Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1998-07-22
2000-06-20
Kincaid, Kristine
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
501136, 501137, H01G 700, H01G 406
Patent
active
060784946
ABSTRACT:
A capacitor including a ceramic dielectric of a dielectric ceramic composition including a doped barium-calcium-zirconium-titanate of the composition (Ba.sub.1-.alpha.-.mu.-.nu. A.sub..mu. D.sub..nu. Ca.sub..alpha.) [Ti.sub.1-x-.delta.-.mu.'-.nu.' Mn.sub..delta. A'.sub..mu.' Zr.sub.x ].sub.z O.sub.3, where A=Ag, A'=Dy, Er, Ho, Y, Yb and Ga; D=Nd, Pr, Sm, Gd; D'=Nb, Mo, 0.10.ltoreq.x.ltoreq.0.25, 0.ltoreq..mu..ltoreq.0.01, 0.ltoreq..mu.'.ltoreq.0.01, 0.ltoreq..nu..ltoreq.0.01, 0 .nu.'0.01, 0<.delta..ltoreq.0.01 and 0.995.ltoreq.z<1 and 0.ltoreq..alpha..ltoreq.0.05, and including at least two electrodes, is characterized by a high dielectric constant K and a long service life, a low loss factor, a high insulation resistance and a capacitance with a low voltage dependence. The temperature dependence of its dielectric constant K corresponds to the EIA-standard Y5V.
REFERENCES:
patent: 5319517 (1994-06-01), Nomura et al.
patent: 5335139 (1994-08-01), Nomura et al.
patent: 5337209 (1994-08-01), Sutherland et al.
patent: 5889647 (1999-03-01), Hansen et al.
Dinkins Anthony
Kincaid Kristine
Spain Norman N.
U.S. Philips Corporation
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