Effect of lanthanum and tungsten co-substitution on the structure and properties of new Aurivillius oxides Na0.5La0.5Bi 2Nb2-xWxO9

Changbai Long; Huiqing Fan; Mengmeng Li; Qiang Li

doi:10.1039/c2ce25718a

Effect of lanthanum and tungsten co-substitution on the structure and properties of new Aurivillius oxides Na_0.5La_0.5Bi ₂Nb_2-xW_xO₉

Changbai Long, Huiqing Fan, Mengmeng Li, Qiang Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

59 Scopus citations

Abstract

New Aurivillius ferroelectrics Na_0.5La_0.5Bi ₂Nb_2-xW_xO₉ (NLBN-W, x = 0, 0.01, 0.02, 0.03, and 0.05) by lanthanum (La³⁺) and tungsten (W ⁶⁺) co-substitution were prepared by using a solid-state reaction process. The crystal structure of Na_0.5La_0.5Bi ₂Nb_1.98W_0.02O₉ (NLBN-W-0.02) was refined by the Rietveld method with powder X-ray diffraction at room temperature and it was confirmed to be a two-layer Aurivillius oxide with an orthorhombic space group A2₁am (a = 5.48754(8) Å, b = 5.47967(9) Å and c = 24.8523(4) Å). The ferroelectric to paraelectric phase transition temperature (T_c) of NLBN-W-0.02 is around 501 °C, with prominent relaxation behavior. The NLBN-W-0.02 ceramics have a high piezoelectric coefficient (d₃₃ = 31 pC N^-1) and large remnant polarization (P_r = 15.1 μC cm^-2). The decrease in P_r for the NLBN-W-0.02 ceramics after 10⁷ switching cycles at 40 and 120 °C is only 2 and 9%, respectively.

Original language	English
Pages (from-to)	7201-7208
Number of pages	8
Journal	CrystEngComm
Volume	14
Issue number	21
DOIs	https://doi.org/10.1039/c2ce25718a
State	Published - 7 Nov 2012

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@article{45a278b6d8974c978481e69846bad723,

title = "Effect of lanthanum and tungsten co-substitution on the structure and properties of new Aurivillius oxides Na0.5La0.5Bi 2Nb2-xWxO9",

abstract = "New Aurivillius ferroelectrics Na0.5La0.5Bi 2Nb2-xWxO9 (NLBN-W, x = 0, 0.01, 0.02, 0.03, and 0.05) by lanthanum (La3+) and tungsten (W 6+) co-substitution were prepared by using a solid-state reaction process. The crystal structure of Na0.5La0.5Bi 2Nb1.98W0.02O9 (NLBN-W-0.02) was refined by the Rietveld method with powder X-ray diffraction at room temperature and it was confirmed to be a two-layer Aurivillius oxide with an orthorhombic space group A21am (a = 5.48754(8) {\AA}, b = 5.47967(9) {\AA} and c = 24.8523(4) {\AA}). The ferroelectric to paraelectric phase transition temperature (Tc) of NLBN-W-0.02 is around 501 °C, with prominent relaxation behavior. The NLBN-W-0.02 ceramics have a high piezoelectric coefficient (d33 = 31 pC N-1) and large remnant polarization (Pr = 15.1 μC cm-2). The decrease in Pr for the NLBN-W-0.02 ceramics after 107 switching cycles at 40 and 120 °C is only 2 and 9\%, respectively.",

author = "Changbai Long and Huiqing Fan and Mengmeng Li and Qiang Li",

year = "2012",

month = nov,

day = "7",

doi = "10.1039/c2ce25718a",

language = "英语",

volume = "14",

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journal = "CrystEngComm",

issn = "1466-8033",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Effect of lanthanum and tungsten co-substitution on the structure and properties of new Aurivillius oxides Na0.5La0.5Bi 2Nb2-xWxO9

AU - Long, Changbai

AU - Fan, Huiqing

AU - Li, Mengmeng

AU - Li, Qiang

PY - 2012/11/7

Y1 - 2012/11/7

N2 - New Aurivillius ferroelectrics Na0.5La0.5Bi 2Nb2-xWxO9 (NLBN-W, x = 0, 0.01, 0.02, 0.03, and 0.05) by lanthanum (La3+) and tungsten (W 6+) co-substitution were prepared by using a solid-state reaction process. The crystal structure of Na0.5La0.5Bi 2Nb1.98W0.02O9 (NLBN-W-0.02) was refined by the Rietveld method with powder X-ray diffraction at room temperature and it was confirmed to be a two-layer Aurivillius oxide with an orthorhombic space group A21am (a = 5.48754(8) Å, b = 5.47967(9) Å and c = 24.8523(4) Å). The ferroelectric to paraelectric phase transition temperature (Tc) of NLBN-W-0.02 is around 501 °C, with prominent relaxation behavior. The NLBN-W-0.02 ceramics have a high piezoelectric coefficient (d33 = 31 pC N-1) and large remnant polarization (Pr = 15.1 μC cm-2). The decrease in Pr for the NLBN-W-0.02 ceramics after 107 switching cycles at 40 and 120 °C is only 2 and 9%, respectively.

AB - New Aurivillius ferroelectrics Na0.5La0.5Bi 2Nb2-xWxO9 (NLBN-W, x = 0, 0.01, 0.02, 0.03, and 0.05) by lanthanum (La3+) and tungsten (W 6+) co-substitution were prepared by using a solid-state reaction process. The crystal structure of Na0.5La0.5Bi 2Nb1.98W0.02O9 (NLBN-W-0.02) was refined by the Rietveld method with powder X-ray diffraction at room temperature and it was confirmed to be a two-layer Aurivillius oxide with an orthorhombic space group A21am (a = 5.48754(8) Å, b = 5.47967(9) Å and c = 24.8523(4) Å). The ferroelectric to paraelectric phase transition temperature (Tc) of NLBN-W-0.02 is around 501 °C, with prominent relaxation behavior. The NLBN-W-0.02 ceramics have a high piezoelectric coefficient (d33 = 31 pC N-1) and large remnant polarization (Pr = 15.1 μC cm-2). The decrease in Pr for the NLBN-W-0.02 ceramics after 107 switching cycles at 40 and 120 °C is only 2 and 9%, respectively.

UR - https://www.scopus.com/pages/publications/84867292435

U2 - 10.1039/c2ce25718a

DO - 10.1039/c2ce25718a

M3 - 文章

AN - SCOPUS:84867292435

SN - 1466-8033

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JO - CrystEngComm

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IS - 21

ER -

Effect of lanthanum and tungsten co-substitution on the structure and properties of new Aurivillius oxides Na_0.5La_0.5Bi ₂Nb_2-xW_xO₉

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