Nonreducing dielectric ceramic composition

Details Nonreducing dielectric ceramic composition Nonreducing dielectric ceramic composition

1992-06-25

1993-12-07

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

501139, 501 32, C04B 3546

Patent

active

052683427

ABSTRACT:
A nonreducing dielectric ceramic composition that includes BaTi0.sub.3 as a main component, the BaTi0.sub.3 containing alkali metal oxides in an amount more than 0.04 weight % as impurities. One or more of the following rare earth metal oxides (Re.sub.2 O.sub.3): Tb.sub.2 O.sub.3, Dy.sub.2 O.sub.3, Ho.sub.2 O.sub.3 and Er.sub.2 O.sub.3 ; and Co.sub.2 O.sub.3 in the following ratios: BaTiO.sub.3 is 92.0-00.4 mol %; Re.sub.2 O.sub.3 is 0.3-4.0 mol %; and Co.sub.2 O.sub.3 is 0.3-4.0 mol %; the composition also includes the following subcomponents: 0.2-4.0 mol % BaO; 0.2-3.0 mol % of MnO; and 0.5-5.0 mol % of MgO. The composition may include 0.5-2.5 weight parts of oxide glass containing BaO-SrO-Li.sub.2 O-SiO.sub.2 incorporated with 100 weight parts for the above composition. The composition may also include 0.5-4.0 mol % CaTiO.sub.3, 0.5-3.5 mol % CaZrO.sub.3 or one or both of NiO and Al.sub.2 O.sub.3 in an amount 0.3-3.0 mol %. Further, 0.5-2.5 weight parts of oxide glass containing BaO-SrO-Li.sub.2 O-SiO.sub.2 may be incorporated with 100 weight parts of the composition. SiO.sub.2 in an amount of 0.2-3.0 mol % or one or both of NiO and Al.sub.2 O.sub.3 in an amount of 0.3-3.0 mol % may be incorporated in the composition. CaO or SrO may be substituted for BaO.

REFERENCES:
patent: 5075819 (1991-12-01), Saito et al.
patent: 5077636 (1991-12-01), Saito et al.
patent: 5089932 (1992-02-01), Saito et al.
patent: 5089933 (1992-02-01), Saito et al.
patent: 5103369 (1992-04-01), Saito et al.

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