Title:
RHOMBOHEDRAL-PHASE BARIUM TITANATE AS A PIEZOELECTRIC TRANSDUCER
Document Type and Number:
WIPO Patent Application WO2001069696
Kind Code:
A3
Abstract:
A piezoelectric transducer includes a barium-titanate-based piezoelectric material having a poled, rhombohedral structure. The rhombohedral barium titanate structure can include a dopant, such as KNbO3, BaHfO3, BaSnO3, BaZrO3 or KTaO3. The piezoelectric transducer can be used either as an actuator or as a sensor.
Inventors:
AVRAHAMI YTSHAK
TULLER HARRY L
TULLER HARRY L
Application Number:
PCT/US2001/006744
Publication Date:
June 13, 2002
Filing Date:
March 02, 2001
Export Citation:
Assignee:
MASSACHUSETTS INST TECHNOLOGY (US)
International Classes:
H01L41/187; (IPC1-7): H01L41/187; H01L41/09; H01L41/113; H01L41/24
Foreign References:
| US2708243A | 1955-05-10 | |||
| GB1241974A | 1971-08-11 |
Other References:
REHRIG P W ET AL: "Piezoelectric properties of zirconium-doped barium titanate single crystals grown by templated grain growth", JOURNAL OF APPLIED PHYSICS, vol. 86, no. 3, 1 August 1999 (1999-08-01), pages 1657 - 1661, XP000880216, ISSN: 0021-8979
JAFFE B ET AL: "Piezoelectric ceramics", 1971, ACADEMIC PRESS, LONDON, XP002182371, 16800
TAWFIK A ET AL: "Temperature dependence of electromechanical properties and strain in barium titanate hafnate transducers", JOURNAL OF MATERIALS SCIENCE LETTERS, vol. 5, no. 3, March 1986 (1986-03-01), pages 305 - 306, XP002182307, ISSN: 0261-8028
LEMANOV V V ET AL: "Phase transitions in BaTiO3-KTaO3 solid solutions", PHYSICS OF THE SOLID STATE, vol. 37, no. 6, June 1995 (1995-06-01), ISSN: 1063-7834, pages 1010 - 1013, XP002182385
JAFFE B ET AL: "Piezoelectric ceramics", 1971, ACADEMIC PRESS, LONDON, XP002182371, 16800
TAWFIK A ET AL: "Temperature dependence of electromechanical properties and strain in barium titanate hafnate transducers", JOURNAL OF MATERIALS SCIENCE LETTERS, vol. 5, no. 3, March 1986 (1986-03-01), pages 305 - 306, XP002182307, ISSN: 0261-8028
LEMANOV V V ET AL: "Phase transitions in BaTiO3-KTaO3 solid solutions", PHYSICS OF THE SOLID STATE, vol. 37, no. 6, June 1995 (1995-06-01), ISSN: 1063-7834, pages 1010 - 1013, XP002182385
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