Material design to obtain excellent energy-conversion coefficient and Curie temperature in piezoelectric ceramics

초록

A high energy conversion constant (d(33)xg(33)) is required to harvest the wasted mechanical energy into electric energy, and a good mechanical quality factor (Q(m)) and high Curie temperature (T-C) are required to ensure durability. Here, we present a generalized rule to design a material in Pb(Zr,Ti)O-3 (PZT)-based ceramics for energy harvesting. In particular, the energy-harvesting performances was investigated in phase diagram. Consequently, the designed materials not only exhibited excellent piezoelectric properties, with k(p) of 0.69, Q(m) of 1560, and d(33) of 393 pC N-1, but also achieved an energy-harvesting property (d(33)xg(33)) of 13.3 x 10(-12) m(2) N-1. In addition, T-C was high, approximately 295 degrees C. Furthermore, the sintering temperature of the developed material was lowered to 950 degrees C, which can reduce the manufacturing costs. Therefore, it might be suggested that this material could be recognized as one of the promising candidates for the energy harvesting materials. In addition, the design rules were validated to be useful in the design of new materials for energy harvesting.

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