Relaxor ferroelectric compositions for field induced ultrasonic

Details Relaxor ferroelectric compositions for field induced ultrasonic Relaxor ferroelectric compositions for field induced ultrasonic

1996-06-14

1998-06-02

Bonner, Melissa

Compositions

Piezoelectric

501135, 501136, 310113, C04B 35495, C04B 35472, H02K 4704

Patent

active

057594325

ABSTRACT:
A relaxor ferroelectric composition that has the components lead magnesium niobate, lead titanate, and lead magnesium tungstate. The components are preferably present in relative molar amounts of (1-x-y) lead magnesium niobate, (x) lead titanate, and (y) lead magnesium tungstate, where 0.11.ltoreq.x.ltoreq.0.13 and 0.01.ltoreq.y.ltoreq.0.03. Also disclosed is a tunable ultrasonic transducer made of a relaxor ferroelectric composition that has the components lead magnesium niobate, lead titanate, and lead magnesium tunstate. A method of making a relaxor ferroelectric material comprising the step of adding an effective amount of lead magnesium tungstate to a lead magnesium niobate-lead titanate composition is also disclosed.

REFERENCES:
patent: 5345139 (1994-09-01), Gururaja et al.
patent: 5378382 (1995-01-01), Nishimura et al.
patent: 5438554 (1995-08-01), Seyed-Bolorforosh et al.

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