Piezoelectric ceramic material, method for the production thereof, and multilayer component

US8970094B2 · kind B2 · utility

Assignee

• EPCOS AG · DE

Inventors

• Michael Schossmann · Hall in Tirol, AT
• Adalbert Feltz · Jena, DE

Key dates

• Filing date: Dec 15, 2010
• Grant date: Mar 3, 2015
• Expiry date: Nov 24, 2031

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/768
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A piezoelectric ceramic material has the general formula: P1-c-dDcZd(PbO)w where: 0<c≦0.025; 0≦d≦0.05; 0≦w≦0.05; where P stands for a compound having the formula [Pb1-vAgIv][(Zr1-yTiy)1-uCuIIu]O3, where 0.50≦1−y≦0.60; 0<u≦0.0495; 0≦v≦0.02, and D stands for a component of the general formula [(M1O)1-p(M2O)p]a[Nb2O5]1-a, where M1 stands for Ba1-tSrt, where 0≦t≦1, M2 stands for Sr and/or Ca, and 0<p<1 and ⅔<a<1 and Z stands for a compound of the general formula: Pb(L1Rr)O3 where L is present in the oxidation state II or III, and R is present in the oxidation state VI or V, and: LII is selected from among Fe, Mg, Co, Ni and Cu in combination with RVI=W, where 1=½ and r=½, or LIII is selected from among Fe, Cr and Ga in combination with RV=Nb, Ta or Sb, where 1=½ and r=½, or LIII is selected from among Fe, Cr and Ga in combination with RVI=W, where 1=⅔ and r=⅓.