Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor

Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor

Na<sub>0.5</sub>Bi<sub>0.48</sub>Sr<sub>0.02</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.97</sub> compound was synthesized by solid-state reaction. AC impedance and internal friction spectroscopy were employed to study the el...

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Main Authors: WANG Wei-guo, WANG Xin-fu, WANG Dan, HAO Gang-ling
Format: Article
Language:zho
Published: Journal of Materials Engineering 2019-08-01
Series:Cailiao gongcheng
Subjects:
oxide ionic conductor
grain conductivity
oxygen vacancy mobility
Online Access:http://jme.biam.ac.cn/CN/Y2019/V47/I8/28
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author WANG Wei-guo
WANG Xin-fu
WANG Dan
HAO Gang-ling
author_facet WANG Wei-guo
WANG Xin-fu
WANG Dan
HAO Gang-ling
author_sort WANG Wei-guo
collection DOAJ
description Na<sub>0.5</sub>Bi<sub>0.48</sub>Sr<sub>0.02</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.97</sub> compound was synthesized by solid-state reaction. AC impedance and internal friction spectroscopy were employed to study the electrical performance and oxgyen ion diffusion in the Sr,Mg-co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> compounds. The grain conductivity of Na<sub>0.5</sub>Bi<sub>0.48</sub>Sr<sub>0.02</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.97</sub> sample can reach 5.31&#215;10<sup>-4</sup> S/cm at 593 K, an order of magnitude higher than that of the Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> compound at the same temperature and exceeding the grain conductivity of Na<sub>0.5</sub>Bi<sub>0.5</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.98</sub> sample at 673K. An internal friction relaxation peak was observed. The relaxation parameters can be calculated, <i>E</i>=0.85eV and <i>τ</i><sub>0</sub>=7.4&#215;10<sup>-14</sup>s. Judging from the relaxation parameters and structural analysis, the Sr<sup>2+</sup> dopant can amplify the specific free volume. Compared with the Na<sub>0.5</sub>Bi<sub>0.5</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.98</sub> sample, the substantial increase of the grain conductivity for Na<sub>0.5</sub>Bi<sub>0.48</sub>Sr<sub>0.02</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.97</sub> sample may be derived from the larger specific free volume, higher mobile oxygen vacancy content and better oxygen vacancy mobility.
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spelling doaj.art-371aed7ed34144e484d4e2ecf345a97c2023-01-03T01:48:58ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43811001-43812019-08-01478283210.11868/j.issn.1001-4381.2018.001190201908001190Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductorWANG Wei-guo0WANG Xin-fu1WANG Dan2HAO Gang-ling3College of Physics and Electronic Information, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Physics and Electronic Information, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Physics and Electronic Information, Yan'an University, Yan'an 716000, Shaanxi, ChinaCollege of Physics and Electronic Information, Yan'an University, Yan'an 716000, Shaanxi, ChinaNa<sub>0.5</sub>Bi<sub>0.48</sub>Sr<sub>0.02</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.97</sub> compound was synthesized by solid-state reaction. AC impedance and internal friction spectroscopy were employed to study the electrical performance and oxgyen ion diffusion in the Sr,Mg-co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> compounds. The grain conductivity of Na<sub>0.5</sub>Bi<sub>0.48</sub>Sr<sub>0.02</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.97</sub> sample can reach 5.31&#215;10<sup>-4</sup> S/cm at 593 K, an order of magnitude higher than that of the Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> compound at the same temperature and exceeding the grain conductivity of Na<sub>0.5</sub>Bi<sub>0.5</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.98</sub> sample at 673K. An internal friction relaxation peak was observed. The relaxation parameters can be calculated, <i>E</i>=0.85eV and <i>τ</i><sub>0</sub>=7.4&#215;10<sup>-14</sup>s. Judging from the relaxation parameters and structural analysis, the Sr<sup>2+</sup> dopant can amplify the specific free volume. Compared with the Na<sub>0.5</sub>Bi<sub>0.5</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.98</sub> sample, the substantial increase of the grain conductivity for Na<sub>0.5</sub>Bi<sub>0.48</sub>Sr<sub>0.02</sub>Ti<sub>0.98</sub>Mg<sub>0.02</sub>O<sub>2.97</sub> sample may be derived from the larger specific free volume, higher mobile oxygen vacancy content and better oxygen vacancy mobility.http://jme.biam.ac.cn/CN/Y2019/V47/I8/28oxide ionic conductorgrain conductivityoxygen vacancy mobility
spellingShingle WANG Wei-guo
WANG Xin-fu
WANG Dan
HAO Gang-ling
Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor
Cailiao gongcheng
oxide ionic conductor
grain conductivity
oxygen vacancy mobility
title Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor
title_full Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor
title_fullStr Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor
title_full_unstemmed Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor
title_short Investigation on electrical performance of Sr, Mg, co-doped Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> oxide ion conductor
title_sort investigation on electrical performance of sr mg co doped na sub 0 5 sub bi sub 0 5 sub tio sub 3 sub oxide ion conductor
topic oxide ionic conductor
grain conductivity
oxygen vacancy mobility
url http://jme.biam.ac.cn/CN/Y2019/V47/I8/28
work_keys_str_mv AT wangweiguo investigationonelectricalperformanceofsrmgcodopednasub05subbisub05subtiosub3suboxideionconductor
AT wangxinfu investigationonelectricalperformanceofsrmgcodopednasub05subbisub05subtiosub3suboxideionconductor
AT wangdan investigationonelectricalperformanceofsrmgcodopednasub05subbisub05subtiosub3suboxideionconductor
AT haogangling investigationonelectricalperformanceofsrmgcodopednasub05subbisub05subtiosub3suboxideionconductor

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