High‐Temperature BiScO₃‐PbTiO₃ Piezoelectric Vibration Energy Harvester

Abstract

Conventionally, effective mechanical vibration energy harvesting is based on (Pb,Zr)TiO3 (PZT) ceramics, poly(vinylidene fluoride) (PVDF) polymers or PVDF/PZT or other piezoelectric composite materials, and their working temperature is normally limited to room temperature (R‐T) or below 150 °C. Here, bismuth scandium lead titanate (BiScO3‐PbTiO3, abbreviated as BSPT) ceramic is reported which has a high Curie temperature point around 450 °C and its application for high‐temperature (H‐T) vibration energy harvesting. Experimental results show that it exhibits an excellent H‐T piezoelectricity, converting mechanical vibration energy into electric power effectively in a wide temperature range from R‐T till 250 °C. This research shows the BSPT piezoelectric energy harvester having the potential application for self‐power source of wireless sensor network system in high temperature circumstance.

Simultaneously Achieving Large Piezoelectricity and Low Dielectric Loss in High-Temperature BiScO3–PbTiO3-Based Ceramics

“…Figure b provides a comparison of the k p values between BS-PT-0.125Nb ceramics and the reported BS-PT-based ceramics. It can be found that BS-PT-0.125Nb ceramics in this study have k p values of ∼0.63 at room temperature and 0.72 at 400 °C, which are superior to those in previous studies. ,,,− Figure c shows d 33 and d 31 (calculated by the impedance resonance method) of BS-PT-0.125Nb ceramics as a function of the temperature. The values of d 33 and d 31 of BS-PT-0.125Nb ceramics at room temperature are 407 and −207 pC/N, respectively.…”

Significantly Enhanced Energy-Harvesting Performance and Superior Fatigue-Resistant Behavior in [001]c-Textured BaTiO3-Based Lead-Free Piezoceramics

“…Table compares the power-generation characteristics of various representative piezoelectric energy harvesters. In combination with Figure d, it should be emphasized that our textured BCTZ presents ultrahigh power densities, which significantly outperform previously reported lead-free bulk/composite-structured energy harvesters using BNT-, KNN-, and BT-based piezoelectric systems − , and are even better than many lead-based (e.g., PT and PZT) energy harvesters. ,− Moreover, this is the first report that demonstrates ultrahigh power generation performance in a [001] c grain-oriented microstructure with low-ε microcrystals included.…”

“…Meanwhile, the utilization of low-ε 33 T /ε 0 (∼168 along [001]) BT single-crystal templates effectively suppressed the dielectric permittivity of textured BCTZ ceramics owing to the elastoelectric composite effect, yielding ∼2.8 times enhancement in g 33 value. To the best of our knowledge, the d 33 · g 33 and FOM off values achieved here are superior to those ever reported for compositionally modified BT-based ceramics. − ,, Moreover, they are much higher than most previously reported BNT- and KNN-based ceramics, ,,,,− and even outperform many commercial soft PZT- and PbTiO 3 (PT)-based ceramics. − Hence, textured BCTZ is an excellent lead-free candidate for energy-harvesting applications.…”

Composition driven (Ba,Ca)(Zr,Ti)O 3 lead‐free ceramics with large quality factor and energy harvesting characteristics

“…PZT-5A 63 24.9 9.3 4.6 95 BS-PT (PT-based) 64 Bold characters highlight the results explored in this study.…”