Title :
EMFi-New electret material for sensors and actuators
Author :
Lekkala, Jukka ; Paajanen, Mika
Author_Institution :
VTT Chem. Technol., Tampere, Finland
Abstract :
ElectroMechanical Film (EMFi) is a new electret material with a cellular structure. EMFi´s advantage over other solid polymer electrets is based on its flexibility due to the voided internal structure combined with strong permanent charge, which makes EMFi very sensitive to dynamic forces exerted normal to its surface. The base material is low-priced polypropylene (PP). Structure, operation and characterisation of the EMFi material is described. EMFi, which can be applied in various sensors, switches, loudspeakers and special transducers, is patented world wide
Keywords :
ageing; electrets; electric sensing devices; piezoelectric actuators; thermally stimulated currents; EMFi; ElectroMechanical Film; actuators; cellular structure; characterisation; dynamic forces; electret material; operation; polypropylene; sensors; solid polymer electrets; strong permanent charge; structure; voided internal structure; Actuators; Biological materials; Chemical sensors; Corona; Electrets; Electrodes; Electromechanical sensors; Manufacturing processes; Permittivity; Voltage;
Conference_Titel :
Electrets, 1999. ISE 10. Proceedings. 10th International Symposium on
Conference_Location :
Athens
Print_ISBN :
0-7803-5025-1
DOI :
10.1109/ISE.1999.832151
