New type of mechanical damping composites composed of piezoelectric ceramics,carbon black and epoxy resin |
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| Affiliation: | 1. CCI corporation, 12 Shinhazama, Seki, Gifu 501-3923, Japan;2. Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu 501-1193, Japan;1. Department of Chemistry, Faculty of Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran;2. Department of Chemistry, Latrobe University, Bundoora 3086, Victoria, Australia;3. Dipartimento di Chimica Inorganica, Vill. S. Agata, Salita Sperone 31, Università di Messina, 98166 Messina, Italy;4. Faculty of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran;1. Department of Mechanical Engineering, KPR Institute of Engineering and Technology, Coimbatore 641407, India;2. Department of Mechanical Engineering, Park College of Engineering and Technology, Coimbatore 641407, India;3. Department of Agriculture Engineering, Sri Shakthi Institute of Engineering and Technology, Coimbatore 641062, India |
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| Abstract: | New types of piezoelectric damping materials, piezoelectric ceramic (PZT) powder/carbon black (CB) powder/epoxy (EP) resin composites, were developed, and their mechanical and damping properties were studied. Here the mechanical energy of vibrations and noises were transformed into electric energy (current) by PZT, and the electric current was conducted to an external circuit through CB powders and then dissipated as thermal energy through a resistor. When CB was added to PZT/EP (70/30 in wt%), the mechanical loss factor (η), a measure of mechanical of damping intensity, showed a maximum value of ～0.08 at the CB content of ～0.51 wt%, at which the CB particles electrically just contact each other. In the present work, it was found that the PZT/CB/EP composite of 90.0/0.5/9.5 shows a large η value of ～0.15. |
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