Improvement of Temperature Dependence of Piezoelectric Elements (<Special Issue> FERROELECTRIC MATERIALS AND THEIR APPLICATIONS)

概要

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The relationships between the equivalent circuit constants of a piezoelectric element and the piezoelectric d_<33-> and g_<33->constants were first clarified. The temperature dependence of the composed equivalent circuit constants was then decreased by connecting the piezoelectric element to a temperature-compensating capacitor, either in series or in parallel. Furthermore, new sandwich-like piezoelectric elements consisting of stacked piezoelectric ceramic and dielectric ceramic layers were constructed to decrease the dependence on temperature. The piezoelectric d_<33->constant of Pb(Zr, Ti)O_3 changed by about 15% over the temperature range of 0 to 160℃. The new sandwich-like element, however, exhibited a change of less than 3% over the same temperature range.
社団法人応用物理学会の論文
1994-09-30