Phase structures, loss, storage, damping, voice-absorption, and mechanical properties: nano-carbon black/BWZT/RTV

Composites with damping–absorption performances and storage-loss behaviors were fabricated based on NCB (nano-carbon black), BWZT [Ba (W1/2Cu1/2)O3–Pb0.98Sr0.02 (Mg1/3Nb2/3)0.275(Ni1/3Nb2/3)0.10(Zr0.25Ti0.375)O3] and RTV (room temperature vulcanizing silicone rubber) employing three steps methods of ball-milling, three-roller milling and pressing. The effects of NCB on storage, loss and damping properties of composites were investigated by the method of DMTA and, absorption and mechanical performances are measured by the methods of standing wave tube and TG separately. The micro, chemical and phase structures of composites are characterized by SEM, XRD and IR. The results indicated that both doping of NCB and the combination of BWZT and RTV can be proposed to improve greatly the comprehensive performance of RTV matrixes and, there would be more excellent comprehensive properties in NCB/BWZT/RTV(NBR) with amount of 4–6 wt.% for NCB as d33 of 81 pC/N, storage modulus of 25003 MPa, loss modulus of 398 MPa, damping coefficient of 0.07–0.12, and absorption coefficients of 0.45–0.55 with the difference of frequency in the range of 400–1600 Hz. Lattice growth of BWZT is found showing strong dependences on contents of NCB, the absorption–damping performance.