Title:
PIEZOELECTRIC CERAMIC MATERIALS BASED ON LEAD ZIRCONATE TITANATE (PZT) HAVING THE CRYSTAL STRUCTURE OF PEROVSKITE
Document Type and Number:
WIPO Patent Application WO2003029162
Kind Code:
A3
Abstract:
The invention relates to piezoelectric ceramic materials based on the system Pb(Zr,Ti)O3, i.e. solid solutions of lead zirconate PbTiO3, characterized by having very good dielectric and electromechanical properties that can be adapted for different uses by modifying the composition. The piezoelectric ceramic materials based on the system Pb(Zr,Ti)O3 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<2+>B<4+>O32->, which are characterized by a substitution of heterovalent acceptor and donator ions at Zr/Ti sites.
Inventors:
HELKE GUENTER (DE)
Application Number:
PCT/DE2002/003528
Publication Date:
October 30, 2003
Filing Date:
September 20, 2002
Export Citation:
Assignee:
CERAMTEC AG (DE)
HELKE GUENTER (DE)
HELKE GUENTER (DE)
International Classes:
C04B35/493; H01L41/187; C04B35/49; (IPC1-7): H01L41/187; C04B35/493
Foreign References:
| DE10024823A1 | 2001-06-07 | |||
| US5378382A | 1995-01-03 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 02 29 February 1996 (1996-02-29)
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 04 30 April 1999 (1999-04-30)
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 04 30 April 1999 (1999-04-30)
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