Piezoelectric ceramic materials based on lead zirconate titanate (PZT) having the crystal structure perovskite
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United States of America Patent
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Jun 17, 2008
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Sep 20, 2002
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Sep 29, 2001
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Abstract
The invention relates to piezoelectric ceramic materials based on the system Pb(Zr,Ti)O.sub.3, i.e. solid solutions of lead zirconate PbTO.sub.3, characterized by having very good dielectric and electromechanical properties that can be adopted for different uses by modifying the composition. The piezoelectric ceramic materials based on the system Pb(Zr,Ti)O.sub.3 are modified in order to obtain a high level of piezoelectric activity. The invention provides piezoelectric ceramic materials based on lead zirconate titanate (PZT) having the crystal structure of perovskite with formula A.sup.2+B.sup.4+O.sub.3.sup.2-, which are characterized by a substitution of heterovalent acceptor and donator ions at Zr/Ti sites.
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