Dielectric compositions with high dielektrozitaetskonstante and fine grain sizes

摘要

A composition comprising finely divided particles of modified barium titanate; and an admixture of calcium, titanium and manganese; the modified barium titanate particles containing Zr, Zn and Nb homogeneously distributed on an atomic scale throughout the particles according to the formula:PPBaTi.sub.1-(x+3y/2) (Zr.sub.x Zn.sub.y/2 Nb.sub. y) O.sub.3PPwherein x=0.01-0.20 and y=0.005-0.075. This composition forms a dielectric layer having a Curie Temperature below 25. degree. C., a dielectric constant of at least 10,000 and grain size of 5 microns or less and is useful in multilayer electrical devices such as circuits and capacitors.