Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 783-788 |
| Seitenumfang | 6 |
| Fachzeitschrift | Journal of solid state chemistry |
| Jahrgang | 181 |
| Ausgabenummer | 4 |
| Frühes Online-Datum | 26 Jan. 2008 |
| Publikationsstatus | Veröffentlicht - Apr. 2008 |
Abstract
Series of compounds in the system NaxNbyW1-yO3 were prepared according to the appropriate molar ratio of Na2WO4, WO3, WO2 and Nb2O5 with x=0.80 and 0.0≤y≤0.4 at 600 °C in evacuated silica glass tubes. These compounds were investigated by X-ray powder diffraction, optical microscopy, microprobe analysis, Raman and optical microspectroscopy. A y-dependent separation into three distinct coloured crystallites with cubic perovskite-type structures is observed: (i) red-orange crystallites with composition NaxWO3 with slightly decreasing x (i.e. 0.8-0.72) with increasing nominal y, (ii) bluish solid solution of composition NaxNbyW1-yO3 and (iii) white crystallites of a new phase having defect perovskite-type structure with composition Na0.5NbO2.75.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Werkstoffwissenschaften (insg.)
- Keramische und Verbundwerkstoffe
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Chemie (insg.)
- Physikalische und Theoretische Chemie
- Chemie (insg.)
- Anorganische Chemie
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
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in: Journal of solid state chemistry, Jahrgang 181, Nr. 4, 04.2008, S. 783-788.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Solid-state synthesis in the system Na0.8NbyW1-yO3 with 0≤y≤0.4
T2 - A new phase, Na0.5NbO2.75, with perovskite-type structure
AU - Debnath, Tapas
AU - Rüscher, Claus H.
AU - Gesing, Thorsten M.
AU - Koepke, Jürgen
AU - Hussain, Altaf
N1 - Funding Information: The authors would like to thank Mr. Otto Diedrich for polishing the samples. Tapas Debnath is grateful to “Land Niedersachsen” for the funding “Lichtenberg Stipendium”. This work has been partially financed by the Alexander von Humboldt Stiftung under collaborative research programme (V-FOKOOP/DEU/1062067/Hussain).
PY - 2008/4
Y1 - 2008/4
N2 - Series of compounds in the system NaxNbyW1-yO3 were prepared according to the appropriate molar ratio of Na2WO4, WO3, WO2 and Nb2O5 with x=0.80 and 0.0≤y≤0.4 at 600 °C in evacuated silica glass tubes. These compounds were investigated by X-ray powder diffraction, optical microscopy, microprobe analysis, Raman and optical microspectroscopy. A y-dependent separation into three distinct coloured crystallites with cubic perovskite-type structures is observed: (i) red-orange crystallites with composition NaxWO3 with slightly decreasing x (i.e. 0.8-0.72) with increasing nominal y, (ii) bluish solid solution of composition NaxNbyW1-yO3 and (iii) white crystallites of a new phase having defect perovskite-type structure with composition Na0.5NbO2.75.
AB - Series of compounds in the system NaxNbyW1-yO3 were prepared according to the appropriate molar ratio of Na2WO4, WO3, WO2 and Nb2O5 with x=0.80 and 0.0≤y≤0.4 at 600 °C in evacuated silica glass tubes. These compounds were investigated by X-ray powder diffraction, optical microscopy, microprobe analysis, Raman and optical microspectroscopy. A y-dependent separation into three distinct coloured crystallites with cubic perovskite-type structures is observed: (i) red-orange crystallites with composition NaxWO3 with slightly decreasing x (i.e. 0.8-0.72) with increasing nominal y, (ii) bluish solid solution of composition NaxNbyW1-yO3 and (iii) white crystallites of a new phase having defect perovskite-type structure with composition Na0.5NbO2.75.
KW - Perovskite
KW - Tungsten bronze
UR - http://www.scopus.com/inward/record.url?scp=41249104044&partnerID=8YFLogxK
U2 - 10.1016/j.jssc.2008.01.027
DO - 10.1016/j.jssc.2008.01.027
M3 - Article
AN - SCOPUS:41249104044
VL - 181
SP - 783
EP - 788
JO - Journal of solid state chemistry
JF - Journal of solid state chemistry
SN - 0022-4596
IS - 4
ER -