93 resources related to Polymer foams
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2014 IEEE 15th International Symposium on Electrets ISE 15
Electrets and related phenomena continue to receive much interest both from the fundamentaland applied points of views. Charge storage in insulators is crucial for many applications, involves a wide range of materials (organic, inorganic, hybrid, powder, thin & thick films, bulk, porous, …) and, hence, is at the frontier of many scientific domains.The ISE is therefore a unique meeting opportunity for scientists and engineers from all over the world working in the field of electrical engineering, materials science and engineering, condensed matter physics and chemistry, and a chance for communicating about recent advances and research and development efforts in these areas. It also provides a forum for in-depth discussions between the most experienced and established scientists and engineers and young researchers.
2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena - (CEIDP 2014)
Topics of interest to the Conference include: Aging, Bio-dielectrics, Charge storage and transport, Electro-hydrodynamics, Flow electrification, High-field effects, High frequency dielectric phenomena, Measurement techniques, Nano-dielectrics, Outdoor insulation, Partial discharge measurements, Polarization phenomena, Pre-breakdown and breakdown in solids, liquids, gases, and vacuum, Surface flashover, Treeing, and Cryogenic dielectrics
This conference is directed towards those who develop, test or use electrical insulation in electrical equipment.
To provide a forum for in-depth investigations and interdisciplinary discussions involving design, modeling, testing, micromachining, microfabrication, integration and packaging of structures, devices and systems.
2010 International Conference on E-Product E-Service and E-Entertainment (ICEEE 2010)
ICEEE is a distinguished forum for advances in research and technologies that drive innovation in E-Product, E-Service and E-Entertainment and their applications. At ICEEE, academics and practitioners gather to discuss challenges and achievements from diverse perspectives, in a comfortable and effective single track conference format.
Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control was the number-three journal in acoustics in 2002, according to the annual Journal Citation Report (2002 edition) published by the Institute for Scientific Information. This publication focuses on the theory, design, and application on generation, transmission, and detection of bulk and surface mechanical waves; fundamental studies in physical acoustics; design of sonic ...
Bauer, S.; Bauer-Gogonea, S.; Camacho-Gonzales, F.; Dansachmuller, M.; Graz, I.; Kaltenbrunner, M.; Leonhartsberger, J.G.; Schwodiauer, R. Electrets, 2005. ISE-12. 2005 12th International Symposium on, 2005
Cellular space-charge polymer electrets can be internally charged by silent or partial discharges ("microstorms") within the voids of the polymer foam. The resulting material, which carries positive and negative charges on the internal void surfaces is called a ferroelectret. Ferroelectrets behave like typical ferroelectrics, hence they provide a novel class of ferroic materials. The soft foams are strongly piezoelectric, and ...
Hillenbrand, J.; Sessler, G.M. Dielectrics and Electrical Insulation, IEEE Transactions on, 2004
Piezoelectric properties of polymer electrets consisting of cellular polypropylene (PP) or of porous polytetrafluoroethylene (PTFE) with thicknesses of 50 to 100 μm are studied. In addition, bilayer or multilayer structures composed of one of these polymers in solid or voided form plus an additional air layer are investigated. In particular, the quasistatic and the dynamic piezoelectric d33 coefficients are determined ...
Zhang, X.; Wang, X.; Cao, G.; Pan, D.; Xia, Z. Properties and Applications of Dielectric Materials, 2009. ICPADM 2009. IEEE 9th International Conference on the, 2009
Polytetrafluoroethylene (PTFE) films with a void structure are prepared by the sintering process. Such void PTFE films are piezoelectric after proper corona charging. The quasi-static piezoelectric d33 coefficients up to 250 pC/N are obtained. Pre-ageing treatment is an effective method to further improve the thermal stability. For the samples with pre-ageing treatment, the the d33 coefficients are very stable when ...
Pometcu, L.; Sharaiha, A.; Benzerga, R.; Pouliguen, P. Antennas and Propagation Conference (LAPC), 2014 Loughborough, 2014
This paper presents a topology for improving the performance of straight wedge absorbing materials at oblique angles of incidence. The optimization process is based on a genetic algorithm and allows one to obtain a low reflection coefficient within a wide band of frequencies. We investigate the performance by comparison between the straight wedge absorber and the optimized wedge absorber. These ...
Chubrikov, A. Strategic Technology, 2007. IFOST 2007. International Forum on, 2007
At the present stage of development of Kuzbass coal-mining industry the tasks of coal production increase and coal-mining safety increase are of top priority. Use of polymer materials is one of the directions of efficiency and safety increase of coal-mining works. The positive experience of polymer materials use at the coal-mines of Kuzbass proved the importance of polymer technologies in ...
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