Methods for controlling the elastic modulus of piezoelectric substances and apparatus therefor

US6018210A · kind A · utility

Assignees

• The Institute of Physical and Chemical Research (Riken) · JP
• Munehiro Date · JP
• Shigeru Sakai · JP

Inventors

• Munehiro Date · Tokyo, JP
• Masayuki Kutani · Wako, JP
• Shigeru Sakai · Echizen, JP

Key dates

• Filing date: Aug 29, 1997
• Grant date: Jan 25, 2000
• Expiry date: Aug 29, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/802

Abstract

The elastic modulus of a piezoelectric substance is controlled over a wide range using a simple method. The effective modulus (the real part of the elastic modulus) and the energy loss modulus (the imaginary part of the elastic modulus) of the piezoelectric substance are changed by installing electrodes on the surface of the piezoelectric substance and by connecting a mechanism consisting of one or more circuit elements to each of the electrodes.