Study on the electrical conductivity and relaxation behavior of K-doped Na0.5Bi0.5TiO3 ceramics

Wang, W. G.

doi:10.1007/s10854-017-8338-8

Cited by 16 publications

(15 citation statements)

References 27 publications

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“…The curve-fitting results are presented in the table 1. The capacitance at high frequency and low frequency is about 10 -10 F and 10 -7 F, which is the typical grain response and electrode response of oxygen ion conductor [12,13,19].…”

Section: Phase Structurementioning

confidence: 87%

“…Figure 1 shows the XRD patterns of Na0.5Bi0.5TiO3 and Na0.52Bi0.47Ti1-xGaxO3-δ (x=0, 0.01, 0.015, 0.02) samples. There were no extra peaks of impurity phase in the compositions of Na + excess and Ga 3+ doped NBT samples through comparing the diffraction pattern with Na0.5Bi0.5TiO3 compound , which suggested that excess Na + and Ga 3+ ions are dissolved into the perovskite lattice of NBT-based compounds [13].…”

Section: Phase Structurementioning

confidence: 91%

“…The Na0.52Bi0.47Ti1-xGaxO3-δ compounds (x=0, 0.01, 0.015, 0.02) were elaborated by conventional solid phase reaction method using high purity Na2CO3, Bi2O3, TiO2 and Ga2O3 [13]. In order to eliminate absorbed water and CO2, the raw materials mentioned above were dried at 573 K for around 12 h. The detailed preparation procedure can be seen in Ref.…”

Section: Methodsmentioning

confidence: 99%

“…For the other way of introducing oxygen vacancies, it mainly focuses on the acceptor doping of A or B sites. A site acceptor doping are mainly on the trivalent Bi 3+ ions replaced by the monovalent ions (Li + , Na + , K + ) or divalent ions (Ca 2+ , Sr 2+ , Ba 2+ ) [1,7,13]. Yang et al Reported that Sr 2+ doped Bi-deficent NBT-based compounds (Na0.5Bi0.47Sr0.02TiO2.975) is a profitable means to improve the electrical properties for oxygen ion conductors [14].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Ga doping for non-stoichiometric sodium bismuth titanate ceramics

wang

et al. 2021

J Mater Sci: Mater Electron

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The electrical performance of Ga 3+ doping Na0.5Bi0.5TiO3-based oxygen ion conductor was studied. The Na0.52Bi0.47Ti1-xGaxO3-δ (x=0, 0.01, 0.015, 0.02) samples were fabricated by the means of traditional solid-state reaction. The results of AC impedance measurement show that the bulk conductivity of Na0.52Bi0.47Ti1-xGaxO3-δ samples decrease monotonously with the increase of Ga 3+ doping. At 673 K, the bulk conductivity of the Na0.52Bi0.47Ti0.98Ga0.02O3-δ sample is 7.19×10 -4 S/cm, which is lower than that of Na0.52Bi0.47TiO3-δ sample under the identical test temperature. The highest total conductivity emerges in the Na0.52Bi0.47Ti0.99Ga0.01O3-δ sample with 1.387×10 -4 S/cm at 623 K for the Ga 3+ doping content of 1 mol%, which demonstrate that a slight of Ga 3+ doping supports the enhancement of the total conductivity. A relaxation peak was observed in the Na0.52Bi0.47Ti1-xGaxO3-δ compounds. As the Ga 3+ ions were introduced into the Na0.52Bi0.47TiO3-δ compound, there is an increasing trend of the relaxation activation energy educed by the internal friction test. In addition, the oxygen relaxtion height of Na0.52Bi0.47Ti1-xGaxO3-δ samples decreases along with the introduction of the Ga 3+ doping, suggesting that the introduction of the Ga 3+ leads to the decrease of mobile oxygen vacancy .

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Section: Phase Structurementioning

confidence: 87%

Section: Phase Structurementioning

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of Ga doping for non-stoichiometric sodium bismuth titanate ceramics

wang

et al. 2021

J Mater Sci: Mater Electron

Self Cite

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“…In previously reported results, oxide ionic conductivity of NBT-based materials was improved by the monovalent Na + (Ca 2+ or K + )-doping on the trivalent Bi 3+ -site to obtain a higher oxygen vacancy concentration in NBT materials [13][14][15]. The objective of the present study is to alter the tetravalent Ti 4+ by divalent Mg 2+ to determine the effect on the electrical properties of Na 0.5 Bi 0.5 Ti 1−x Mg x O 3−x compounds .…”

Section: Introductionmentioning

confidence: 90%

Study on electrical conductivity and oxygen migration of the oxide-ion conductors $$\hbox {Na}_{0.5}\hbox {Bi}_{0.5}\hbox {Ti}_{1-x}\hbox {Mg}_{{x}}\hbox {O}_{3-x}$$ Na 0.5 Bi

Wang

Liu

et al. 2019

Bull Mater Sci

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Electrical performance and oxygen relaxation behaviour in Na 0.5 Bi 0.5 Ti 1−x Mg x O 3−x compounds were investigated. The oxide ion conductivity of Na 0.5 Bi 0.5 Ti 1−x Mg x O 3−x compounds increased first and then decreased with increasing Mg-doped content. The highest oxide ion conductivity of 4.7 × 10 −3 S cm −1 at 773 K was observed for the Na 0.5 Bi 0.5 Ti 0.96 Mg 0.04 O 2.96 compound. A typical relaxation peak in the Na 0.5 Bi 0.5 Ti 1−x Mg x O 3−x samples was observed. The activation energy and pre-exponential factors were determined as (1.0 eV, 4.7 × 10 −16 s) and (0.94−1.0 eV, 6.8 × 10 −14 −3.1 × 10 −13 s) from internal friction and dielectric relaxation measurement, respectively. The lower oxide ion conductivity in Na 0.5 Bi 0.5 Ti 1−x Mg x O 3−x (x = 0.06, 0.08, 0.10) compounds may arise from the lower vacancy mobility. Judging from the electrical performance and relaxation parameters, although lower-level Mgdoping can improve oxide ionic conductor, oxygen vacancy mobility in Na 0.5 Bi 0.5 Ti 1−x Mg x O 3−x compounds cannot be improved with increasing Mg-doping content. These results will be meaningful to ameliorate the electrical properties of Na 0.5 Bi 0.5 Ti 1−x Mg x O 3−x compounds and understand the relationship between the electrical properties and structure.

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The effect of doping on oxygen conductivity performance of Na0.5Bi0.5TiO3 compounds

Wang

Hao

2019

J Mater Sci: Mater Electron

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Study on the electrical conductivity and relaxation behavior of K-doped Na0.5Bi0.5TiO3 ceramics

Cited by 16 publications

References 27 publications

Investigation of Ga doping for non-stoichiometric sodium bismuth titanate ceramics

Investigation of Ga doping for non-stoichiometric sodium bismuth titanate ceramics

Study on electrical conductivity and oxygen migration of the oxide-ion conductors $$\hbox {Na}_{0.5}\hbox {Bi}_{0.5}\hbox {Ti}_{1-x}\hbox {Mg}_{{x}}\hbox {O}_{3-x}$$ Na 0.5 Bi

The effect of doping on oxygen conductivity performance of Na0.5Bi0.5TiO3 compounds

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