Oxide ion conductivity, phase transitions, and phase separation in fluorite-based Bi38- xMo7+ xO78+1.5 x

Xiaojun Kuang; Yuandi Li; Chris D. Ling; Ray L. Withers; Ivana Radosavljevic Evans

doi:10.1021/cm101324n

Oxide ion conductivity, phase transitions, and phase separation in fluorite-based Bi_{38- x}Mo_{7+ x}O_{78+1.5 x}

Xiaojun Kuang, Yuandi Li, Chris D. Ling, Ray L. Withers, Ivana Radosavljevic Evans

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

25 Citations (Scopus)

Abstract

We present, for the first time, the ionic conductivity properties of two different, but closely related, bismuth molybdates: Bi₃₈Mo ₇O₇₈ and Bi_37.5Mo_7.5O _78.75. Both are good oxide ion conductors, with the latter being comparable to yttria-stabilized zirconia. We show that the structure of Bi ₃₈Mo₇O₇₈ is more complex than previously reported, and that this compound is a 5×3×6 fluorite superstructure with slight monoclinic distortion. In addition to being a good oxide ion conductor, the material is noncentrosymmetric-polar and second harmonic generation (SHG) active. The second phase, orthorhombic Bi_37.5Mo _7.5O_78.75, reported for the first time, is an excellent oxide ion conductor. The materials have been characterized by impedance spectroscopy, variable-temperature synchrotron, neutron and laboratory powder X-ray diffraction, electron diffraction, and SHG measurements.

Original language	English
Pages (from-to)	4484-4494
Number of pages	11
Journal	Chemistry of Materials
Volume	22
Issue number	15
DOIs	https://doi.org/10.1021/cm101324n
Publication status	Published - 10 Aug 2010

Access to Document

10.1021/cm101324n

Cite this

@article{66fbd2a1f79e47baa419f6eab50c494e,

title = "Oxide ion conductivity, phase transitions, and phase separation in fluorite-based Bi38- xMo7+ xO78+1.5 x",

abstract = "We present, for the first time, the ionic conductivity properties of two different, but closely related, bismuth molybdates: Bi38Mo 7O78 and Bi37.5Mo7.5O 78.75. Both are good oxide ion conductors, with the latter being comparable to yttria-stabilized zirconia. We show that the structure of Bi 38Mo7O78 is more complex than previously reported, and that this compound is a 5×3×6 fluorite superstructure with slight monoclinic distortion. In addition to being a good oxide ion conductor, the material is noncentrosymmetric-polar and second harmonic generation (SHG) active. The second phase, orthorhombic Bi37.5Mo 7.5O78.75, reported for the first time, is an excellent oxide ion conductor. The materials have been characterized by impedance spectroscopy, variable-temperature synchrotron, neutron and laboratory powder X-ray diffraction, electron diffraction, and SHG measurements.",

author = "Xiaojun Kuang and Yuandi Li and Ling, {Chris D.} and Withers, {Ray L.} and Evans, {Ivana Radosavljevic}",

year = "2010",

month = aug,

day = "10",

doi = "10.1021/cm101324n",

language = "English",

volume = "22",

pages = "4484--4494",

journal = "Chemistry of Materials",

issn = "0897-4756",

publisher = "American Chemical Society",

number = "15",

}

TY - JOUR

T1 - Oxide ion conductivity, phase transitions, and phase separation in fluorite-based Bi38- xMo7+ xO78+1.5 x

AU - Kuang, Xiaojun

AU - Li, Yuandi

AU - Ling, Chris D.

AU - Withers, Ray L.

AU - Evans, Ivana Radosavljevic

PY - 2010/8/10

Y1 - 2010/8/10

N2 - We present, for the first time, the ionic conductivity properties of two different, but closely related, bismuth molybdates: Bi38Mo 7O78 and Bi37.5Mo7.5O 78.75. Both are good oxide ion conductors, with the latter being comparable to yttria-stabilized zirconia. We show that the structure of Bi 38Mo7O78 is more complex than previously reported, and that this compound is a 5×3×6 fluorite superstructure with slight monoclinic distortion. In addition to being a good oxide ion conductor, the material is noncentrosymmetric-polar and second harmonic generation (SHG) active. The second phase, orthorhombic Bi37.5Mo 7.5O78.75, reported for the first time, is an excellent oxide ion conductor. The materials have been characterized by impedance spectroscopy, variable-temperature synchrotron, neutron and laboratory powder X-ray diffraction, electron diffraction, and SHG measurements.

AB - We present, for the first time, the ionic conductivity properties of two different, but closely related, bismuth molybdates: Bi38Mo 7O78 and Bi37.5Mo7.5O 78.75. Both are good oxide ion conductors, with the latter being comparable to yttria-stabilized zirconia. We show that the structure of Bi 38Mo7O78 is more complex than previously reported, and that this compound is a 5×3×6 fluorite superstructure with slight monoclinic distortion. In addition to being a good oxide ion conductor, the material is noncentrosymmetric-polar and second harmonic generation (SHG) active. The second phase, orthorhombic Bi37.5Mo 7.5O78.75, reported for the first time, is an excellent oxide ion conductor. The materials have been characterized by impedance spectroscopy, variable-temperature synchrotron, neutron and laboratory powder X-ray diffraction, electron diffraction, and SHG measurements.

UR - http://www.scopus.com/inward/record.url?scp=77955252443&partnerID=8YFLogxK

U2 - 10.1021/cm101324n

DO - 10.1021/cm101324n

M3 - Article

SN - 0897-4756

VL - 22

SP - 4484

EP - 4494

JO - Chemistry of Materials

JF - Chemistry of Materials

IS - 15

ER -

Oxide ion conductivity, phase transitions, and phase separation in fluorite-based Bi_{38- x}Mo_{7+ x}O_{78+1.5 x}

Abstract

Access to Document

Other files and links

Fingerprint

Cite this