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J. Am. Ceram. Soc., 80 [5] 107378 (1997) Scaling Analysis for the Axial Displacement and Pressure of
 

Summary: J. Am. Ceram. Soc., 80 [5] 107378 (1997)
Scaling Analysis for the Axial Displacement and Pressure of
Flextensional Transducers
Wan Y. Shih,,
Wei-Heng Shih,*,
and Ilhan A. Aksay*,
Department of Chemical Engineering and Princeton Materials Institute, Princeton University,
Princeton, New Jersey 085445263
Department of Materials Engineering, Drexel University, Philadelphia, Pennsylvania 191042875
We have examined the axial displacement, h, and maxi- varying the thickness of the metal end cap and/or the diameter
mum axial pressure, Pmax, of flextensional transducers such of the piezoelectric disk, axial displacements as high as 8% of
as the moonies and the rainbows with both scaling and the thickness of the metal end cap have been achieved at the
mechanical analyses. For a constant electric field E across center of the metal end cap.3
The rainbow is an oxide piezoelec-
the transducer, h/t E/t2
where t is the thickness of the tric disk such as lead-lanthanum-zirconate-titanate (PLZT) with
rainbow or the thickness of the metal end cap of the moonie one of the two faces of the disk reduced. The cross-section view
and h/t, the relative axial displacement. Thus, for a con- of a rainbow is schematically shown in Fig. 1(b).2
An axial dis-
stant voltage V across the transducer, h/t V/t3

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science