Grain boundary layer dielectric ceramic compositions

Details Grain boundary layer dielectric ceramic compositions Grain boundary layer dielectric ceramic compositions

1981-04-01

1982-12-07

Cooper, Jack

Compositions

Barrier layer device compositions

Group vi element-containing

252520, 252521, 501136, H01B 312, C04B 3546

Patent

active

043626378

ABSTRACT:
Grain boundary layer dielectric ceramic compositions comprising semiconductive ceramic grains having a composition of 50.23 to 49.47 mol % of SrO and CaO, 49.72 to 50.23 mol % of TiO.sub.2, 0.05 to 0.3 mol % of Nb.sub.2 O.sub.5, substantially each of said grains being surrounded by grain boundary layer dielectric materials which are formed by grain boundary diffusion of a mixture having a composition of 93.5 to 8.5 mol % of Bi.sub.2 O.sub.3, 4.5 to 45 mol % of Cu.sub.2 O, 0.5 to 4 mol % of MnO.sub.2, 1 to 8.5 mol % of B.sub.2 O.sub.3, 0.5 to 17 mol % of La.sub.2 O.sub.3, and below 17 mol % of TiO.sub.2.
These ceramic compositions provide capacitors having a temperature coefficient of capacitance less than .+-.15%, an apparent dielectric constant higher than 35,000, a dielectric loss less than 0.01 and a breakdown voltage higher than 500 V/mm; or capacitors having a temperature coefficient of capacitance less than .+-.10%, an apparent dielectric constant higher than 20,000, a dielectric loss less than 0.01 and a breakdown voltage higher than 700 V/mm; or capacitors having a temperature coefficient of capacitance less than .+-.5%, an apparent dielectric constant higher than 5,000, a dielectric loss less than 0.01 and a breakdown voltage higher than 700 V/mm.

REFERENCES:
patent: 3350212 (1967-10-01), Fujiwara
patent: 3666505 (1972-05-01), Hoffman et al.
patent: 4073846 (1978-02-01), Masumura et al.
patent: 4143207 (1979-03-01), Itakura et al.
patent: 4237084 (1980-12-01), Payne et al.

Affiliated with

Also associated with

Rating

Grain boundary layer dielectric ceramic compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Grain boundary layer dielectric ceramic compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Grain boundary layer dielectric ceramic compositions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1902397