Journal article Open Access

Thermally stimulated oxygen desorption in Sr2FeMoO6-δ

Kalanda, Nikolay A.


Citation Style Language JSON Export

{
  "publisher": "NUST MISiS", 
  "DOI": "10.3897/j.moem.4.1.33270", 
  "container_title": "Modern Electronic Materials", 
  "title": "Thermally stimulated oxygen desorption in Sr2FeMoO6-\u03b4", 
  "issued": {
    "date-parts": [
      [
        2018, 
        5, 
        1
      ]
    ]
  }, 
  "abstract": "<p>Polycrystalline Sr<sub>2</sub>FeMoO<sub>6-\u03b4</sub> specimens have been obtained by solid state synthesis from partially reduced SrFeO<sub>2,52</sub> and SrMoO<sub>4</sub> precursors. It has been shown that during oxygen desorption from the Sr<sub>2</sub>FeMoO<sub>6-\u03b4</sub> compound in polythermal mode in a 5%H<sub>2</sub>/Ar gas flow at different heating rates, the oxygen index 6-\u03b4 depends on the heating rate and does not achieve saturation at T = 1420 K. Oxygen diffusion activation energy calculation using the Merzhanov method has shown that at an early stage of oxygen desorption from the Sr<sub>2</sub>FeMoO<sub>6-\u03b4</sub> compound the oxygen diffusion activation energy is the lowest \u0415<sub>\u0430</sub> = 76.7 kJ/mole at \u03b4 = 0.005. With an increase in the concentration of oxygen vacancies, the oxygen diffusion activation energy grows to \u0415<sub>\u0430</sub> = 156.3 kJ/mole at \u03b4 = 0.06. It has been found that the d\u03b4/dt = f (\u0422) and d\u03b4/dt = f (\u03b4) functions have a typical break which allows one to divide oxygen desorption in two process stages. It is hypothesized that an increase in the concentration of oxygen vacancies V<sub>o</sub><sup>\u2022\u2022</sup> leads to their mutual interaction followed by ordering in the Fe/Mo-01 crystallographic planes with the formation of various types of associations.</p>", 
  "author": [
    {
      "family": "Kalanda, Nikolay A."
    }
  ], 
  "page": "1-5", 
  "volume": "4", 
  "type": "article-journal", 
  "issue": "(1)", 
  "id": "2551905"
}
33
35
views
downloads
Views 33
Downloads 35
Data volume 22.8 MB
Unique views 25
Unique downloads 33

Share

Cite as