Ceramic material and capacitor comprising the ceramic material

Patent metadata

Field	Value
Publication number	US-10217566-B2
Application number	US-201615056156-A
Country	US
Kind code	B2
Filing date	Feb 29, 2016
Priority date	Apr 10, 2012
Publication date	Feb 26, 2019
Grant date	Feb 26, 2019

Abstract

A ceramic material for capacitors using multilayer technology of formula (I): Pb(1−1.5a)AaBb(Zr1−xTix)(1−c−d−e−f)CeSicO3+y·PBO wherein A is selected from the group consisting of La, Nd, Y, Eu, Gd, Tb, Dy, Ho, Er and Yb; C is selected from the group consisting of Ni and Cu; and 0<a<0.12, 0.05≤x≤0.3, 0≤c<0.12, 0.001<e<0.12 and 0≤y<1.

First claim

The invention claimed is:

1. A capacitor comprising:
at least one ceramic layer composed of a ceramic material for capacitors using multilayer technology of formula (I):
Pb (1−1.5a+e) A a (Zr 1−x Ti x ) (1−c−e) C e Si c O 3 +y·PbO   (I)

wherein
A is selected from the group consisting of La, Nd, Y, Eu, Gd, Tb, Dy, Ho, Er and Yb;
C is selected from the group consisting of Ni and Cu; and
0<a<0.12
0.05≤x≤0.3
0≤c<0.12
0.001<e<0.12
0≤y<1, and
a conductive electrode formed on the at least one ceramic layer, wherein the current-carrying capacity at 100° C. is at least 1A/μF.

2. The capacitor according to claim 1 , wherein the conductive electrode is arranged between adjacent ceramic layers.

3. The capacitor according to claim 1 , wherein the conductive electrode comprises a base metal.

4. The capacitor according to claim 1 , wherein the current-carrying capacity is at least 1A/μF at −40° C. to 150° C.

5. The capacitor according to claim 4 , wherein the base metal is Ag or Cu.

6. The capacitor according to claim 1 , wherein the current-carrying capacity is at least 1A/μF at 80° C. to 150° C.

7. The capacitor according to claim 2 , wherein the current-carrying capacity is at least 1A/μF at −40° C. to 150° C.

8. The capacitor according to claim 2 , wherein the current-carrying capacity is at least 1A/μF at 80° C. to 150° C.

9. The capacitor according to claim 3 , wherein the current-carrying capacity is at least 1A/μF at −40° C. to 150° C.

10. The capacitor according to claim 3 , wherein the current-carrying capacity is at least 1A/μF at 80° C. to 150° C.

Assignees

• Epcos Ag

Inventors

• Engel Günter
• Schossmann Michael
• Koini Markus
• Testino Andrea
• Hoffmann Christian

Classifications

• H01G4/30 Primary

  Stacked capacitors (H01G4/33 takes precedence) · CPC title

• H01G4/012

  Form of non-self-supporting electrodes · CPC title

• C04B35/491

  based on lead zirconates and lead titanates {, e.g. PZT} · CPC title

• C04B2235/3279

  Nickel oxides, nickalates, or oxide-forming salts thereof · CPC title

• C04B41/88

  Metals · CPC title