Coexistence of triclinic and monoclinic phases in WO3 ceramics

Autor:	U. U. Gomes, J. Mendes Filho, A. G. Souza-Filho, Valder N. Freire, J. F. Julião, José Marcos Sasaki
Rok vydání:	2000
Předmět:	Microprobe Materials science Analytical chemistry Sintering Mineralogy Atmospheric temperature range Triclinic crystal system symbols.namesake Phase (matter) symbols General Materials Science Raman spectroscopy Spectroscopy Monoclinic crystal system
Zdroj:	Journal of Raman Spectroscopy. 31:451-454
ISSN:	1097-4555 0377-0486
Popis:	The coexistence of phases in WO3 ceramics sintered within the 600–1000 °C temperature range is investigated using Raman microprobe spectroscopy. The analysis of vibrational modes indicates the existence of triclinic (VI) P1 and monoclinic (V) P21/n phases mixing. The concentration ratio between WO3 microcrystals in the former and the latter phases is shown to depend on the ceramics sintering temperature, reaching a maximum value favouring the triclinic (VI) P1 phase at the 800 °C sintering temperature. Copyright © 2000 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
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