Low temperature sintered ceramic material for use in solid diele

Details Low temperature sintered ceramic material for use in solid diele Low temperature sintered ceramic material for use in solid diele

1984-11-30

1986-09-09

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

361320, 361321, 501138, C04B 3546, H01G 410, H01G 412

Patent

active

046109684

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 one or more of magnesium, zinc, strontium, and calcium, and where k, and x are numerals in the ranges of 1.00 to 1.04, and 0.02 to 0.05, respectively. To this major ingredient is added a minor proportion of a mixture of boron oxide and at least one of barium oxide, magnesium oxide, zinc oxide, strontium oxide, and calcium oxide. For the fabrication of coherently bonded bodies of this composition, as for use as the dielectric 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.

REFERENCES:
patent: 4106075 (1978-08-01), Baumann et al.
patent: 4115493 (1978-09-01), Sakabe et al.
patent: 4308570 (1981-12-01), Burn
patent: 4528613 (1985-07-01), Stetson
patent: 4533974 (1985-08-01), Maher
patent: 4571276 (1986-02-01), Akse

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