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

Patent metadata

Field	Value
Publication number	US-10759709-B2
Application number	US-201716087884-A
Country	US
Kind code	B2
Filing date	Mar 6, 2017
Priority date	Mar 24, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

A dielectric composition with high voltage resistance and favorable reliability, and an electronic component using the dielectric composition. The 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 0.50≤s≤1.00, 0≤t≤0.30, 0.50≤s+t≤1.00, 1.50<x≤3.00, 0.20≤a≤1.00, and 0≤b≤1.00. At least one selected from 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.

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 Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and
s, t, x, a, and b satisfy
0.50≤s≤1.00,
0≤t≤0.30,
0.50≤s+t≤1.00,
1.50<x≤3.00,
0.20≤a≤1.00, and
0≤b≤1.00.

2. The dielectric composition according to claim 1 , wherein at least one selected from 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 alternately stacked.

Assignees

• Tdk Corp

Inventors

• Akiba Hiroki
• Aman Sanshiro
• Takeuchi Keiko

Classifications

• H01B3/12

  ceramics · CPC title

• C04B35/01

  based on oxide ceramics · CPC title

• H01G4/12

  Ceramic dielectrics {(H01G4/085 takes precedence)} · CPC title

• C04B35/495 Primary

  based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates · CPC title

• H01G4/1245

  containing also titanates · CPC title