Process for the manufacture of electroceramics such as titanates and zirconates

Patent · Tue Jan 21 04:00:00 EST 1992

OSTI ID:5276060

Davies, J A; Dutremez, S

This patent describes a process for forming a compound of the formula AMO{sub 3} wherein A is barium or strontium or a combustion thereof, and M is titanium or zirconium. It comprises combining an aqueous acidic solution of a dissolved compound of the formula MO{sub 2} with a reactive aqueous solution formed by combining ammonium hydroxide and an ammonium hydroxide soluble aromatic compound having two adjacent carbon atoms which contain groups bearing labile hydrogen atoms, the remaining carbon atoms of the aromatic compound being bonded to hydrogen or an unreactive substituent, and reacting the combination so as to form an organo titanium ammonium compound or an organo zirconium ammonium compound which is reactable with an A(OH){sub 2} compound, reacting in an aqueous solution, the organo titanium ammonium compound or the organo zirconium ammonium compound with one or more hydroxides of the formula A(OH){sub 2} so as to form a pyrolyzable organic precursor of the AMO{sub 3} compound and pyrolyzing the precursor to form the compound of the formula AMO{sub 3}.

• Assignee: Univ. of Toledo, Toledo, OH (United States)
• Patent Number(s): US 5082812; A
• Application Number: PPN: US 7-449570
• OSTI ID: 5276060
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360601* -- Other Materials-- Preparation & Manufacture
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
BARIUM COMPOUNDS
CERAMICS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELECTRICITY
MANUFACTURING
MIXTURES
OXYGEN COMPOUNDS
PIEZOELECTRICITY
PRECURSOR
PYROLYSIS
SOLUTIONS
STRONTIUM COMPOUNDS
STRONTIUM TITANATES
THERMOCHEMICAL PROCESSES
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS