Structure and properties of mechanochemically synthesised aluminium hydroxide fluoride phases AlFx(OH)3-x· nH2O

Autor:	R. König, M. Balski, S. Brehme, Erhard Kemnitz, Gudrun Scholz
Rok vydání:	2010
Předmět:	Aluminium fluoride Aluminium hydroxide Inorganic chemistry Pyrochlore General Chemistry engineering.material Condensed Matter Physics Chemical reaction Amorphous solid chemistry.chemical_compound chemistry Mechanochemistry engineering General Materials Science Fluoride Stoichiometry
Zdroj:	Solid State Sciences. 12:1500-1506
ISSN:	1293-2558
DOI:	10.1016/j.solidstatesciences.2010.06.017
Popis:	A successful mechanochemical synthesis of nanocrystalline aluminium hydroxide fluoride samples AlFx(OH)3-x·nH2O with pyrochlore structure is described for the first time. Optimal conditions for the synthesis can be adjusted using γ-Al(OH)3 and β-AlF3·3H2O as educts applying an Al:F ratio of 1:1.5. Under these circumstances, the reaction proceeds almost stoichiometrically. On the other hand a classical solid state chemical reaction at elevated temperature is not successful with the same educts. Strongly disordered or amorphous products are obtained with differing Al:F molar ratios at the beginning. It was found that structure and water content of the educts are playing a crucial role for the product composition.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4072dd9073a1f1587028a844db8ffa67 https://doi.org/10.1016/j.solidstatesciences.2010.06.017 Zobrazit plný text záznamu Full Text from ScienceDirect