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Grain size variation as a function of the Mn concentration for the one and two step sintering. A smaller grain size with higher density was obtained for the two step sintering.
Variation of the piezoelectric properties as a function of the Mn concentration for two types of sintering profiles (a) piezoelectric stress constant and (b) dielectric constant, .
Variation of the constant with the piezoelectric voltage constant, , for different Mn concentration in the ceramic of base composition fabricated by two different sintering profiles. The magnitude of and was computed using the data shown in Fig. 2. It should be noted that the data exhibits logarithmic variation as predicted by the Eq. (7).
Comparison of the magnitude of product as a function of for the material developed in this study with commercially available ceramics. The material denoted as UTA represents Mn and has the properties , , and . The data for other compositions are listed in Ref. 8.
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