Dielectric ceramic composition and multilayer ceramic capacitor containing the same

Patent metadata

Field	Value
Publication number	US-2016307701-A1
Application number	US-201615040237-A
Country	US
Kind code	A1
Filing date	Feb 10, 2016
Priority date	Apr 16, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

There are provided a dielectric ceramic composition and a multilayer ceramic capacitor containing the same. The dielectric ceramic composition according to the present disclosure may contain a main base material ingredient and a first accessory ingredient, wherein the first accessory ingredient contains samarium (Sm) and other rare earth (RE) elements, and a ratio (a/b) of a content (a) of samarium (Sm) to a content (b) of other rare earth elements in the first accessory ingredient satisfies 0.1≦a/b≦2.0.

First claim

What is claimed is:

1 . A dielectric ceramic composition comprising a main base material ingredient and a first accessory ingredient,
wherein the first accessory ingredient contains samarium (Sm) and other rare earth (RE) elements, and 0.1≦a/b≦2.0, where a is a content of samarium (Sm) and b is a content of other rare earth elements in the first accessory ingredient.

2 . The dielectric ceramic composition of claim 1 , wherein the main base material ingredient contains at least one selected from the group consisting of BaTiO 3 , (Ba 1-x Ca x ) (Ti 1-y Ca y )O 3 (0≦x≦0.3, 0≦y≦0.1), (Ba 1-x Ca x ) (Ti 1-y Zr y )O 3 (0≦x≦0.3, 0≦y≦0.5), Ba(Ti 1-y Zr y )O 3 (0<y≦0.5), and (Ba 1-x Ca x ) (Ti 1-y Sn y )O 3 (0≦x≦0.3, 0≦y≦0.5).

3 . The dielectric ceramic composition of claim 1 , further containing 0.1 to 1.0 at % of a second accessory ingredient, an oxide or carbonate containing at least one of Mn, V, Cr, Fe, Ni, Co, Cu, and Zn, based on 100 at % of the main base material ingredient.

4 . The dielectric ceramic composition of claim 1 , further containing 0.1 to 1.0 at % of a third accessory ingredient, an oxide or carbonate containing at least one of Mg and Al, based on 100 at % of the main base material ingredient.

5 . The dielectric ceramic composition of claim 1 , further containing a fourth accessory ingredient, an oxide or carbonate containing at least one of Ce, Nb, La, and Sb; and a fifth accessory ingredient, an oxide or carbonate containing at least one of Si, Ba, Ca, and Al, or a glass compound containing Si.

6 . The dielectric ceramic composition of claim 1 , wherein a permittivity is 5000 or more at room temperature.

7 . The dielectric ceramic composition of claim 1 , wherein an average particle size of the main base material ingredient powder is 1000 nm or less.

8 . 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 formed on both end portions of the ceramic body and electrically connected to the first and second internal electrodes, wherein the dielectric layers contain a dielectric ceramic composition containing a main base material ingredient and a first accessory ingredient, the first accessory ingredient containing samarium (Sm) and other rare earth (RE) elements, and 0.1≦a/b≦≦2.0, where a is a content of samarium (Sm) and b is a content of other rare earth elements in the first accessory ingredient.

9 . The multilayer ceramic capacitor of claim 8 , wherein the main base material ingredient contains at least one selected from the group consisting of BaTiO 3 , (Ba 1-x Ca x ) (Ti 1-y Ca y )O 3 (0≦x≦0.3, 0≦y≦0.1), (Ba 1-x Ca x ) (Ti 1-y Zr y )O 3 (0≦x≦0.3, 0≦y≦0.5), Ba(Ti 1-y Zr y )O 3 (0<y≦0.5), and (Ba 1-x Ca x ) (Ti 1-y Sn y )O 3 (0≦x≦0.3, 0≦y≦0.5).

10 . The multilayer ceramic capacitor of claim 8 , wherein the dielectric ceramic composition further contains 0.1 to 1.0 at % of a second accessory ingredient, an oxide or carbonate containing at least one of Mn, V, Cr, Fe, Ni, Co, Cu, and Zn, based on 100 at % of the main base material ingredient.

11 . The multilayer ceramic capacitor of claim 8 , wherein the dielectric ceramic composition further contains 0.1 to 1.0 at % of a third accessory ingredient, an oxide or carbonate containing at least one of Mg and Al, based on 100 at % of the main base material ingredient.

12 . The multilayer ceramic capacitor of claim 8 , wherein the dielectric ceramic composition further contains a fourth accessory ingredient, an oxide or carbonate containing at least one of Ce, Nb, La, and Sb; and a fifth accessory ingredient, an oxide or carbonate containing at least one of Si, Ba, Ca, and Al, or a glass compound containing Si.

13 . The multilayer ceramic capacitor of claim 8 , wherein an average particle size of dielectric grains of the dielectric layer is 0.05 to 0.8 μm.

14 . The multilayer ceramic capacitor of claim 8 , wherein a permittivity is 5000 or more at room temperature.

15 . The multilayer ceramic capacitor of claim 8 , wherein an average particle size of the main base material ingredient powder is 1000 nm or less.

16 . The dielectric ceramic composition of claim 3 , further containing 0.1 to 1.0 at % of a third accessory ingredient, an oxide or carbonate containing at least one of Mg and Al, based on 100 at % of the main base material ingredient.

17 . The dielectric ceramic composition of claim 1 , wherein a content of the first accessory ingredient is 0.1 to 3.0%, based on 100 at % of the main base material ingredient.

18 . A dielectric ceramic composition comprising a main base material ingredient and containing:
0.1 to 3.0 at % of a first accessory ingredient, the first accessory ingredient containing samarium (Sm) and other rare earth (RE) elements, and 0.1≦a/b≦≦2.0, where a is a content of samarium (Sm) and b is a content of other rare earth elements in the first accessory ingredient, based on 100 at % of the main base material ingredient; 0.1 to 1.0 at % of a second accessory ingredient, an oxide or carbonate containing at least one of Mn, V, Cr, Fe, Ni, Co, Cu, and Zn, based on 100 at % of the main base material ingredient; and 0.1 to 1.0 at % of a third accessory ingredient, an oxide or carbonate containing at least one of Mg and Al, based on 100 at % of the main base material ingredient.

19 . The dielectric ceramic composition of claim 18 , further containing a fourth accessory ingredient, an oxide or carbonate containing at least one of Ce, Nb, La, and Sb; and a fifth accessory ingredient, an oxide or carbonate containing at least one of Si, Ba, Ca, and Al, or a glass compound containing Si.

Assignees

• Samsung Electro Mech

Inventors

• Park Jae Sung
• Nam Chan Hee
• Kim Doo Young
• Yoon Seok Hyun
• Choi Du Won
• Kim Chang Hoon

Classifications

• H01G4/30

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

• H01G4/1218 Primary

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

• C04B35/4682

  based on BaTiO3 perovskite phase · CPC title

• H01G4/1245

  containing also titanates · CPC title

• H01G4/232

  electrically connecting two or more layers of a stacked or rolled capacitor · CPC title