Study On Piezoelectric Damping Bromobutyl Rubber

This article studies one kind of new damping compound material, It is consisted of bromobutyl rubber, piezoelectric ceramic powder (PZT) and acetylene black. Except for traditional damping mechanism of Bromobutyl rubber, mechanical vibration energy can be changed into electric induced by piezoelectric ceramic's piezoelectric effect, and then the energy can be dissipated in form of Joule's heat through conductive micro-circuit formed by conditive fillers in the system. It is particular investigated on damping mechanism of the composites and the influence of proportion and technics on the performance is analyzed.The research discovers: Along with carbon black quality points enhancement, compound system damping (tan δ) increase, but works as when the carbon black quality number of copies is 8%, damping (tan δ) achieves the peak value, continues to increase its content, can cause damping (tan δ) drop; Along with compound material in PZT piezoelectricity ceramics powder content increase, compound material damping performance increase; Along with polarized temperature elevate, the compound material piezoelectricity performance enhances, the damping performance increases. The polarized electric field increases, the compound material piezoelectric modulus increases, the damping performance enhances, but after electric-field intensity surpasses certain limit, the electric constant tends to constantly. In the polarized initial period, the electric constant but rapidly increases along with the polarized time increase, after the polarized certain time, the electric constant tends to steadily.