Research output: Contribution to journal › Article › peer-review
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Crystal structure and conduction of BICUTIVOX
AU - Buyanova, E. S.
AU - Petrova, S. A.
AU - Emel’yanova, Yu. V.
AU - Borodina, N. A.
AU - Zakharov, R. G.
AU - Zhukovskii, V. M.
N1 - This work was supported by the Russian Foundation for Basic Research (project no. 06-03-32378).
PY - 2009/6/1
Y1 - 2009/6/1
N2 - Existence boundaries, structure, and transport parameters were studied for Bi4V2 - x Cu Ti-x/2 O-x/2(11 - x) solid solutions. Doping levels within x = 0.025-0.15 distort the C2/m crystal lattice (this lattice is characteristic of individual the Bi4V2O11 phase) and lowers its symmetry to triclinic. The solid solutions with 0.25 a parts per thousand currency sign x a parts per thousand currency sign 0.30 crystallize in tetragonal space group I4/mmm. High-temperature X-ray diffraction and dilatometry measurements for Bi4V2 - x Cu Ti-x/2 O-x/2(11 - x) (x a parts per thousand currency sign 0.35) solid solutions verified the existence of three structural varieties within 298-1023 K. Electrical conductivity of BICUTIVOX was studied by impedance spectroscopy as a function of temperature, composition, and oxygen partial pressure. Equivalent circuits of cells were analyzed. Features of electrical conductivity versus temperature for the structural varieties are noted. Above 873 K, the solid solutions samples with x = 0.05 have the highest conductivity. At lower temperatures, higher conductivities are in the solid solutions that retain the gamma phase in the low-temperature region. The dominant oxygen-ion conduction mechanism was discovered in the solid solutions.
AB - Existence boundaries, structure, and transport parameters were studied for Bi4V2 - x Cu Ti-x/2 O-x/2(11 - x) solid solutions. Doping levels within x = 0.025-0.15 distort the C2/m crystal lattice (this lattice is characteristic of individual the Bi4V2O11 phase) and lowers its symmetry to triclinic. The solid solutions with 0.25 a parts per thousand currency sign x a parts per thousand currency sign 0.30 crystallize in tetragonal space group I4/mmm. High-temperature X-ray diffraction and dilatometry measurements for Bi4V2 - x Cu Ti-x/2 O-x/2(11 - x) (x a parts per thousand currency sign 0.35) solid solutions verified the existence of three structural varieties within 298-1023 K. Electrical conductivity of BICUTIVOX was studied by impedance spectroscopy as a function of temperature, composition, and oxygen partial pressure. Equivalent circuits of cells were analyzed. Features of electrical conductivity versus temperature for the structural varieties are noted. Above 873 K, the solid solutions samples with x = 0.05 have the highest conductivity. At lower temperatures, higher conductivities are in the solid solutions that retain the gamma phase in the low-temperature region. The dominant oxygen-ion conduction mechanism was discovered in the solid solutions.
UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000267298300008
UR - http://www.scopus.com/inward/record.url?partnerID=8YFLogxK&scp=67649965558
U2 - 10.1134/S0036023609060084
DO - 10.1134/S0036023609060084
M3 - Article
VL - 54
SP - 864
EP - 872
JO - Russian Journal of Inorganic Chemistry
JF - Russian Journal of Inorganic Chemistry
SN - 0036-0236
IS - 6
ER -
ID: 38603483