Electrostrictive ultrasonic probe having expanded operating temp

Details Electrostrictive ultrasonic probe having expanded operating temp Electrostrictive ultrasonic probe having expanded operating temp

1993-08-27

1994-09-06

Stephan, Steven L.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310346, 252 629, H01L 4187, C04B 3546

Patent

active

053451392

ABSTRACT:
An ultrasonic electrostrictive transducer for transmitting and receiving ultrasonic energy and having an expanded operating temperature range, preferably about room temperature. The transducers may be made from PMN-PT solid solutions having select mole percentages of PT and being doped with La, whereby the operating temperature range about a given operating temperature may be effectively doubled.

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patent: 5188992 (1993-02-01), Nishimura et al.
patent: 5210455 (1993-05-01), Takeuchi et al.
patent: 5219810 (1993-06-01), Furuya et al.
"Electrostrictive Materials For Ultrasonic Probes," Masuzawa et al., Japanese Journal of Applied Physics, vol. 28, (1989) Supplement 28-2, pp. 101-104.
"Dielectric And Piezoelectric Properties Of Lanthanum-Modified Lead Magnesium Niobium-Lead Titanate Ceramics," Huebner et al., Ferroelectrics, 1989, vol. 93, pp. 341-349.
"Relaxor Ferroelectric Transducers," Takeuchi et al., Central Research Laboratory, Hitachi, Ltd., Kokubunju, Tokyo 185, Japan.

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