聚偏氟乙烯在动载荷作用下压电特性的研究

Studies of Piezoelectric Behaviors for PVF2 under Dynamic Loadings

1.
Southwest Institute of Fluid Physics, Chengdu 610003, China;
2.
Institute of Applied Physics, Chengdu University of Science and Technology, Chengdu 610065, China

摘要: 本文利用爆炸激波管研究了聚偏氟乙烯（PVF2）在0.01至1 MPa的冲击波作用下的压电特性。实验发现，大约在0.25 MPa附近，压电灵敏度出现急剧下降，然后很快趋于稳定。本文还利用X射线衍射仪观察了冲击载荷下PVF2的晶型变化，X射线衍射结果表明，PVF2在3~4 MPa的冲击波几十次反复作用下晶型不发生明显改变。
- 压电特性 /
- 爆炸激波管 /
- 晶型
Abstract: The piezoelectric behaviors of PVF2 (polyvinylidene fluoride) under dynamic loadings (0.01~4 MPa) are studied by means of explosion shock tube. It is found in the experiments that the piezoelectric sensitivity abruptly decreases for the loading pressures larger than 0.25 MPa, and approaches a constant. The crystalline feature of PVF2 under dynamic loadings were observed with a X-ray diffractometer. The results show that it is not obviously changed even undergoing shock loadings of 3~4 MPa for many times.
- piezoelectricity /
- shock tube /
- crystalline feature