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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Lu, Sheng-guo Furman, E. Zhang, Q. M. Chu, Baojin Wang, Yong Neese, Bret |
| Description | Author Affiliation: Neese B ( Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA.) |
| Abstract | Applying an electrical field to a polar polymer may induce a large change in the dipolar ordering, and if the associated entropy changes are large, they can be explored in cooling applications. With the use of the Maxwell relation between the pyroelectric coefficient and the electrocaloric effect (ECE), it was determined that a large ECE can be realized in the ferroelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer at temperatures above the ferroelectric-paraelectric transition (above 70 degrees C), where an isothermal entropy change of more than 55 joules per kilogram per kelvin degree and adiabatic temperature change of more than 12 degrees C were observed. We further showed that a similar level of ECE near room temperature can be achieved by working with the relaxor ferroelectric polymer of P(VDF-TrFE-chlorofluoroethylene). |
| ISSN | 00368075 |
| Issue Number | 5890 |
| Journal | Science |
| Volume Number | 321 |
| e-ISSN | 10959203 |
| Language | English |
| Publisher | American Association for the Advancement of Science (United States) |
| Publisher Date | 2008-08-08 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | History and Philosophy of Science |
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