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Quantitative analysis of damping enhancement and piezoelectric effect mechanism of CNTs / PMN / EP Composites

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Document pages: 7 pages

Abstract: New piezoelectric damping materials were developed, including carbon nanotube (CNT) lead magnesium niobate (PMN) epoxy resin (EP). Tan   selection δ The area (TA) analysis method is used to evaluate the damping performance, which clearly clarifies the influence of the maximum loss factor (tan) δ) And the effect of effective temperature range on damping performance. In addition, the dominant factors of damping enhancement are quantitatively analyzed by TA value. Compared with PMN, when the content of carbon nanotubes is less than 0.6, the interfacial friction is the main factor   weight percentage. The maximum damping rate of carbon nanotubes is 29.14 . With the increase of carbon nanotube content, carbon nanotubes gradually form a loop, and the electric energy generated by PMN piezoelectric effect is effectively dissipated through capacitorsctive network. Thus, PMN becomes the dominant factor as the content of CNTs exceeds 0.8 wt. , and the damping percentage reaches 47.43 at the content of CNTs of 1.0 wt. .

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