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:
Apr. 04, 2023
Filed:
Jan. 14, 2019
Pi Ceramic Gmbh, Lederhose, DE;
Eberhard Hennig, Mörsdorf, DE;
Antje Kynast, Leipzig, DE;
Michael Töpfer, Arnstadt, DE;
Michael Hofmann, Neustadt an der Orla, DE;
PI CERAMIC GMBH, Lederhose, DE;
Abstract
The invention relates to a lead-free piezoceramic material based on bismuth sodium titanate (BST) having the following parent composition: x(BiNa)TiO-yBaTiO-zSrTiOwhere x+y+z=1 and 0<x<1, 0<y<1, 0≤z≤0.07 or x(BiNa)TiO-yBaTiO-zCaTiOwhere x+y+z=1 and 0<x<1, 0<y<1, 0<z≤0.05 or x(BiNa)TiO-y(BiK)TiO-zBaTiOwhere x+y+z=1 and 0<x<1, 0<y<1, 0≤z<1, characterized by addition of a phosphorus-containing material in a quantity that gives a phosphorus concentration of from 100 to 2000 ppm in the piezoceramic material.