Structural and Transport Properties of Doped Bismuth Titanates and Niobates | Sciact - CRIS-system of Boreskov Institute of Catalysis

Structural and Transport Properties of Doped Bismuth Titanates and Niobates Full article

Journal

Solid State Ionics
ISSN: 0167-2738

Output data

Year: 2018, Volume: 315, Pages: 33-39 Pages count : 7 DOI: 10.1016/j.ssi.2017.12.008

Tags

Bismuth titanates/niobates, Conductivity, Oxygen mobility, Structure

Authors

Sadykov V. A. ^1,2 , Koroleva M. S. ³ , Piir I. V. ³ , Chezhina N. V. ⁴ , Korolev D. A. ⁴ , Skriabin P. I. ¹ , Krasnov A. V. ¹ , Sadovskaya E. M. ^1,2 , Eremeev N. F. ¹ , Nekipelov S. V. ⁵ , Sivkov V.N. ⁵

Affiliations

1	Boreskov Institute of Catalysis SB RAS, pr. Akad. Lavrentieva 5, Novosibirsk, Russian Federation
2	Novosivirsk State University, Pirogova str. 2, Novosibirsk, Russian Federation
3	Institute of Chemistry Komi SC UB RAS, Pervomayskaya St. 48, Syktyvkar, Russian Federation
4	Sankt-Petersburg State University, Universitetskaya nab 7/9, Sankt-Petersburg, Russian Federation
5	Department of Mathematics, Komi SC UB RAS, Chernova St. 3a, Syktyvkar, Russian Federation

Funding (2)

1	Russian Science Foundation	16-13-00112
2	Russian Foundation for Basic Research	15-03-09173

Cobalt- or Zn-doped bismuth titanates and Mg + Cu-doped bismuth niobate were synthesized by the method of org.-inorg. precursors combustion. Distribution of dopants over the sites of the pyrochlore structure was elucidated by X-ray powder diffraction structure refinement and pycnometric d. anal. Zinc and cobalt cations are mainly located in Bi sites appearing also in Ti sites at their high content. Mg cations are located only in Nb sites, while Cu cations are equally distributed between Bi and Nb sites. Magnetic susceptibility data confirm Co2 + state of cobalt atoms revealed by NEXAFS. Antiferromagnetic exchange appears when Co atoms enter the titanium sites. Electronic cond. of p-type dominates for Co-doped samples in the 160-750 °C temp. range. The oxygen mobility and surface reactivity were studied by the oxygen isotope heteroexchange with C18O2 in isothermal and temp.-programmed modes. Mobility of the lattice oxygen can be described by a homogeneous model. The oxygen mobility and surface reactivity are comparable for doped bismuth titanates and niobates correlating with cond. and being the highest for Co and Cu-doped samples with disordered distribution of dopants between lattice sites.

Sadykov V.A. , Koroleva M.S. , Piir I.V. , Chezhina N.V. , Korolev D.A. , Skriabin P.I. , Krasnov A.V. , Sadovskaya E.M. , Eremeev N.F. , Nekipelov S.V. , Sivkov V.N.
Structural and Transport Properties of Doped Bismuth Titanates and Niobates
Solid State Ionics. 2018. V.315. P.33-39. DOI: 10.1016/j.ssi.2017.12.008 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Sep 21, 2017
Accepted:	Dec 5, 2017
Published online:	Dec 22, 2017
Published print:	Feb 1, 2018

Web of science:	WOS:000424181500006
Scopus:	2-s2.0-85037523162
Elibrary:	35505518
Chemical Abstracts:	2017:1951095
OpenAlex:	W2776295881

DB	Citing
Web of science	22
Scopus	24
Elibrary	27
OpenAlex	23