Mechanical and impedance spectroscopy studies on the fast oxide ion conductor Na0.54Bi0.5Ti0.94Mg0.06O2.94

Wang, W. G.; Li, X. Y.; Liu, T.

doi:10.1007/s10854-017-7406-4

Cited by 5 publications

(1 citation statement)

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“…The detailed synthesis process can be found in ref. [17]: the raw material powders were ball-milled using agate balls for 8 h initially and heat-treated at 1073 K for 12 h. The powders were ball-milled, dried and then pressed into the bar (pellet) sample, which was annealed at 1323 K for 12 h to obtain the measuring samples [17]. The size of the pellet samples used for the electrical performance measurement has the diameter of about 11.4 mm and the thickness of about 2.1 mm.…”

Section: Methodsmentioning

confidence: 99%

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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Section: Methodsmentioning

confidence: 99%