The strain layer is composed of a high dielectric constant material. 应变层是由一个高介电常数的材质所构成。
The permittivity of polymer was more important to actuation performance and high permittivity could improve strain more. 聚合物相的介电常数对驱动应变影响最大,采用高介电常数的聚合物相可以使其驱动应变明显提高。