized in the orthorhombic space group Bmm2 [a = 5.64306(7) Å, b = 3.94541(4) Å and c = 5.67406(7) Å] at room temperature. Furthermore, the P-E loops of K 0.5Na0.5Nb0.99Mg0.01O 2.985 dependence on annealing, aging, measuring frequency and measuring temperature were investigated, and the reinforcement in the double-loop-like characteristic was caused by a decrease in oxygen concentration, an increase in aging temperature, an increase in measuring frequency and a decrease in measuring temperature.

KW - Defect dipoles

KW - Defect polarization

KW - Double-loop-like characteristic

KW - Mg acceptor-substituted sodium potassium niobates

KW - Oxygen vacancy concentration

UR - https://www.scopus.com/pages/publications/84901056686

U2 - 10.1016/j.jallcom.2014.04.024

DO - 10.1016/j.jallcom.2014.04.024

M3 - 文章

AN - SCOPUS:84901056686

SN - 0925-8388

VL - 609

SP - 60

EP - 67

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Defect dipoles and electrical properties of magnesium B-site substituted sodium potassium niobates

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Keywords

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