Li, Wenjie ; Gurlo, Aleksander ; Ionescu, Emanuel ; Riedel, Ralf (2012)
Perovskite Structure Stability in Metal Oxynitrides.
In: Zeitschrift für anorganische und allgemeine Chemie, 638 (10)
doi: 10.1002/zaac.201204129
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Metal oxynitrides with perovskite structure have been shown to exhibit promising and intriguing optical, dielectric, magnetoresistive or photocatalytic properties.1 They are formally obtained from perovskite oxides via substitution of oxygen by nitrogen.2 However, due to the stability of the M–O bond, only a limited number of nitrogen-doped perovskitesABO3–xNx) and stoichiometric oxynitrides (ABO2N and ABON2) has been synthesized and studied so far. Different case studies revealed that the oxidation states of the cations, the O/N ratio, as well as the anion ordering significantly affect their properties. In the present work we investigate the effect of these parameters on the stability of the perovskite phase in oxynitrides. On one hand we apply the Goldschmidt (tolerance) factor to assess the geometrical stability of the perovskite structure in oxynitrides. On the other hand, we consider the mechanism of charge compensation in nitride-substituted oxides (N3– vs. O2–). The latter requires an increase in the oxidation state of the substituent cations, which contradicts the reduction processes occurring upon high-temperature ammonolysis. The present approach allows for predicting the stability of the perovskite structure in oxynitrides and is supported by our results related to the synthesis of the Ba–Mo–O/N, Ba–W–O/N, La–Mo–O/N, Sr–Mo–O/N and Ba–V–O/N compounds.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Li, Wenjie ; Gurlo, Aleksander ; Ionescu, Emanuel ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Perovskite Structure Stability in Metal Oxynitrides |
| Sprache: | Englisch |
| Publikationsjahr: | August 2012 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Zeitschrift für anorganische und allgemeine Chemie |
| Jahrgang/Volume einer Zeitschrift: | 638 |
| (Heft-)Nummer: | 10 |
| DOI: | 10.1002/zaac.201204129 |
| Kurzbeschreibung (Abstract): | Metal oxynitrides with perovskite structure have been shown to exhibit promising and intriguing optical, dielectric, magnetoresistive or photocatalytic properties.1 They are formally obtained from perovskite oxides via substitution of oxygen by nitrogen.2 However, due to the stability of the M–O bond, only a limited number of nitrogen-doped perovskitesABO3–xNx) and stoichiometric oxynitrides (ABO2N and ABON2) has been synthesized and studied so far. Different case studies revealed that the oxidation states of the cations, the O/N ratio, as well as the anion ordering significantly affect their properties. In the present work we investigate the effect of these parameters on the stability of the perovskite phase in oxynitrides. On one hand we apply the Goldschmidt (tolerance) factor to assess the geometrical stability of the perovskite structure in oxynitrides. On the other hand, we consider the mechanism of charge compensation in nitride-substituted oxides (N3– vs. O2–). The latter requires an increase in the oxidation state of the substituent cations, which contradicts the reduction processes occurring upon high-temperature ammonolysis. The present approach allows for predicting the stability of the perovskite structure in oxynitrides and is supported by our results related to the synthesis of the Ba–Mo–O/N, Ba–W–O/N, La–Mo–O/N, Sr–Mo–O/N and Ba–V–O/N compounds. |
| Freie Schlagworte: | oxynitrides, stability, tolernace factor, synthesis |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 21 Mär 2013 08:29 |
| Letzte Änderung: | 21 Mär 2013 08:29 |
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