Dielectric ceramic composition and multilayer ceramic capacitor containing the same

Patent metadata

Field	Value
Publication number	US-9928959-B2
Application number	US-201615065553-A
Country	US
Kind code	B2
Filing date	Mar 9, 2016
Priority date	Jul 6, 2015
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A dielectric ceramic composition and a multilayer ceramic capacitor containing the same are provided. The dielectric ceramic composition contains a base material powder represented by (1−x)BaTiO 3 −xPbTiO 3 containing a first main ingredient represented by BaTiO 3 and a second main ingredient represented by PbTiO 3 , wherein x satisfies 0.0025≤x≤0.4. The multilayer ceramic capacitor includes a ceramic body in which dielectric layers containing the dielectric ceramic composition are alternately stacked with first and second internal electrodes, and first and second external electrodes formed on both end portions of the ceramic body and respectively electrically connected to the first and second internal electrodes.

First claim

What is claimed is:

1. A multilayer ceramic capacitor comprising:
a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and
first and second external electrodes disposed on end portions of the ceramic body and respectively electrically connected to the first and second internal electrodes,
wherein the dielectric layers formed using a dielectric ceramic composition containing a base material powder represented by (1−x)BaTiO 3 −xPbTiO 3 containing a first main ingredient represented by BaTiO 3 and a second main ingredient represented by PbTiO 3 , x satisfying 0.06<x≤0.4, and
wherein the base material powder has an average particle size of 1000 nm or less.

2. The multilayer ceramic capacitor of claim 1 , wherein the dielectric ceramic composition further contains 0.1 to 2.0 mol % of a first accessory ingredient based on 100 mol % of the base material powder, and the first accessory ingredient is an oxide or carbonate containing at least one of Mn, V, Cr, Fe, Ni, Co, Cu, and Zn.

3. The multilayer ceramic capacitor of claim 1 , wherein the dielectric ceramic composition further contains 0.2 to 5.0 mol % of a second accessory ingredient based on 100 mol % of the base material powder, and the second accessory ingredient is an oxide containing Si or a glass compound containing Si.

4. The multilayer ceramic capacitor of claim 1 , wherein the dielectric ceramic composition further contains 0.4 to 12.0 mol % of a third accessory ingredient based on 100 mol % of the base material powder, and the third accessory ingredient is an oxide, carbonate, or fluoride containing Li.

5. The multilayer ceramic capacitor of claim 1 , wherein the first and second main ingredients are solid-dissolved in each other.

6. A multilayer ceramic capacitor comprising:
pluralities of first and second internal electrodes that are alternately stacked; and
a plurality of dielectric layers disposed between adjacent internal electrodes of the stacked first and second internal electrodes,
wherein the dielectric layers contain a dielectric ceramic composition containing a base material powder represented by (1−x)BaTiO 3 −xPbTiO 3 containing BaTiO 3 and PbTiO 3 , where x satisfies 0.06<x≤0.4, and
wherein the dielectric ceramic composition of the dielectric layers is formed using a base material powder having an average particle size of 300 nm.

7. The multilayer ceramic capacitor of claim 6 , wherein the BaTiO 3 and PbTiO 3 are solid-dissolved in each other.

8. The multilayer ceramic capacitor of claim 6 , wherein the dielectric ceramic composition further contains 0.1 to 2.0 mol % of a first accessory ingredient based on 100 mol % of the base material powder, and the first accessory ingredient is an oxide or carbonate containing at least one of Mn, V, Cr, Fe, Ni, Co, Cu, and Zn.

9. The multilayer ceramic capacitor of claim 6 , wherein the dielectric ceramic composition further contains 0.2 to 5.0 mol % of a second accessory ingredient based on 100 mol % of the base material powder, and the second accessory ingredient is an oxide containing Si or a glass compound containing Si.

10. The multilayer ceramic capacitor of claim 6 , wherein the dielectric ceramic composition further contains 0.4 to 12.0 mol % of a third accessory ingredient based on 100 mol % of the base material powder, and the third accessory ingredient is an oxide, carbonate, or fluoride containing Li.

11. The multilayer ceramic capacitor of claim 10 , wherein the first and second internal electrodes include copper (Cu).

12. The multilayer ceramic capacitor of claim 6 , wherein the first and second internal electrodes include palladium (Pd).

13. The multilayer ceramic capacitor of claim 1 , wherein the base material powder has an average particle size of 300 nm.

Assignees

• Samsung Electro Mech

Inventors

• Yoon Seok Hyun
• Wi Sung Kwon
• Park Jung Deok
• Seo Jung Wook
• Nam Chan Hee
• Kim Dong Hun

Classifications

• H01G4/1218

  based on titanium oxides or titanates (H01G4/1245 takes precedence) · CPC title

• C04B35/4684

  containing lead compounds (C04B35/472 takes precedence) · CPC title

• C04B2235/3279

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

• H01G4/248

  the terminals embracing or surrounding the capacitive element, e.g. caps (H01G4/252 takes precedence) · CPC title

• C04B2235/3239

  Vanadium oxides, vanadates or oxide forming salts thereof, e.g. magnesium vanadate · CPC title