Synthesis and Oxygen Mobility of Bismuth Cerates and Titanates with Pyrochlore Structure | Sciact - CRIS-system of Boreskov Institute of Catalysis

Synthesis and Oxygen Mobility of Bismuth Cerates and Titanates with Pyrochlore Structure Full article

Journal

Membranes
ISSN: 2077-0375

Output data

Year: 2023, Volume: 13, Number: 6, Article number : 598, Pages count : 13 DOI: 10.3390/membranes13060598

Tags

oxygen separation membranes; pyrochlores; bismuth cerate; bismuth titanate; oxygen mobility

Authors

Bespalko Yuliya ¹ , Eremeev Nikita ¹ , Sadovskaya Ekaterina ¹ , Krieger Tamara ¹ , Bulavchenko Olga ¹ , Suprun Evgenii ¹ , Mikhailenko Mikhail ² , Korobeynikov Mikhail ³ , Sadykov Vladislav ¹

Affiliations

1	Federal Research Center, Boreskov Institute of Catalysis SB RAS, Novosibirsk, Akad. Lavrentieva Ave. 5, 630090 Novosibirsk, Russia
2	Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze Str. 18, 630128 Novosibirsk, Russia
3	Budker Institute of Nuclear Physics SB RAS, Akad. Lavrentieva Ave. 11, 630090 Novosibirsk, Russia

Funding (1)

Russian Science Foundation

23-73-00045

Synthesis and study of materials based on bismuth cerates and titanates were carried out. Complex oxides Bi1.6Y0.4Ti2O7 were synthesized by the citrate route; Bi2Ce2O7 and Bi1.6Y0.4Ce2O7—by the Pechini method. The structural characteristics of materials after conventional sintering at 500–1300 °C were studied. It is demonstrated that the formation of a pure pyrochlore phase, Bi1.6Y0.4Ti2O7, occurs after high-temperature calcination. Complex oxides Bi2Ce2O7 and Bi1.6Y0.4Ce2O7 have a pyrochlore structure formed at low temperatures. Yttrium doping of bismuth cerate lowers the formation temperature of the pyrochlore phase. As a result of calcination at high temperatures, the pyrochlore phase transforms into the CeO2-like fluorite phase enriched by bismuth oxide. The influence of radiation-thermal sintering (RTS) conditions using e-beams was studied as well. In this case, dense ceramics are formed even at sufficiently low temperatures and short processing times. The transport characteristics of the obtained materials were studied. It has been shown that bismuth cerates have high oxygen conductivity. Conclusions are drawn about the oxygen diffusion mechanism for these systems. The materials studied are promising for use as oxygen-conducting layers in composite membranes.

Bespalko Y. , Eremeev N. , Sadovskaya E. , Krieger T. , Bulavchenko O. , Suprun E. , Mikhailenko M. , Korobeynikov M. , Sadykov V.
Synthesis and Oxygen Mobility of Bismuth Cerates and Titanates with Pyrochlore Structure
Membranes. 2023. V.13. N6. 598 :1-13. DOI: 10.3390/membranes13060598 WOS Scopus РИНЦ AN PMID OpenAlex

Submitted:	May 5, 2023
Accepted:	Jun 9, 2023
Published print:	Jun 13, 2023
Published online:	Jun 13, 2023

Web of science:	WOS:001014639600001
Scopus:	2-s2.0-85163927408
Elibrary:	54006871
Chemical Abstracts:	2023:1401734
PMID:	37367802
OpenAlex:	W4380686503

DB	Citing
Elibrary	3
OpenAlex	5
Scopus	4
Web of science	3