Piezoelectric structure composed of a ceramic ferro-electric material having a perovskite arrangement of components

Abstract

Abstract WHEREIN X, Y AND Z ARE NUMERALS THE SUM OF WHICH IS EQUAL TO 1. THE FERRO-ELECTRIC MATERIALS ALSO INCLUDES ABOUT 1% OF MNO2 AND 0.15% AL2O3 BY WEIGHT OF ALL OF THE COMPONENTS. THE DISCLOSED STRUCTURE HAS AN IMPROVED ELECTRO-MECHANICAL COUPLING FACTOR K, AN IMPROVED MECHANICAL QUALITY FACTOR Q AND AN INCREASED DIELECTRIC EVALUE FACTOR, ALL OF WHICH FACTORS ARE SELECTIVELY ADJUSTABLE BY SELECTION OF INDIVIDUAL COMPONENTS AND THEIR AMOUNTS. XPBTIO3-YPBZRO3-2PB(MG0.5W0.5)O3 A PIECOELECTRIC STRUCTURE COMPRISED OF A CERAMIC FEROELECTRIC MATERIAL HAVING A PEROVSKITE ARRANGEMENT OF COMPONENTS DEFINED BY THE GENERAL FORMULA: 41 THROUGH 49 MOL PERCENT PBTIO3, 37 THROUGH 49 MOL PERCENT PBZRO3 AND 5 THROUGH 18 MOL PERCENT PB(ANBMO3, WHEREIN A AND B ARE BOTH INDIVIDUAL AND DISTINCT CHEMICAL ELEMENTS, EACH HAVING A POSITIVE VALENCE AND N AND M ARE POSITIVE NUMERALS, THE SUM OF WHICH EQUALS 1 AND THE SUM OF THE PRODUCT OF THE VALANCE AXN PLUS THE PRODUCT OF THE VALENCE OF BXM IS EQUAL TO 4. FOR EXAMPLE, A PERFERED PEROVSKITE ARRANGEMENT FOR A PREFERRED FERROELECTRIC MATERIAL IS

Inventors

• 👤 Helmut Thomann

Bibliographic Details