Process for producing a powder of perovskite-type double oxide
A process is described for producing a powder of perovskite-type double oxide represented by the formula ABO[sub 3], wherein A represents a metal material which is at least one member selected from the group consisting of Pb and a combination of Pb and at least one element selected form among Ba, Sr, Ca, La, and Li, B represents a metal material selected from the group consisting of a combination of Nb and at least one additional element selected from among Zn, Mg, Zr, Ti, Ni, Fe, W, Co, and Mn, and 0 represents oxygen, comprising the steps of: forming a homogeneous solution containing metal material B, by adding a solution containing a metal ion of Nb to a solution containing a metal ion of at least on of said additional element thereby preparing a homogeneous containing metal material B; reacting a solution containing a metal material A, and an aqueous solution of alkaline metal in a reaction vessel, thereby precipitating the hydroxide of metal material A; adding said homogeneous solution containing metal material B to said hydroxide precipitate of metal material A in a reaction vessel, thereby precipitating the hydroxide of metal material B in the obtained mixture; reacting hydrothermally the obtained mixture in the reaction vessel; filtering the reacted mixture; cleaning and drying the filtered precipitate; and heat-treating and pulverizing the dried precipitate.
- Assignee:
- IMS; EDB-93-106277
- Patent Number(s):
- A; US 5229101
- Application Number:
- PPN: US 7-638960
- OSTI ID:
- 6352461
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COBALT COMPOUNDS
COBALT OXIDES
DISPERSIONS
FABRICATION
HYDROGEN COMPOUNDS
HYDROXIDES
IRON COMPOUNDS
IRON OXIDES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LITHIUM COMPOUNDS
LITHIUM OXIDES
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MANGANESE COMPOUNDS
MANGANESE OXIDES
MIXTURES
NICKEL COMPOUNDS
NICKEL OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
POWDERS
PRECIPITATION
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SOLUTIONS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
ZINC COMPOUNDS
ZINC OXIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES