Methods for preparing lead lanthanum zirconatetitanate powders w

Details Methods for preparing lead lanthanum zirconatetitanate powders w Methods for preparing lead lanthanum zirconatetitanate powders w

1990-04-11

1990-10-23

Morris, Theodore

Chemistry of inorganic compounds

Rare earth compound

423265, 423598, 423608, 252 629, 501152, 501134, C01F 1700

Patent

active

049650564

ABSTRACT:
A method of preparing PLZT powder with a carbonate process employing Pb(NO.sub.3).sub.2, zirconium oxychloride and chlorides of La and Ti as starting materials. Solutions of each are blended together and added to a solution consisting of NH.sub.4 OH and (NH.sub.4).sub.2 CO.sub.3. The resulting solution undergoes refluxing at proper conditions for a period of time to coprecipitate a majority of particles which form nuclei covered by the carbonates of La, Ti and Pb, and a minority of particles which form nuclei which are covered by the hydroxides of La, Ti and Pb, which are calcined and ground to form PLZT powder.

REFERENCES:
patent: 3510254 (1970-05-01), Beii
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patent: 3923675 (1975-12-01), Mazdiyasni et al.
patent: 4061583 (1977-12-01), Murata et al.
patent: 4696810 (1987-09-01), Shirasaki et al.

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