Electric-field-inducible deformable material
AssigneeNGK Insulators, Ltd.
InventorsHirofumi Yamaguchi, Toshikatsu Kashiwaya
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Abstract
An electric-field-inducible deformable porcelain material is provided, comprising a main component BaTiO3, with 0.05 to 2 wt % of at least one selected from Mn, Cu and Co in terms of a metal added thereto. The crystal phase in the porcelain is a single perovskite phase, and the value of the transversal electric-field-inducible deformation is 300×10−6 or more in the field strength of 2000 V/mm. It is presumed that the amount of the rotating 90° domain becomes greater, and the electric-field-induced deformation due to this is increased. Thus, a sufficient displacement amount as a piezoelectric material is obtained.
Claims1
An electric-field-inducible deformable material having a transversal electric-field-inducible deformation value of 300×10−6 or more in a field strength of 2000 V/mm, said material comprising a porcelain having a main component of BaTiO3 and 0.05 to 2 wt % of at least one metal selected from the group consisting of Mn, Cu and Co, wherein the Ba/Ti ratio is in a range of 1/0.92 to 1/0.998, said porcelain comprises only one crystal phase of perovskite structure, and Ba is substituted by Sr.
Dependencies are inferred from the claim text.