期刊
ENERGY TECHNOLOGY
卷 2, 期 5, 页码 480-485出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ente.201300183
关键词
ceramics; ferroelectrics; lead zirconate titanate; piezoelectrics; waste energy harvesting
资金
- Department of Science and Technology (DST) of New Delhi
- Indian National Science Academy (INSA), India under the INSPIRE Faculty Award [(ENG-01)-2011]
The ferroelectric family of materials is employed in a wide variety of applications, ranging from simple sensors, transducers, and actuators to micro-electromechanical systems. The ability of these materials to combine electrical and mechanical responses has led to the establishment of many energy-harvesting and conversion systems. However, the low energy density coupled with high frequency requirements has prevented the successful commercialization of this technology. In this regards, a new approach is presented that is capable of enhanced electro-mechanical energy conversion by utilizing the high-field behavior of ferroelectric materials. A novel cycle has been recommended for continuous energy generation by using the proposed method. The cycle was simulated for the commercially available lead zirconate titanate (PZT) bulk ceramic and a maximum energy density of 526 kJm(-3) per cycle was obtained for a compressive stress of 0-400 MPa and an electric field of 0.2-2.0 kVmm(-1). The energy density obtained by using the presented technique is several hundred times higher than the highest energy density previously reported.
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