Dielectric ceramic body including TiO.sub.2 dispersion in crystallized cordierite matrix phase, method of producing the same, and circuit board using the same
US5262595A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1991 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Jul 22, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dielectric ceramic body prepared by firing a mixture of a cordierite glass powder and a TiO.sub.2 powder, or a mixture of these powders and a RE.sub.2 Ti.sub.2 O.sub.7 powder (RE representing a rare earth element), wherein particles of the Ti.sub.2 powder or particles of Ti.sub.2 powder and the RE.sub.2 Ti.sub.2 O.sub.7 powder are dispersed in a matrix phase of crystalline cordierite produced from the fired cordierite glass powder. In the first case, the cordierite glass powder and the Ti.sub.2 powder have a proportion which satisfies 70.ltoreq.x<100. 0<y.ltoreq.30, and x+y=100, where x and y represent contents in weight % of the cordierite glass powder and said TiO.sub.2 powder, respectively. In the second case, the cordierite glass powder, TiO.sub.2 powder and the RE.sub.2 Ti.sub.2 O.sub.7 powder have a proportion which satisfies 50.ltoreq.x<100, 0<y.ltoreq.30, 0<z.ltoreq.40, and x+y=100, where z represents a content in weight % of the RE.sub.2 Ti.sub.2 O.sub.7 powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.