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

Patent metadata

Field	Value
Publication number	US-10777355-B2
Application number	US-201716087790-A
Country	US
Kind code	B2
Filing date	Mar 6, 2017
Priority date	Mar 24, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

[Object] provide a dielectric composition with high voltage resistance and favorable reliability, and an electronic component using the dielectric composition.
[Solving Means] A dielectric composition contains, as a main component, a tungsten bronze type composite oxide represented by a chemical formula (Sr 1.00−s−t Ba s Ca t ) 6.00−x R x (Ti 1.00−a Zr a ) x+2.00 (Nb 1.00−b Ta b ) 8.00−x O 30.00 , in which the R is at least one element selected from Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and s, t, x, a, and b satisfy 0.70≤s≤1.00, 0≤t≤0.30, 0.70≤s+t≤1.00, 0≤x≤0.50, 0.10≤a≤1.00, and 0≤h≤1.00. At least one or more elements selected from Mn, Mg, Co, V, W, Mo, Si, Li, B, and Al are contained as a sub component in 0.10 mol or more and 20.00 mol or less with respect to 100 mol of the main component.

First claim

The invention claimed is:

1. A dielectric composition comprising, as a main component, a tungsten bronze type composite oxide represented by a chemical formula (Sr 1.00−s−t Ba s Ca t ) 6.00−x R x (Ti 1.00−a Zr a ) x+2.00 (Nb 1.00−b Ta b ) 8.00−x O 30.00 ,
wherein the R is at least one element selected from the group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and s, t, x, a, and b satisfy 0.70≤s≤1.00, 0≤t≤0.30, 0.70≤s+t≤1.00, 0.25≤x≤0.50, 0.10≤a≤1.00, and 0≤b≤1.00.

2. The dielectric composition according to claim 1 , wherein at least one selected from the group consisting of Mn, Mg, Co, V, W, Mo, Si, Li, B, and Al is contained as a sub component in 0.10 mol or more and 20.00 mol or less with respect to 100 mol of the main component.

3. The dielectric composition according to claim 1 , wherein a substitution amount a of Zr in the chemical formula is 0.50≤a≤1.00.

4. A dielectric element comprising the dielectric composition according to claim 1 .

5. An electronic component comprising a dielectric layer comprising the dielectric composition according to claim 1 .

6. A multilayer electronic component comprising a multilayer portion wherein a dielectric layer comprising the dielectric composition according to claim 1 and an internal electrode layer are stacked alternately.

Assignees

• Tdk Corp

Inventors

• Aman Sanshiro
• Akiba Hiroki
• Takeuchi Keiko

Classifications

• H01G4/30 Primary

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

• H01G4/1263

  containing also zirconium oxides or zirconates · CPC title

• H01G4/1245

  containing also titanates · CPC title

• C04B35/499

  containing also titanates · CPC title

• H01B3/02

  mainly consisting of inorganic substances · CPC title