Very high dielectric strength for dielectric elastomer actuators in liquid dielectric immersion

Thanh Giang La, Gih Keong Lau

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

This letter reported that a dielectric elastomer actuator (3M VHB), which is immersed in a liquid dielectric bath, is enhanced tremendously in dielectric strength up to 800 MV/m, as compared to 450 MV/m for the actuator operated in air. The bath consists of silicone oil (Dow Corning Fluid 200 50cSt), which is 6.5 times more thermally conductive than air, and it is found able to maintain the actuator at a stable temperature. As a result, the oil-immersed dielectric elastomer actuator is prevented from local thermal runaway, which causes loss of electrical insulation, and consequently avoids the damage by electromechanical instability.

Original languageEnglish
Article number192905
JournalApplied Physics Letters
Volume102
Issue number19
DOIs
StatePublished - 13 May 2013

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