Raman scattering and X-ray diffraction investigations of sol–gel derived SBN powders

Autor:	Kin-hung Wong, Melanie M.T. Ho, Chee Leung Mak
Rok vydání:	1999
Předmět:	Materials science Annealing (metallurgy) Inorganic chemistry Analytical chemistry Quaternary compound Tetragonal crystal system symbols.namesake X-ray crystallography Materials Chemistry Ceramics and Composites symbols Orthorhombic crystal system Raman spectroscopy Raman scattering Sol-gel
Zdroj:	Journal of the European Ceramic Society. 19:1115-1118
ISSN:	0955-2219
DOI:	10.1016/s0955-2219(98)00385-9
Popis:	Sol–gel derived Sr x Ba 1- x Nb 2 O 6 (SBN) powders were prepared at an annealing temperature of 1200°C. Their structural changes were characterized by Raman spectroscopy and X-ray diffractometry. Changes in the peak position and the relative intensity of the Raman spectra and X-ray patterns were examined for different values of x . Our results suggest that the SBN powders consist of a mixture of orthorhombic phase BaNb 2 O 6 (BN) and tetragonal tungsten-bronze phase (TTB) SBN powders for x 2 O 6 (SN) and TTB phase SBN powders for x >0·5. Pure TTB type SBN powders with x ≠0·5, however, were obtained at higher annealing temperatures. A possible formation route of the sol–gel derived SBN powder is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dcc9edc9b9b6b2f15897bddb96743b47 https://doi.org/10.1016/s0955-2219(98)00385-9 Zobrazit plný text záznamu Full Text from ScienceDirect