Title:
ELECTROSTRICTIVE ACTUATOR
Document Type and Number:
Japanese Patent JPS6454786
Kind Code:
A
Abstract:
PURPOSE:To reduce the deterioration in characteristics even at a high speed driving and high repetition by providing a magnetic field generator operating in the polarizing direction of a piezoelectric material having a predetermined composition and forming an electrode at the material. CONSTITUTION:A piezoelectric material is made of a composition (Pb1-xYbx)(Zr1-yTiy)O3, [where x=0.008-0.094, y=0.46-0.48]. The material 1 and an inner electrode 2 are alternately laminated, and an insulating protective film 3 is provided at every other layer. They are so assembled as to be mechanically in series and electrically in parallel, external electrodes 4 are attached, insulating layers 5, 6 are attached to both end faces of a piezoelectric material 1 laminated simultaneously, a magnet 7 is so disposed from both sides together with a base 8 as to preferentially apply a magnetic field in a direction perpendicular to the polarizing direction of the material 1. As a result, a spin-orbit state specified in the initial polarizing direction is maintained.
Inventors:
NAKAZAWA KIYOTO
Application Number:
JP21210587A
Publication Date:
March 02, 1989
Filing Date:
August 26, 1987
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
C04B35/49; H01L41/083; H01L41/187; (IPC1-7): C04B35/49; H01L41/08; H01L41/18
Attorney, Agent or Firm:
Toshio Nakao