Journal
SENSORS AND ACTUATORS A-PHYSICAL
Volume 135, Issue 2, Pages 587-592Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2006.10.019
Keywords
carbon black; piezoresistivity; conductive polymer composite; flexible force sensor
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In order to study quantitatively the piezoresistive characteristics of carbon black filled silicone rubber composite, which is the sensitive element of flexible force sensor, the composite samples with the mass ratio of carbon black to silicone rubber ranging from 0.10 to 0.14 were prepared and measured. Experimental results indicate that there exits a critical pressure which varies with the carbon black content. Based on the shell structure theory, the experimental phenomena are explained from the view that external pressure induces the formation and destruction of effective conductive paths, leading to the changes in the resistance of composite. (c) 2006 Elsevier B.V. All rights reserved.
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