Abstract: Multilayer capacitors with have been made including a cadmium silicate flux by firing in a closed crucible at about 1100.degree. C. to provide a high K and smooth X7R coefficient of K with temperature, but tend to acquire a low insulation resistance in a high temperature life test under voltage. This problem was solved heretofore by the added step of a post-sinter anneal. However, the anneal step adds cost and further complexity to the manufacturing process.

Abstract: Disc and monolithic (multilayer) ceramic capacitors having a fine grained barium titanate body exhibit a high dielectric constant and a smooth (X7R) temperature coefficient of capacitance. The start ceramic materials for making such capacitors are predominantly spherical barium titanate powder particles of average particle size less than 0.7 micron and of narrow particle size distribution. The barium titanate is mixed with around 2 weight percent of a the cadmium silicate flux, 3Cd.SiO.sub.2, serving as a reactivity and sintering promoting agent; and about one weight percent of a reactivity and sintering inhibitor agent, Nb.sub.2 O.sub.5. After preparing a green body of this mixture, the body is sintered at about 1100.degree. C.