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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Mater Sci Eng R Rep. 2015 Mar 1;89:1–48. doi: 10.1016/j.mser.2015.01.002

Figure 42.

Figure 42

(a) Schematic phase diagram of PZT ceramic. (b) Composition versus various electrophysical parameters for PZT ceramics in the vicinity of MPB, where εT is the free permittivity; d is piezoelectric strain constant; k is electromechanical coupling factor; g is piezoelectric voltage constant; γp is pyroelectric constant; Q is mechanical quality factor; QT is mechanical quality factor under non-zero stress; k2QT is piezoelectric quality; εTk2QT is power density of the piezoelectric transformer; Δfr/Δf is relative change of the resonance frequency. Adapted from Refs. [267–268].