Effect of high bismuth deficiency on structure and oxide ion conductivity of a Bi0.55MoO4 single crystal

CrystEngComm ◽  
2015 ◽  
Vol 17 (45) ◽  
pp. 8746-8751
Author(s):  
Yang Zhang ◽  
Hengjiang Cong ◽  
Nianjing Ji ◽  
Jian Liu ◽  
Xiulan Duan ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Single Crystal ◽  
Ion Conductivity ◽  
Oxide Ion Conductivity ◽  
Bismuth Molybdates ◽  
First Time ◽  
Oxide Ion

We report, for the first time, the ionic conductivity properties of two polymorphic structures of bismuth molybdates: Bi0.55MoO4 and Bi2(MoO4)3.

scholarly journals The relationship between oxide-ion conductivity and cation vacancy order in the hybrid hexagonal perovskite Ba3VWO8.5

2020 ◽  
Vol 8 (32) ◽  
pp. 16506-16514 ◽  
Author(s):  
Asma Gilane ◽  
Sacha Fop ◽  
Falak Sher ◽  
Ronald I. Smith ◽  
Abbie C. Mclaughlin
Keyword(s):  
Ionic Conductivity ◽  
Long Range ◽  
Cation Vacancy ◽  
Ion Conductivity ◽  
Cation Ordering ◽  
Oxygen Diffusivity ◽  
Oxide Ion Conductivity ◽  
The Relationship ◽  
Oxide Ion

Cation ordering in Ba3VWO8.5 disrupts long-range oxygen diffusivity parallel to the c-axis resulting in reduced ionic conductivity.

Preparation of Oxygen Ion Conducting Doped Lanthanum Gallate Thin Films on Amorphous and Single Crystal Substrates by Pulsed Laser Deposition

2003 ◽  
Vol 796 ◽  
Author(s):  
Fumiaki Mitsugi ◽  
Seiji Kanazawa ◽  
Toshikazu Ohkubo ◽  
Yukiharu Nomoto ◽  
Yusaku Takita ◽  
...  
Keyword(s):  
Thin Films ◽  
Single Crystal ◽  
Pulsed Laser Deposition ◽  
Complex Impedance ◽  
Pulsed Laser ◽  
Ion Conductivity ◽  
Laser Deposition ◽  
Lanthanum Gallate ◽  
Oxide Ion Conductivity ◽  
Oxide Ion

ABSTRACTAn La1-xSrxGa1-y-zMgyCozO3-(x+y+z)/2 (LSGMCO) has attracted much attention because it can be useable as an electrolyte of a solid oxide fuel cell due to its high oxide ion conductivity. We prepared LSGMCO thin films on silica glass and LaAlO3 single crystal substrates by pulsed laser deposition and evaluated their properties. LSGMCO thin films deposited at 800°C were poly-crystal and the deposition pressure affected their surface morphologies. In the case of the LaAlO3 single crystal substrate, a c-axis oriented LSGMCO thin film was obtained. DC conductivity and complex impedance of LSGMCO thin films were measured in vacuum atmosphere to investigate the effect of the crystal orientation on the oxide ion conductivity. It was revealed that resistance at a grain boundary of films is more dominant compare with the grain interior.

Single crystal growth and oxide ion conductivity of apatite-type rare-earth silicates

2004 ◽  
Vol 174 (1-4) ◽  
pp. 73-80 ◽  
Author(s):  
M HIGUCHI ◽  
Y MASUBUCHI ◽  
S NAKAYAMA ◽  
S KIKKAWA ◽  
K KODAIRA
Keyword(s):  
Rare Earth ◽  
Crystal Growth ◽  
Single Crystal ◽  
Single Crystal Growth ◽  
Ion Conductivity ◽  
Oxide Ion Conductivity ◽  
Oxide Ion ◽  
Apatite Type

Structural origin of the enhanced ionic conductivity upon Nb doping in Sr11Mo4O23 defective double perovskite

2017 ◽  
Vol 46 (12) ◽  
pp. 3934-3942 ◽  
Author(s):  
C. D. Miranda ◽  
C. A. López ◽  
J. C. Pedregosa ◽  
J. A. Alonso
Keyword(s):  
Ionic Conductivity ◽  
Double Perovskite ◽  
Ion Conductivity ◽  
Oxide Ion Conductivity ◽  
Nb Doping ◽  
Oxide Ion

We report a substantial enhancement of the oxide-ion conductivity in Sr11Mo4O23 achieved by Nb doping the Mo sites.

