Patent ID: 8357314

Claim:
A dielectric elastomer composition comprising an elastomer and, (A) carbon black and (B) at least one powder selected from among magnesium hydroxide powder and dielectric ceramic powder in admixture with said elastomer, wherein an average particle diameter of said carbon black is 50 to 200 nm, and 5 to 25 parts by weight thereof is in admixture with 100 parts by weight of said elastomer; in said magnesium hydroxide powder, a content of ferric oxide is not more than 0.02 wt % and in at least one measuring condition selected from among measuring condition (1) in which a frequency is 400 MHz and a temperature is 30° C. and measuring condition (2) in which a frequency is 5 GHz and a temperature is 25° C., a dielectric constant of said dielectric elastomer composition is not less than 3, and a dielectric dissipation factor thereof is not more than 0.006.