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:
Feb. 07, 2012
Filed:
Dec. 19, 2006
Francois Bamiere, Mannheim, DE;
Katrin Benkert, München, DE;
Stefan Denneler, München, DE;
Morgane Radanielina, Strasbourg, FR;
Carsten Schuh, Baldham, DE;
Francois Bamiere, Mannheim, DE;
Katrin Benkert, München, DE;
Stefan Denneler, München, DE;
Morgane Radanielina, Strasbourg, FR;
Carsten Schuh, Baldham, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A piezoceramic composition has a nominal empirical formula of PbREAE[ZrTi(FeW)]O. RE is a rare earth metal with a fraction b and AE is an alkaline earth metal with a fraction c. Iron is present with an iron fraction f·z, and tungsten with a tungsten fraction w·z. In addition, the following relationships apply: a<1; 0=b=0.15; 0=c=0.5; f>0; w>0; 0.1=f/w=5; x>0; y>0; z>0 and x+y+z=1. A method of producing a piezoceramic material using the piezoceramic composition has the steps: a) provision of a green ceramic body with the piezoceramic composition, and b) heat treatment of the green body, a piezoceramic of the piezoceramic material being produced from the piezoceramic composition. The heat treatment encompasses calcining and/or sintering. The piezoceramic composition undergoes compaction at below 1000° C. Metals which melt at low temperature (such as silver or a silver-palladium alloy with a low palladium content, for example) can therefore be sintered together with the piezoceramic composition.