共聚物P(VDF-TrFE)在高压下的电学性质与相变

1.
中国科学院物理研究所，北京 100080；
2.
中国科学院国际材料物理中心，辽宁沈阳 110015；
3.
Department of Physics and Electronics, University of Puerto Rico, Humacao PR 00791, USA;
4.
Department of Physics, Montana State University, Bozeman MT 59717, USA

Electrical Properties and Phase Transitions in P(VDF-TrFE) (80/20 mol%) at High Pressure Using a DAC

1.
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
2.
International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015, China;
3.
Department of Physics and Electronics, University of Puerto Rico, Humacao PR 00791, USA;
4.
Department of Physics, Montana State University, Bozeman MT 59717, USA

摘要: 研究了共聚物P（VDF-TrFE）（物质的量分数分别为80%、20%）在室温下、14 GPa内的电容、电阻与压力的关系。实验结果表明，它在14 GPa内存在两个相交：第一个相变发生在1.1 GPa左右；而第二个相变发生在5～6 GPa左右。
- 共聚物 /
- 相变 /
- 电容测量
Abstract: Capacitance-pressure (C-p) and resistance-pressure (R-p) relationships for the ferroelectric eopolymer poly (vinylidenefluoride/trifluoroethylene), P(VDF-TrFE) (80/20 mol%) at room temperature up to 14 GPa were investigated in a diamond anvil cell (DAC) using capacitance and resistance measurements. These results indicate that P(VDF-TrFE) with 80 mol% VDF undergoes two phase transitions below 14 GPa. The first apparent transition occurs near 1.1 GPa and the second apparent transition which is more sharply defined occur in the 5 to 6 GPa range.
- copolymer /
- phase transition /
- capacitance measurement