Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1998-03-26
2000-09-12
Kincaid, Kristine
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
3613215, H01G 406
Patent
active
061186481
ABSTRACT:
A non-reductive dielectric ceramic material having a main component represented by [(Ca.sub.X Sr.sub.1-X)O].sub.m [(Ti.sub.Y Zr.sub.1-Y)O.sub.2 ] wherein X, Y and m fulfills 0.ltoreq.X.ltoreq.1, 0.ltoreq.Y.ltoreq.0.10 and 0.75.ltoreq.m.ltoreq.1.04, and auxiliary component containing 0.2-5 mol % (calculated MnO) of Mn oxide, 0.1-10 mol % (calculated as Al.sub.2 O.sub.3) of Al oxide and 0.5-15 mol % of a component of formula [(Ba.sub.Z Ca.sub.1-Z)O].sub.V SiO.sub.2 wherein 0.ltoreq.Z.ltoreq.1 and 0.5.ltoreq.V.ltoreq.4.0; and when used in a laminated ceramic condenser using a base metal such as Ni as inner electrode, can be sintered at a temperature not exceeding 1,300.degree. C., shows a small temperature coefficient of capacitance, can be controlled arbitrarily in the range of -150 to +150 ppm/.degree. C., has a specific resistance of no less than 1.times.10.sup.13 .OMEGA.cm at 25.degree. C., displays a small frequency-dependence of dielectric constant and dielectric loss tangent (tan .delta.) and has a long accelerated lifetime of insulating resistance.
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Kojima Takashi
Nomura Takeshi
Oji Naoto
Sato Akira
Dinkins Anthony
Kincaid Kristine
TDK Corporation
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