Synthesis and characterization of niobium substituted hexagonal tungsten bronzes

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • A. Hussain
  • A. Ul-Monir
  • M. M. Murshed
  • C. H. Rüscher

Organisationseinheiten

Externe Organisationen

  • University of Dhaka
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Details

OriginalspracheEnglisch
Seiten (von - bis)416-420
Seitenumfang5
FachzeitschriftZeitschrift fur Anorganische und Allgemeine Chemie
Jahrgang628
Ausgabenummer2
PublikationsstatusVeröffentlicht - 13 Feb. 2002

Abstract

Alkali metal tungsten bronzes, M xWO 3, and its niobium substituted forms, M xNb yW 1-yO 3, have been prepared with M = K and Rb and nominal compositions of x = 0.20, 0.25, 0.30 and 0.0 ≤ y ≤ 0.20 at temperatures between 600 and 900°C. The X-ray powder patterns reveal that single phases of niobium substituted hexagonal tungsten bronze (HTB) can be prepared for x = 0.2, y ≤ 0.05; x = 0.25, y ≤ 0.125 and x = 0.3, y ≤ 0.15. Investigations of the optical reflectivity and the infrared absorption of Rb 0.3Nb yW 1-yO 3 indicate a decreasing concentration of free carrier with increasing niobium content.

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Synthesis and characterization of niobium substituted hexagonal tungsten bronzes. / Hussain, A.; Ul-Monir, A.; Murshed, M. M. et al.
in: Zeitschrift fur Anorganische und Allgemeine Chemie, Jahrgang 628, Nr. 2, 13.02.2002, S. 416-420.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Hussain A, Ul-Monir A, Murshed MM, Rüscher CH. Synthesis and characterization of niobium substituted hexagonal tungsten bronzes. Zeitschrift fur Anorganische und Allgemeine Chemie. 2002 Feb 13;628(2):416-420. doi: 10.1002/1521-3749(200202)628:2<416::AID-ZAAC416>3.0.CO;2-A
Hussain, A. ; Ul-Monir, A. ; Murshed, M. M. et al. / Synthesis and characterization of niobium substituted hexagonal tungsten bronzes. in: Zeitschrift fur Anorganische und Allgemeine Chemie. 2002 ; Jahrgang 628, Nr. 2. S. 416-420.
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AU - Hussain, A.

AU - Ul-Monir, A.

AU - Murshed, M. M.

AU - Rüscher, C. H.

PY - 2002/2/13

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N2 - Alkali metal tungsten bronzes, M xWO 3, and its niobium substituted forms, M xNb yW 1-yO 3, have been prepared with M = K and Rb and nominal compositions of x = 0.20, 0.25, 0.30 and 0.0 ≤ y ≤ 0.20 at temperatures between 600 and 900°C. The X-ray powder patterns reveal that single phases of niobium substituted hexagonal tungsten bronze (HTB) can be prepared for x = 0.2, y ≤ 0.05; x = 0.25, y ≤ 0.125 and x = 0.3, y ≤ 0.15. Investigations of the optical reflectivity and the infrared absorption of Rb 0.3Nb yW 1-yO 3 indicate a decreasing concentration of free carrier with increasing niobium content.

AB - Alkali metal tungsten bronzes, M xWO 3, and its niobium substituted forms, M xNb yW 1-yO 3, have been prepared with M = K and Rb and nominal compositions of x = 0.20, 0.25, 0.30 and 0.0 ≤ y ≤ 0.20 at temperatures between 600 and 900°C. The X-ray powder patterns reveal that single phases of niobium substituted hexagonal tungsten bronze (HTB) can be prepared for x = 0.2, y ≤ 0.05; x = 0.25, y ≤ 0.125 and x = 0.3, y ≤ 0.15. Investigations of the optical reflectivity and the infrared absorption of Rb 0.3Nb yW 1-yO 3 indicate a decreasing concentration of free carrier with increasing niobium content.

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