Method of manufacturing low temperature sintered ceramic materia

Details Method of manufacturing low temperature sintered ceramic materia Method of manufacturing low temperature sintered ceramic materia

1985-07-09

1986-12-02

McCarthy, Helen M.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 61, 264 66, 264 82, 361320, 361321, C04B 3546, C04B 4000, H01G 410, H01G 412

Patent

active

046263942

ABSTRACT:
A ceramic composition capable of sintering at a sufficiently low temperature to enable the use of a low cost base metal as the electrode material in the fabrication of capacitors. The major ingredient of the composition is expressed as Ba.sub.k-x M.sub.x O.sub.k TiO.sub.2, where M is at least either of magnesium and zinc and where k and x are numerals in the ranges of 1.00 to 1.04 and of 0.02 to 0.05, respectively. To this major ingredient is added a minor proportion of a mixture of lithium oxide, silicon dioxide, and, possibly, at least one of barium oxide, calcium oxide, and strontium oxide. For the fabrication of coherently bonded bodies of this composition, as for use as the dilectric bodies of capacitors, the moldings of the mixture of the major ingredient and additive in finely divided form are sintered in a reductive or neutral atmosphere and then reheated at a lower temperature in an oxidative atmosphere. The sintering temperature can be so low (typically from 1050.degree. to 1200.degree. C.) that the moldings can be co-sintered with base metal electrodes buried therein without difficulties encountered heretofore.

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