Inorganic salts as peptizing agents in the preparation of metal oxide sol-gel compositions
A method is described of preparing a metal oxide sol, the method comprising the steps of: hydrolyzing and peptizing a metal alkoxide in the presence of an excess of aqueous medium and in the presence of a metal nitrate used as a peptizing agent, the metal alkoxide, the medium and the nitrate being present in a proportion, and the hydrolysis and the peptizing being conducted at a temperature and for a time effective to obtain a sol whose colloids have a particle size of up to and including 10 microns. A method is also described for obtaining a metal oxide sol-gel, comprising: (a) the method of claim 1 to obtain a sol; and (b) partially reducing the volume of the aqueous medium of the sol to obtain a sol-gel.
- Assignee:
- Univ. of Florida, Gainsville, FL
- Patent Number(s):
- US 4801399
- OSTI ID:
- 6300886
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELEMENTS
HYDROLYSIS
LYSIS
METALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEPTIDES
PROTEINS
SOL-GEL PROCESS
SOLUTIONS
SOLVOLYSIS
SYNTHESIS
TEMPERATURE DEPENDENCE
TIME DEPENDENCE