Investigation of the formation features of the 2P/RS phase in alumonickelates Sr3Ni2 – x AlxO7 – δ (0.5 ≤ x ≤ 0.75)

  • Inga M. Kharlamova A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Browki Street, Minsk 220072, Belarus
  • Leonid V. Makhnach Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus
  • Alexandra E. Usenka Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus
  • Evguenia V. Korobko A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Browki Street, Minsk 220072, Belarus
  • Vladimir V. Pankov Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

Abstract

In the present work the formation features of the crystal structure of the 2P/RS phase (P is a layer of perovskite, RS is a layer of rock salt) were investigated and the optimal conditions for the synthesis of the phase in Sr3Ni2 – xAlx O7 – δ (0.5 ≤ x ≤ 0.75) solid solutions were established. The role of intermediate oxide compounds formed at the stage preceding the formation of these solid solutions was demonstrated.  The following binary oxides and solid solutions derived from them were found as intermediate compounds in the temperature range 900–1100 °C: Sr9Ni7O21, Sr3Al2O6, Sr9Ni7 – x Alx O21 (0 < x ≤ 0.2), Sr3Al2 – x Nix O6 (0 < x ≤ 0.1). Oxide compounds Sr9Ni7 – x Alx O21 (0 < х ≤ 0.2) decomposed at 1030 °C in air and at 1120 °C in an oxygen flow.  The use of intermediate compounds as precursors made it possible to optimise the process of formation of the 2P/RS phase, i. e. to decrease the synthesis temperature by 30–40 °C and to reduce the synthesis duration by 8–10 h. 

Author Biographies

Inga M. Kharlamova, A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Browki Street, Minsk 220072, Belarus

researcher at the laboratory of rheophysics and macrokinetics

Leonid V. Makhnach, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

PhD (chemistry); senior researcher at the laboratory of physical chemistry of condensed systems, department of physical chemistry, faculty of chemistry

Alexandra E. Usenka, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

PhD (chemistry), docent; head of the department of physical chemistry, faculty of chemistry

Evguenia V. Korobko, A. V. Luikov Heat and Mass Transfer Institute, National Academy of Sciences of Belarus, 15 P. Browki Street, Minsk 220072, Belarus

doctor of science (engineering), full professor; head of the laboratory of rheophysics and macrokinetics

Vladimir V. Pankov, Belarusian State University, 4 Niezaliezhnasci Avenue, Minsk 220030, Belarus

doctor of science (chemistry); professor at the department of physical chemistry, faculty of chemistry

References

  1. Kharlamova IM, Makhnach LV, Usenka AE, Lyakhov AS, Ivashkevich LS, Pankov VV. Ruddlesden – Popper phases Sr3Ni2 – х AlxO7 – δ and some doped derivatives: synthesis, oxygen nonstoichiometry and electrical properties. Solid State Ionics. 2018;324:241–246. DOI: 10.1016/j.ssi.2018.07.016.
  2. Werner P-E, Eriksson L, Westdahl M. TREOR, a semi-exhaustive trial-and-error powder indexing program for all symmetries. Journal of Applied Crystallography. 1985;18(5):367–370. DOI: 10.1107/S0021889885010512.
  3. Dollase WA. Correction of intensities for preferred orientation in powder diffractometry: application of the March model. Journal of Applied Crystallography. 1986;19(4):267–272. DOI: 10.1107/S0021889886089458.
  4. Zinkevich M. Constitution of the Sr – Ni – O system. Journal of Solid State Chemistry. 2005;178(9):2818–2824. DOI: 10.1016/j.jssc.2005.06.035.
  5. Bugaenko LT, Ryabykh SM, Bugaenko AL. A near total system of the average ionic crystallo-graphic radius and their usage for ionization potentials determination. Vestnik Moskovskogo universiteta. Seriya 2, Khimiya. 2008;49(6):363–384. Russian.
Published
2023-09-20
Keywords: strontium alumonickelates, precursors, solid solutions, Ruddlesden – Popper phases
Supporting Agencies This work was supported by the National Academy of Sciences of Belarus and the Ministry of Education of the Republic of Belarus, as well as state programme of scientific research «Energy and nuclear processes and technologies» (state registration No. 20212391).
How to Cite
Kharlamova, I. M., Makhnach, L. V., Usenka, A. E., Korobko, E. V., & Pankov, V. V. (2023). Investigation of the formation features of the 2P/RS phase in alumonickelates Sr3Ni2 – x AlxO7 – δ (0.5 ≤ x ≤ 0.75). Journal of the Belarusian State University. Chemistry, 2, 22-28. Retrieved from https://journals.bsu.by/index.php/chemistry/article/view/5720
Issue
No 2 (2023): Journal of the Belarusian State University. Chemistry
Section
Original Articles

Copyright (c) 2023 Journal of the Belarusian State University. Chemistry

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