High oxide-ion conductivity in Si-deficient La9.565(Si5.826□0.174)O26 apatite without interstitial oxygens due to the overbonded channel oxygens

2018 ◽  
Vol 6 (23) ◽  
pp. 10835-10846 ◽  
Author(s):  
Kotaro Fujii ◽  
Masatomo Yashima ◽  
Keisuke Hibino ◽  
Masahiro Shiraiwa ◽  
Koichiro Fukuda ◽  
...  
Keyword(s):  
Single Crystal ◽  
Ion Conductivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Ion Conductivity ◽  
Ion Conductivities ◽  
Lanthanum Silicates ◽  
Oxide Ion ◽  
Apatite Type

Overbonding of the channel oxygens in the apatite-type lanthanum silicates was found to be a key for the high oxide-ion conductivities by the present single-crystal neutron and X-ray diffraction studies.

Re-investigation of the structure and crystal chemistry of the Bi2O3–W2O6 `type (Ib)' solid solution using single-crystal neutron and synchrotron X-ray diffraction

2010 ◽  
Vol 66 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Neeraj Sharma ◽  
Rene B. Macquart ◽  
Maxim Avdeev ◽  
Mogens Christensen ◽  
Garry J. McIntyre ◽  
...  
Keyword(s):  
Solid Solution ◽  
Single Crystal ◽  
X Ray Diffraction ◽  
Cation Site ◽  
X Ray ◽  
Oxide Ion Conductivity ◽  
Solid Solution Region ◽  
Solution Region ◽  
First Time ◽  
Oxide Ion

Single crystals of composition Bi35.66W4.34O66.51 (or Bi8.2WO15.3, bismuth tungsten oxide), within the type (Ib) solid-solution region of the Bi2O3–WO3 system, were synthesized using the floating-zone furnace method. Synchrotron X-ray and neutron single-crystal diffraction data were used to confirm the previously tentative assignment of the room-temperature space group as I41. Fourier analysis of the combined X-ray and neutron datasets was used to elucidate and refine fully the cation and anion arrays for the first time. The mixed cation site M1 is shown to be coordinated by eight O atoms in an irregular cube when M = Bi, and by six O atoms in an octahedron when M = W. The resulting disorder in the average structure around M1 is discussed in the context of experimentally observed oxide-ion conductivity.

Ionic Conductivity Study on the New High Oxide Conducting Perovskite LaGaO3

1998 ◽  
Vol 527 ◽  
Author(s):  
G.V.M. Kiruthika ◽  
U.V. Varadaraju
Keyword(s):  
Activation Energy ◽  
Ionic Conductivity ◽  
Single Phase ◽  
Ion Conductivity ◽  
Lanthanum Gallate ◽  
Migration Energy ◽  
Ion Migration ◽  
Oxide Ion Conductivity ◽  
Unit Cell Size ◽  
Oxide Ion

ABSTRACTOxide ion conductivity studies have been done on the Lanthanum Gallate based compounds. Yttrium substitution at the Ga site has been attempted to increase the unit cell size. Single phase was obtained for limited Y substituion i.e., La0.9Sr0.1Ga0.7Y0.1Mg0.2O3-x. It is found that the activation energy for the oxide ion conductivity has decreased for this composition. Based on the tolerance factor and B-site radius values, the migration energies were obtained for the LaGaO3 based perovskites. It is observed that migration energy has been significantly reduced upon substitution at the B-site. Absence of an enhancement in the conductivity with Yttrium substitution could be due to the vaccancy ordering inhibiting the oxide ion migration.

Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4

2016 ◽  
Vol 18 (16) ◽  
pp. 11125-11131 ◽  
Author(s):  
T. Ishihara ◽  
J. Hyodo ◽  
H. Schraknepper ◽  
K. Tominaga ◽  
S. Ida
Keyword(s):  
Electrical Conductivity ◽  
Ionic Conductivity ◽  
Oxygen Concentration ◽  
Ion Conductivity ◽  
Interstitial Oxygen ◽  
Oxide Ion Conductivity ◽  
Oxide Ionic Conductivity ◽  
Oxide Ion

Pt dispersion in Pr2NiO4 based oxides formed compressed strain and electrical conductivity decreases, however, the oxide ion conductivity increases by the compressed strain due to the decreased hole and the increased interstitial oxygen concentration.

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