The conductivity and ionic transport of doped bismuth titanate pyrochlore Bi1.6MxTi2O7 - δ (M - Mg, Sc, Cu)

被引：36

作者：

Krasnov, A. G. ^{[1
]}

Piir, I. V. ^{[1
]}

Koroleva, M. S. ^{[1
]}

Sekushin, N. A. ^{[1
]}

Ryabkov, Y. I. ^{[1
]}

Piskaykina, M. M. ^{[2
]}

Sadykov, V. A. ^{[3
,4
]}

Sadovskaya, E. M. ^{[3
,4
]}

Pelipenko, V. V. ^{[3
]}

Eremeev, N. F. ^{[3
]}

机构：

[1] UB RAS, Inst Chem, Komi Sci Ctr, Syktyvkar, Russia

[2] Ukhta State Tech Univ, Ukhta, Russia

[3] Boreskov Inst Catalysis SB RAS, Novosibirsk, Russia

[4] Novosibirsk State Univ, Novosibirsk, Russia

来源：

SOLID STATE IONICS | 2017年 / 302卷

关键词：

Bismuth-titanates; Pyrochlore; Conductivity; Oxygen isotope exchange; ELECTRICAL-PROPERTIES; BI2TI2O7; TEMPERATURE; RELAXATION; NEUTRON; DIFFRACTION;

D O I：

10.1016/j.ssi.2016.12.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pyrochlores Mg-, Sc-, Cu-doped bismuth titanates have been obtained. The results of X-ray powder diffraction structure refinement and the pycnometric density measurement point to the preference of the dopants distribution in the A-sites of the pyrochlore structure. Electric properties were studied for single phase compounds. The mixed electron-ionic conductivity was indicated in these samples. The high temperature (T> 300 degrees C) relaxation process was observed in Bi1.6MxTi2O7- (delta) at the range of frequency 10(3)-10(6) Hz. Oxygen mobility and surface reactivity of Bi1.6M0.2Ti2O7- (delta) (M Sc, Mg and Cu) and Bi1.4Mg0.2Ti2O7- (delta) samples were studied by using temperature programmed isotope exchange (TPIE) with (CO2)-O-18 in flow and closed reactors. According to TPIE data the regular lattice oxygen is homogeneous from the point of view of its mobility. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：118 / 125

页数：8

共 36 条

[31] Impedance spectroscopic investigation on electrical conduction and relaxation in manganese substituted pyrochlore type semiconducting oxides [J].