The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1991
Filed:
Feb. 28, 1990
Industrial Technology Research Institute, Chutung, TW;
Abstract
An apparatus for poling a piezoelectric ceramic includes a first and a second electrode which are connected to a DC power supply and spaced away from one another at a certain distance, and an insulated medium provided between the first and second electrodes. The second electrode is adapted to carry the piezoelectric ceramic which is spaced away from the first electrode. In this way, a piezoelectric ceramic can be poled by a poling field created between the first and second electrodes and prevented from being scraped by the first electrode or damaged by the ripples caused by an unstable voltage because of the separation of the piezoelectric ceramic to be poled from the first electrode and the buffering effect caused by the insulated medium between the first and second electrodes. In addition, the second electrode may be specifically in the form of a power-driven metal conveyor so that the piezoelectric ceramic to be poled can continuously pass through and be poled by the poling field.