Monolithic ceramic capacitors and improved ternary ceramic compo

Details Monolithic ceramic capacitors and improved ternary ceramic compo Monolithic ceramic capacitors and improved ternary ceramic compo

1982-02-18

1983-04-05

McCarthy, Helen M.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

501134, C04B 3500, H01G 412

Patent

active

043793193

ABSTRACT:
A multi-layer ceramic capacitor is prepared from a novel ceramic composition produced from the oxides of lead (PbO), iron (Fe.sub.2 O.sub.3), niobium (Nb.sub.2 O.sub.5), nickel (NiO), and tungsten (WO.sub.3), or the synthesized compounds Pb(Fe.sub.1/2 Nb.sub.1/2)O.sub.3, Pb(Fe.sub.2/3 W.sub.1/3)O.sub.3 and Pb(Ni.sub.1/3 Nb.sub.2/3)O.sub.3, together with a small quantity of a Mn(NO.sub.3).sub.2 solution to improve certain electric properties of the capacitor. When used in the correct proportions the oxides disclosed herein are capable of producing monolithic ceramic capacitors having Z5U ratings. In particular, the lead, nickel, niobate compound tends to flatten and to lower the curie peak for the ceramic composition.

REFERENCES:
patent: 4078938 (1978-03-01), Yonezawa
patent: 4236928 (1980-12-01), Yonezawa et al.
patent: 4308571 (1981-12-01), Tanei et al.
Manual-"Understanding Chip Capacitors", pp. 1-25, Pub'd. by Johanson Dielectrics Inc., Burbank, Calif.

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