Dielectric ceramic composition
US6740614B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jul 11, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/85
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A dielectric ceramic composition of high dielectric constant and low dielectric loss, which can be co-fired with Ag electrodes, is provided for use in various parts of electric and electronic appliances. The composition is represented by the following chemical formula:a wt. % {x BaO—y1Nd2O3—y2Sm2O3—w Bi2O3—z TiO2}+b wt. % (ZnO—B2O3—SiO2—PbO based glass frit)+c wt. % CuOwherein, 10.0 mol %≦x≦20.0 mol %; 7.0 mol %≦y1+y2≦20.0 mol %; 0.5 mol %≦w≦5.0 mol %; 60.0 mol %≦z≦80.0 mol %, with the proviso that x+y1+y2+w+z=100; 80.0 wt. %≦a≦98.0 wt. %; 1.0 wt. %≦b≦10.0 wt. %; 1.0 wt. %≦c≦10.0 wt. %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.