Dielectric composition, dielectric element, electronic component and laminated electronic component

Patent metadata

Field	Value
Publication number	US-10501374-B2
Application number	US-201615577318-A
Country	US
Kind code	B2
Filing date	May 24, 2016
Priority date	May 27, 2015
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

The present invention relates to a dielectric composition having a main component and an auxiliary component. The main component is represented by (Bi a Na b Sr c Ln d )TiO 3 , where Ln comprises a rare earth element 0.100≤a≤0.400, 0.100≤b≤0.400, 0.100≤c≤0.700, 0≤d≤0.100, and 0.900≤a+b+c+d≤1.50. The auxiliary component contains a first auxiliary component or a second auxiliary component. The first auxiliary component includes an element selected from the group consisting of Li and K and combinations thereof and the second auxiliary component includes an element selected from the group consisting of Cu, Zn, Mn, Mg and Co and combinations thereof.

First claim

The invention claimed is:

1. A dielectric composition comprising:
a main component represented by (Bi a Na b Sr c Ln d )TiO 3 ,
where
Ln comprises a rare earth element;
0.100≤a≤0.400;
0.100≤b≤0.400
0.100≤c≤0.700;
0≤d≤0.100; and
0.900≤a+b+c+d≤0.050; and
an auxiliary component containing a first auxiliary component or a second auxiliary component,
wherein the first auxiliary component comprises, and
wherein the second auxiliary component comprises an element selected from the group consisting of Cu, Zn, Co and combinations thereof.

2. The dielectric composition according to claim 1 , wherein the auxiliary component contains both the first auxiliary component and the second auxiliary component.

3. The dielectric composition according to claim 1 , wherein the dielectric composition contains at least 0.5 molar parts and less than 7 molar parts of the first auxiliary component, with respect to 100 molar parts of Ti contained in the main component.

4. The dielectric composition according to claim 1 , wherein the dielectric composition contains at least 0.05 molar parts and less than 5 molar parts of the second auxiliary component, with respect to 100 molar parts of Ti contained in the main component.

5. A laminated electronic component comprising:
a laminated portion formed by alternately laminating a plurality of internal electrode layers and dielectric layers, each dielectric layer comprising the dielectric composition according to claim 1 .

6. The laminated electronic component according to claim 5 , wherein the internal electrode layers are formed using a paste, and wherein the paste is prepared by mixing a conductive material comprising metals, alloys, or compounds that form the conductive material after baking, organometallic compounds and resinates with an organic vehicle or an aqueous vehicle.

7. The laminated electronic component according to claim 5 , wherein the internal electrode layers comprise Ag, Ag—Pd alloy, Ni or Cu.

8. The laminated electronic component according to claim 5 , further comprising terminal electrodes constructed from a conductive material.

9. The laminated electronic component according to claim 8 , wherein the terminal electrodes having comprise Ag, Au or Cu as a main component.

10. The laminated electronic component according to claim 5 , wherein the laminated electronic component is a laminated ceramic capacitor.

Assignees

• Tdk Electronics Ag

Inventors

• Terada Tomohiro
• Katagi Yu
• Imura Tomoya

Classifications

• C04B2237/595

  whereby the interlayer is continuous, but heterogeneous on macro-scale, e.g. one part of the interlayer being a joining material, another part being an electrode material · CPC title

• H01G4/1218

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

• C04B2235/80

  Phases present in the sintered or melt-cast ceramic products other than the main phase · CPC title

• C04B2235/3229

  Cerium oxides or oxide-forming salts thereof · CPC title

• C04B2235/3227

  Lanthanum oxide or oxide-forming salts thereof · CPC title