Dielectric powder compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorsRobert Joseph Bouchard, Lothar Heinrich Brixner
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Abstract
Finely divided dielectric powder compositions having the formula (Sr.sub.x Pb.sub.1-x TiO.sub.3).sub.a (PbMg.sub.0.5 W.sub.0.5 O.sub.3).sub.b wherein x is 0-0.10, a is 0.35-0.5, b is 0.5-0.65, and a plus b equals one, Said compositions having been calcined in air at 750.degree.-900.degree. C. for at least 5 minutes. These powder compositions may be formed into the desired shape and sintered in air at reduced temperatures to produce dielectric bodies of improved properties.
Claims16
A finely divided dielectric powder calcined in air at a temperature in the range 750.degree.-900.degree. C. for at least 5 minutes, the powder having the composition
- (Sr.sub.x Pb.sub.1-x TiO.sub.3).sub.a (PbMg.sub.0.5 W.sub.0.5 O.sub.3).sub.b
- wherein
- x is 0-0.10,
- a is 0.35-0.5,
- b is 0.5-0.65, and
- a plus b equals one,
- substantially all the powder particles being 20 microns or less in largest dimension, said powder being sinterable in air at temperatures in the range 900.degree.-1050.degree. C. to produce bodies having high dielectric constant.
Dependencies are inferred from the claim text.