Process for making multilayer capacitors

A method of making a monolithic capacitor comprising a plurality of superimposed alternating layers of a dielectric composition and metal electrodes bonded together into a unitary body, the method comprising the steps of

• a. calcining in air, at a peak temperature in the range 750.degree.-900.degree. C., for at least 5 minutes, a mixture of oxides or precursors thereof in such relative proportions to produce a dielectric composition, having the formula
• (Sr.sub.x Pb.sub.1-x TiO.sub.3).sub.a (PbMg.sub.0.5 W.sub.0.5 O.sub.3).sub.b
• wherein
• x is 0-0.10,
• a is 0.35-0.5,
• b is 0.5-0.65, and
• a plus b equals 1,
• then comminuting the resultant calcined product until substantially all the particles are 20 microns or less in largest dimension,
• b. preparing an unsintered flexible ceramic dielectric tape of the calcined product of step (a) in an inert liquid vehicle therefor,
• c. electroding two or more such tapes in the desired pattern with a dispersion of metal powder in an inert vehicle therefor,
• d. laminating a multiple number of such tapes as desired, the top layer being an unelectroded tape, and
• e. sintering the resultant laminate in air for at least 0.25 hour at a temperature in the range 900.degree.-1050.degree. C. to form a unitary monolithic multilayer capacitor having a K of at least 1000 and a dissipation factor of no more than 5%.