Electroceramics and process for making the same

Details Electroceramics and process for making the same Electroceramics and process for making the same

1993-09-01

1994-06-07

Group, Karl

Compositions

Electrically conductive or emissive compositions

Metal compound containing

252521, 428699, 428701, H01B 106

Patent

active

053187253

ABSTRACT:
Principal types of dielectric ceramics include capacitors, and piezoelectric electroptic and optical ceramics. The former are typically barium titanates, the latter, so-called PZT or PLZT materials. The ceramic materials are made by forming an alloy including the metallic elements in substantially stoichiometric proportions, and then oxidizing the alloy to produce the ceramic. In preferred embodiments, the alloy includes a dopant that is encapsulated in a noble metal, preferably silver. Preferred dielectrics are made by making a multi-layer structure in which a plurality of alloy layers (typically less than 20, and preferably less than 5, microns thick) are separated by conductive layers (preferably a noble metal), and then oxidizing the overall structure to form a multi-layer capacitor.

REFERENCES:
patent: 5102864 (1992-04-01), Rapp et al.
"Preparation of High Tc . . . Alloy Powders" Yamada et al; Japanese Jrnl of Appl Phys. vol. 27, No. 5, (May 1988) pp. L802-L803.
"Preparation of High Tc . . . Alloy Ribbon in Air" Matsuzaki et al; Japanese Jrnl of Appl Phys. vol. 26 No. 4 (Apr. 1987) pp. L334-L336.

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