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

Patent metadata

Field	Value
Publication number	US-9911536-B2
Application number	US-201515509846-A
Country	US
Kind code	B2
Filing date	Sep 8, 2015
Priority date	Sep 9, 2014
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

The aim of the present invention lies in providing a dielectric composition which has a relatively high dielectric constant of 800 or greater, and which has relatively low dielectric loss of 4% or less when a DC bias of at least 8 V/ym is applied, and also in providing a dielectric element employing said dielectric composition, an electronic component, and a laminated electronic component. A dielectric composition having a main component represented by (Bi a Na b Sr c Ba d ) (α x Ti 1−x )O 3 , characterized in that a is at least one selected from Zr and Sn; and a, b, c, d and x satisfy the following: 0.140≦a<0.390, 0.140≦b<0.390, 0.200≦c<0.700, 0.020≦d<0.240, 0.020≦x<0.240 and 0.950<a+b+c+d≦1.050.

First claim

The invention claimed is:

1. A dielectric composition having a main component represented by (Bi a Na b Sr c Ba d ) (α x Ti 1−x )O 3
characterized in that α is at least one selected from Zr and Sn; and
a, b, c, d and x satisfy the following: 0.140≦a≦0.390, 0.140≦b≦0.390, 0.200≦c≦0.700, 0.020≦d≦0.240, 0.020≦x≦0.240 and 0.950≦a+b+c+d≦1.050.

2. The dielectric composition as claimed in claim 1 , wherein a, b, c, d and x satisfy the following: 0.200≦a≦0.390, 0.200≦b≦0.390, 0.300≦c≦0.700, 0.020≦d≦0.200, 0.020≦x≦0.200 and 0.950≦a+b+c+d≦1.050.

3. A dielectric element comprising the dielectric composition as claimed in claim 1 .

4. An electronic component provided with a dielectric layer comprising the dielectric composition as claimed in claim 1 .

5. A laminated electronic component having a laminated portion formed by alternately laminating an internal electrode layer and a dielectric layer comprising the dielectric composition as claimed in claim 1 .

6. A dielectric composition having a main component represented by (Bi a Na b Sr c Ba d ) (α x Ti 1−x )O 3
characterized in that α is Sn; and
a, b, c, d and x satisfy the following: 0.140≦a≦0.390, 0.140≦b≦0.390, 0.200≦c≦0.700, 0.020≦d≦0.240, 0.020≦x≦0.240 and 0.950≦a+b+c+d≦1.050.

Assignees

• Epcos Ag

Inventors

• Hirose Masakazu
• Imura Tomoya
• Tauchi Goushi

Classifications

• C04B2235/3236

  Alkaline earth titanates · CPC title

• C04B35/6262

  of calcined, sintered clinker or ceramics · CPC title

• C04B2235/3298

  Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate · CPC title

• C04B2235/79

  Non-stoichiometric products, e.g. perovskites (ABO3) with an A/B-ratio other than 1 · CPC title

• C04B35/47

  based on strontium titanates · CPC title