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Solid state reaction mechanism for the synthesis of La1 – xSrxCoO3–δ (0.1 ≤ x ≤ 0.7)

  • Baijun Yan , Jiayun Zhang EMAIL logo , Jianhua Liu and Changxiang Xiang
Published/Copyright: February 1, 2022
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 96 Issue 8

Abstract

The reaction process for the formation of La1–xSrxCoO3– δ (x = 0.3) from La2O3, Co3O4, and SrCO3 powder mixtures was investigated using high-temperature X-ray diffraction (HTXRD) between 298 K and 1273 K. The results indicate that an intermediate product SrCoOy appears around 1213 K.

Studies on the mechanism of the La1– xSrxCoO3– δ (0.1 ≤ x ≤ 0.7) synthesis were further performed by isothermal calcinations of compacts of La2O3, Co3O4, and SrCO3 powder mixture and those of LaCoO3–δ and SrCoOy powder mixture, respectively. The overall reaction may consist of three stages, (i) SrCoOy fromation, (ii) reaction between La2O3 and Co3O4, (iii) reaction between LaCoO3 –δ and SrCoOy. The third stage is dominated by the dissolution between La1–xSrxCoO3–δ and SrCoOy, which is probably the slowest step.

Keywords: Solid state reaction; Reaction mechanism; High temperature XRD; La1– xSrxCoO3– δ
Prof. Jiayun Zhang Dept. Physical Chemistry of Metallurgy University of Science & Technology Beijing 30 Xue Yuan Lu, Beijing 100083, P. R. China Tel.: +86 10 6233 2732 Fax: +86 10 6232 7283 +86 10 6233 2845

  1. The financial support on the project 50374008 from National Science Foundation of China is gratefully acknowledged.

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Received: 2004-10-27
Accepted: 2005-02-07
Published Online: 2022-02-01

© 2005 Carl Hanser Verlag, München

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https://doi.org/10.3139/ijmr-2005-0156
Keywords for this article
Solid state reaction; Reaction mechanism; High temperature XRD; La1– xSrxCoO3– δ

Articles in the same Issue

  1. Frontmatter
  2. Articles Basic
  3. Diffusion in molybdenum disilicide
  4. Martensitic transformation, ductility, and shape-memory effect of polycrystalline Ni56Mn25 – xFexGa19 alloys
  5. Mechanical and electrical properties of Ti2SnC dispersion-strengthened copper
  6. Thermodynamic and phase relation study of the Ni–Ge –O system in the solid state
  7. Thermodynamic assessment of Mg–Al–Mn phase equilibria, focusing on Mg-rich alloys
  8. DSC study on the phase decomposition of an Al–Cu alloy occurring during annealing at 403 K
  9. Structure and thermal stability of a melt-quenched single-phase nanocrystalline Hf61Fe39 alloy
  10. Thermodynamic assessment of the ternary Cu–Pb–O system
  11. Combined EELS, EDX, and STEM investigations of Cu-induced nanostrucutures and thin surface layer phases
  12. Articles Applied
  13. Fatigue failure of titanium implants for mandibular reconstruction
  14. Solid state reaction mechanism for the synthesis of La1 – xSrxCoO3–δ (0.1 ≤ x ≤ 0.7)
  15. Dislocation structures in 16MND5 pressure vessel steel strained in uniaxial tension at –196 °C
  16. Microstructure of AZ91 alloy deformed by equal channel angular pressing
  17. The effect of copper on secondary phase precipitation in duplex stainless steel – a thermodynamic calculations approach
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  19. Copper-lithium alloy produced by powder metallurgy procedures and its age-hardening response
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  21. Estimating ternary surface tension for systems with limited solubility
  22. Notifications/Mitteilungen
  23. Personal/Personelles
  24. News/Aktuelles
  25. Conferences/Konferenzen
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