Dear Md. Asaduzzaman Jabin,

I suggest you see the links on the topic.

https://www.sciencedirect.com/topics/engineering/dielectric-elastomer

https://www.intechopen.com/chapters/60131

https://www.nature.com/articles/s41427-019-0147-5

Article Dielectric elastomer actuators

Best regards

I appreciate your expertise. Thanks Dr. Mohamed-Mourad Lafifi

Hi Md. Asaduzzaman Jabin,

In general, your DEA dielectric material has a major impact on DEA performance and needs to have high compliance, relative dielectric permittivity, and breakdown/dielectric strength. DEA electrode also needs to be compliant, sufficiently stretchable, and sufficiently conductive, so they do not compromise DEA performance.

Also, it depends on what exactly you mean by "effective DEA actuator", e.g., producing large strain or large actuation force, actuating at low voltage (as you mention), or any combination of those performance characteristics. You can refer to these papers where we quantified different combinations of dielectric material properties for different DEA performance criteria:

Article Effects of Ferroelectric Fillers on Composite Dielectric Ela...

https://www.frontiersin.org/articles/10.3389/frobt.2022.1034914/full

https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12042/120420W/Additively-manufactured-unimorph-dielectric-elastomer-actuators-with-ferroelectric-particles-for/10.1117/12.2613128.short?SSO=1

Briefly, if you want to lower driving voltage, you can:

- reduce the dielectric thickness to reach a larger electric field at a lower voltage (but you are closer to electromechanical instability). Also, thinner films can typically withstand higher electric fields.

- select or prepare dielectric material that sacrifices some dielectric strength but has a higher dielectric permittivity (and potentially lower stiffness). This is a typical trade-off when using particulate dielectric composites for DEA. With a good material, DEA can reach same or better performance at lower voltage.