Processing issues related to the bi-dimensional ionic conductivity of BIMEVOX ceramics

Fuierer, Paul; Maier, Russell A.; Röder-Roith, Ulla; Moos, Ralf

doi:10.1007/s10853-011-5486-8

Cited by 19 publications

(9 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electrical conductivity of BIVOX and BIMEVOX has been reported. [15][16] The present paper reports on the synthesis, electrical and thermal properties of pure and 3% Zr-doped Bi 4 V 2 O 11 compounds.…”

Section: Bismuth Vanadate Bi 4 V 2 O 11 Is a Member Of The Aurivilliumentioning

confidence: 99%

Synthesis, electrical and thermal properties of Bi4V2−xZrxO11 (x = 0.0, 0.02, 0.06 and 0.10) ceramics

Roy

Sahu

2013

J Electroceram

View full text Add to dashboard Cite

Polycrystalline ceramic samples of pure and Zr +4 doped Bi4V2-xZrxO11 (x=0.0 and 0.06) have been synthesized by standard solid state reaction method using high purity oxides. The dielectric constant and dielectric loss and hence ac conductivity as a function of frequency and temperature have been measured. The dielectric studies indicate that the material is highly lossy and hence its ac conductivity increases with the increase of temperature. The dc conductivity of material has been measured as a function of temperature from room temperature to 653 K and its activation energy was calculated using the relation σ = σo exp (-Ea/kT). The Modulated Differential Scanning Calorimetry (MDSC) has been used to investigate the effect of substitution on the phase transition of the compounds.

show abstract

Section: Bismuth Vanadate Bi 4 V 2 O 11 Is a Member Of The Aurivilliumentioning

confidence: 99%

Synthesis, electrical and thermal properties of Bi4V2−xZrxO11 (x = 0.0, 0.02, 0.06 and 0.10) ceramics

Roy

Sahu

2013

J Electroceram

View full text Add to dashboard Cite

show abstract

“…While such differences are distinct in single crystals, a random polycrystalline sample exhibits an approximate average of the lattice-specific property coefficients. Enhancing the long-range texture of polycrystalline samples therefore holds promise for enhancing the desired properties of BIMEVOX ceramics; of chief interest is maximizing the bidimensional ionic conductivity [11]. Experimental techniques for enhancing the texture of anisotropic ceramics have included pulsed laser deposition [12], magnetic or electric fields [13,14], and load-assisted sintering or "hot-forging" [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Quasi-Equilibrium, Multifoil Platelets of Copper- and Titanium-Substituted Bismuth Vanadate, Bi2V0.9(Cu0.1−xTix)O5.5−δ, by Molten Salt Synthesis

Ring

Fuierer

2018

Crystals

Self Cite

View full text Add to dashboard Cite

10% copper-substituted (BiCUVOX/Bi 2 V 0.9 Cu 0.1 O 5.5−δ ) and 5% copper/titanium double-substituted bismuth vanadate (BiCUTIVOX/Bi 2 V 0.9 (Cu 0.05 Ti 0.05 )O 5.5−δ ) platelets were formed by molten salt synthesis (MSS) using a eutectic KCl/NaCl salt mixture. The product was phase-pure within the limits of X-ray diffraction. The size and form of the platelets could be controlled by changing the heating temperature and time. The crystallite growth rate at a synthesis temperature of 650 • C and the activation energy for grain growth were determined for BICUTIVOX, which experienced inhibited growth compared to BICUVOX. Quasi-equilibrium, multifoil shapes consisting of lobes around the perimeter of the platelets were observed and explained in the context of relative two-dimensional nucleation and edge growth rates.

show abstract

“…The performance of Bi 4 V 2 O 11−δ is sensitive to the preparation conditions [9][10][11]. Different colors can be observed when it is prepared by a multiple-step process with different slow heating and cooling rates.…”

Section: Introductionmentioning

confidence: 99%

“…Also, to assess the phase stability, X-ray diffraction (XRD) and differential scanning calorimetry (DSC) analyses were performed. Some reports [9][10][11] indicate that the stabilization of the γ phase depends not only on the chemical nature of dopants but also on the processing conditions. Indeed, numerous metal dopants have been widely investigated; however, only a few works use the dopants in the family of Me 5+ , specifically niobium (Nb).…”

Section: Introductionmentioning

confidence: 99%

Oxide ion conductors based on niobium-doped bismuth vanadate: conductivity and phase transition features

Khaerudini

Guan

Zhang

et al. 2015

Ionics

View full text Add to dashboard Cite

Oxide ion conductors are technologically important materials, essential for electrochemical devices such as oxygen separation membranes and solid oxide fuel cells (SOFCs). Bi 4 V 2−x Me x O 11−δ (BiMeVOx) is a well-known family of material with high ionic conductivity at low operating temperatures. However, it is often reported to possess three structurally related phase changes that affect the vacancy order/ disorder over the oxygen atom positions. This might be overcome by a careful chemical design of an oxide ion conductor by introducing the stabilizing dopants. Here, it is found that niobium (Nb) doping on the V site can increase the stability (tetragonal structure) and ionic conductivity at a temperature range of 200-600°C. This study demonstrates the effect of the doping amount on the ionic conductivity and characterizes the obtained materials by scanning electron microscopy (SEM), X-ray diffraction (XRD), and differential scanning calorimetry (DSC) analyses. The oxidation state of vanadium that related to the electronic structure of BiMeVOx is investigated by X-ray photoelectron spectroscopy (XPS) analysis. It is expected to understand the conductivity and phase transition features of this kind of oxide ion conductor.

show abstract

Processing issues related to the bi-dimensional ionic conductivity of BIMEVOX ceramics

Cited by 19 publications

References 34 publications

Synthesis, electrical and thermal properties of Bi4V2−xZrxO11 (x = 0.0, 0.02, 0.06 and 0.10) ceramics

Synthesis, electrical and thermal properties of Bi4V2−xZrxO11 (x = 0.0, 0.02, 0.06 and 0.10) ceramics

Quasi-Equilibrium, Multifoil Platelets of Copper- and Titanium-Substituted Bismuth Vanadate, Bi2V0.9(Cu0.1−xTix)O5.5−δ, by Molten Salt Synthesis

Oxide ion conductors based on niobium-doped bismuth vanadate: conductivity and phase transition features

Contact Info

Product

Resources

About