Pyroelectric ceramic composition and multilayered structure therefrom
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United States of America Patent
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Jul 16, 1991
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N/A
app pub date -
Jul 12, 1990
filing date -
Mar 24, 1989
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Abstract
A pyroelectric ceramic composition of the general formula: PbZr.sub.X (Zn.sub.1/3 Nb.sub.2/3).sub.Y Ti.sub.Z O.sub.3 wherein X+Y+Z=1 is provided having both of high pyroelectric constant and the second transition temperature below its Curie's temperature. Further, there is provided a multilayered pyroelectric structure comprising a stack of a plurality of layers, each of which has the different composition each to other, of the general formula: PbZr.sub.X (Zn.sub.1/3 Nb.sub.2/3).sub.Y Ti.sub.Z O.sub.3 wherein X+Y+Z=1, where the value of Z is different from each other in the different layers.
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