Synthesis, electrical and thermal properties of Bi4V2−xMexO11 (Me=Nb, Zr, Y and Cu with x = 0.0 and 0.06) ceramics

Roy, M.; Sahu, S.; Awasthi, A. M.; Bharadwaj, Saitanya K.

doi:10.1007/s10973-013-3361-3

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…BIMEVOX solid electrolytes are obtained by partially replacing V 5+ with pentavalent or aliovalent ions in the Bi 4 V 2 O 11 compound. Several BIMEVOX compounds have been synthesized with single or double replacements with several different metallic ions, Li + , Cu 2+ , Co 2+ , Ni 2+ , Zn 2+ , Fe 3+ , Al 3+ , Ti 4+ , Zr 4+ , Ge 4+ , Sn 4+ , Pb 4+ , Nb 5+ [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. The structural phases of Bi 4 V 2 O 11 are monoclinic (named alpha), orthorhombic from 445 • C (beta) and tetragonal from 567 • C (gamma), the gamma phase with the highest oxygen ion conductivity [23,32].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the Ionic Conductivity in Electric Field-Assisted Pressureless Sintered BITIVOX Solid Electrolytes

et al. 2019

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Bi 4 V 1.8 Ti 0.2 O 11 (BITIVOX) ceramic pellets, prepared with powders obtained by a sol gel technique, were sintered either conventionally at 800 • C/8 h or by applying an AC electric voltage, limiting the electric current through the pellets. Electric voltages were applied isothermally at 700 • C and 800 • C during 5 min in the green pellet positioned in the sample holder of a dilatometer for monitoring thickness variation. The BITIVOX pellets shrank 13.6% after applying 200 V cm −1 at 800 • C and 10.4% heating to 800 • C for 8 h. Thermal analysis and X-ray diffraction of the powders were performed to evaluate the crystallization temperature and the structural phase, respectively. The electrical behavior of the sintered BITIVOX pellets was analyzed by the impedance spectroscopy technique, showing that the sample flash sintered at 800 • C/5 min had lower bulk resistivity than the sample conventionally sintered at 800 • C/8 h. The surfaces of the sintered pellets were observed in a scanning electron microscope showing similar grain sizes and pore content in all sintered samples.

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