Wet process for the production of a readily sinterable powder material of perovskite or its solid solution
A process is described for producing a powdered perovskite represented by the formula: ABO/sub 3/ wherein A is selected from the group consisting of Pb, Ba, Ca, Sr and La; and B is selected from the group consisting of Ti and Zr, which comprises contacting in a vessel an aqueous or alcohol solution of an ion of either component A or component B with a precipitating solution selected from the group consisting of solutions of ammonia, ammonium carbonate, sodium hydroxide, potassium hydroxide and oxalic acid, to form a first precipitate of the component, mixing in the vessel an aqueous or alcohol solution of the other component thereby forming a second precipitate of the other component, drying and calcining the resulting powder mixture at a temperature of from 400/sup 0/ to 1200/sup 0/C, wherein during the calcining a solid phase reaction occurs in the powder mixture to form the perovskite.
- Assignee:
- National Institute for Researches in Inorganic Materials, Niihari
- Patent Number(s):
- US 4696810
- OSTI ID:
- 6037233
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
ALKALINE EARTH METAL COMPOUNDS
AMMONIA
AMMONIUM CARBONATES
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
BARIUM COMPOUNDS
CALCINATION
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DECOMPOSITION
DICARBOXYLIC ACIDS
DISPERSIONS
DRYING
HIGH TEMPERATURE
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
MIXING
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXALIC ACID
OXYGEN COMPOUNDS
PEROVSKITES
POWDERS
PRECIPITATION
PROCESS SOLUTIONS
PYROLYSIS
RARE EARTH COMPOUNDS
SEPARATION PROCESSES
SOLID SOLUTIONS
SOLUTIONS
STRONTIUM COMPOUNDS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE
ZIRCONIUM COMPOUNDS