Dielectric ceramic body including TiO.sub.2 dispersion in crysta

Details Dielectric ceramic body including TiO.sub.2 dispersion in crysta Dielectric ceramic body including TiO.sub.2 dispersion in crysta

1991-07-22

1993-11-16

Picard, Leo P.

Electricity: conductors and insulators

Conduits, cables or conductors

Preformed panel circuit arrangement

428901, H05K 100

Patent

active

052625958

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.

REFERENCES:
patent: 4301324 (1981-11-01), Kumar et al.
patent: 4604676 (1986-09-01), Senda et al.
patent: 5045402 (1991-09-01), Adams, Jr. et al.
Chemical Abstracts, vol. 114, 1991 pp. 362-363, Feb. 1991.
"Temperature Stabilization of the Dielectric Constant of Cordierite-Based Pyroceramics" G. S. Bogdanova et al., pp. 893-895, Jun. 1971.
"Dependence of the Dielectric Properties of Glass-Ceramics of the System SiO.sub.2 -Al.sub.2 O.sub.3 -Ln*.sub.2 O.sub.3 -MgO-TiO.sub.2 On the Initial Glass Comp." pp. 806-808.
Chemical Abstracts, vol. 113, No. 8, Aug. 1990, pp. 1 and 714.

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