Gellability zone for aluminium alkoxides
نویسندگان
چکیده
منابع مشابه
Gellability zone for aluminium alkoxides
Ethyl acetoacetate modi®ed aluminium sec-butoxide can be hydrolysed and gelled with alkaline, neutral or acidic media within a pH range of 3.0±8.5. Alumina precipitation occurs if pH values at any point in the sol±gel transition are outside this range. Nine dierent gelling agents have been evaluated for pH dependence of gel point. Based on stoichiometric considerations, only those systems with...
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New halogen-containing tetrametallic aluminium alkoxides of formula [Al{(mu-OEt)2AlMeCl}3] ( 2-cis; 2-trans), and [Al{(mu-OEt)2AlBr2}3] ( 4), have been synthesized by combining Al(OEt)3 and Me2AlCl (for 2) or EtAlBr2 (for 4). They were fully characterized by (1H, 27Al) NMR, IR, mp, elemental analysis, and single-crystal X-ray diffractometry. The chloride analogue of 4, [Al{(mu-OEt)2AlCl2}3] ( 3...
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Daniel Krewski, Robert A Yokel, Evert Nieboer, David Borchelt, Joshua Cohen, Jean Harry7, Sam Kacew2,8, Joan Lindsay9, Amal M Mahfouz10, Virginie Rondeau11 1Department of Epidemiology and Community Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada, McLaughlin Centre for Population Health Risk Assessment, Institute of Population Health, University of Ottawa, Ottawa, On...
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Antiperspirants denote cosmetic products with an anti-perspiration effect which are available as roll-ons, sticks, creams or aerosols (sprays). The anti-perspiration effect is achieved by means of aluminium salts which block the ends of the sweat ducts for a certain amount of time. The safety of aluminium and antiperspirants continues to be critically examined. This is notably true with regard ...
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ژورنال
عنوان ژورنال: Ceramics International
سال: 1999
ISSN: 0272-8842
DOI: 10.1016/s0272-8842(98)00074-1