Chemistry of inorganic compounds – Rare earth compound
Patent
1997-12-15
2000-05-23
Bos, Steven
Chemistry of inorganic compounds
Rare earth compound
423592, 423593, 423625, C01F 1700, C01F 700
Patent
active
060663057
ABSTRACT:
This invention relates to a generic process for producing a refractory oxide which comprises reacting liquid water with: at least one metal fluoride reactant; or at least one metal fluoride reactant and at least one metal oxide reactant; or at least one metal oxide reactant and an aqueous hydrogen fluoride solution, to produce either a colloidal mixture or a solution; drying either the colloidal mixture or solution; heating the dried product to produce a solid state metal hydroxyfluoride; heating the hydroxyfluoride to a temperature at which it chemically decomposes into a cationically-homogeneous and nanostructured solid state metal oxyfluoride; and performing one of the following heating steps: (i) to a solid state decomposition-temperature where the oxyfluoride chemically decomposes into a refractory oxide; or, (ii) to a molten state decomposition-temperature where the oxyfluoride chemically decomposes into a refractory oxide; or, (iii) to a vapor state decomposition-temperature where the oxyfluoride chemically decomposes into a refractory oxide.
REFERENCES:
patent: 3941874 (1976-03-01), Payne
patent: 4402924 (1983-09-01), McVicker et al.
patent: 5558847 (1996-09-01), Kaaber et al.
LandOfFree
Production of transparent cationically-homogeneous nanostructure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of transparent cationically-homogeneous nanostructure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of transparent cationically-homogeneous nanostructure will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1834981