Title :
Equations of state including the thermal domain of piezoelectric and pyroelectric heterogeneous bimorphs
Author :
Smits, Jan G. ; Choi, Wai-shing
Author_Institution :
Dept. of Electr. Eng., Boston Univ., MA, USA
Abstract :
The equations of state for piezoelectric bimorphs made of a piezoelectric and a nonpiezoelectric material are determined. As these bimorphs are nonsymmetric they suffer from considerable temperature sensitivity due to the difference in thermal expansion coefficients of the constituting materials. The deflection, rotation, volume displacement, charge on the electrodes, and entropy change are calculated for the heterogeneous bimorph
Keywords :
entropy of substances; equations of state of solids; piezoelectric devices; piezoelectric materials; pyroelectric devices; pyroelectricity; thermal expansion; deflection; electrode charge; entropy change; equations of state; piezoelectric bimorphs; pyroelectric heterogeneous bimorphs; rotation; temperature sensitivity; thermal domain; thermal expansion coefficients; volume displacement; Ceramics; Dielectric materials; Electrodes; Entropy; Equations; Piezoelectric materials; Pyroelectricity; Temperature dependence; Temperature sensors; Thermal expansion;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.276020
