Dielectric material, and a condenser made from the same

Details Dielectric material, and a condenser made from the same Dielectric material, and a condenser made from the same

1991-10-18

1993-02-02

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

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

501135, 501136, C04B 3546

Patent

active

051837862

ABSTRACT:
The dielectric material includes a pre-baked powder containing Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3, BaTiO.sub.3, and BaZrO.sub.3, and lead oxides alone or lead oxides and copper oxides in combination. Thus, the dielectric material is sintered at low temperatures of 800.degree.-1000.degree. C., and makes it possible to use inexpensive electrode materials such as copper, silver, and silver-palladium alloy for the electrode. The dielectric material also makes it possible to produce a ceramic condenser or a thin condenser having a stable capacitance irrespective of changes in temperature.

REFERENCES:
"Dielectric lead titanate zirconate compositions" Takagi et al. (1989) JP 01305856 A2 Jpn. Kokai Tokkyo Koho 4 pages.
"A Lead Perovskite .mu.5 V dielectric for multilayer ceramic capacitor" Furukawa et al. Japanese Journal of Appl. Physics Part 1, 26 (Suppl. 26-2), 34-7 (1987).
"Effect of Excess PbO on the Sintering Characteristics and Dielectric Properties of Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 --PbTiO.sub.3 Based Ceramics" Guha et al. J. American Ceram. Soc. 71(3) C-152-C-154 (1988).
"Stabilization of the Perovskite Phase and Dielectric Properties in the lead magnesium niobium oxide [Pb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 ]-barium titanate system" Kang et al. J. Mater. Sci., 26(1), pp. 56-60 (1991).
H. Kanai, et al. "Effects of Specific Surface Area Of Starting Pre-Calcined Dielectric Powders On Sintering Behavior And Dielectric Properties Of Relaxor/Modified BaTiO.sub.3 Composite", Supp. 28-2, pp. 31-34, Japanese Journal of Applied Physics (1989).
K. Ohnishi, et al. "Mix Sintering Ferroelectric Materials Using HIP", Japanese Journal of Applied Physics, Supp. 28-2, pp. 74-76 (1989).

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