The strain layer is composed of a high dielectric constant material. 應變層是由一個高介電常數的材質所構成。
The permittivity of polymer was more important to actuation performance and high permittivity could improve strain more. 聚合物相的介電常數對驅動應變影響最大，採用高介電常數的聚合物相可以使其驅動應變明顯提高。
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