Metallization compositions for BI and PB-containing ceramic diel

Details Metallization compositions for BI and PB-containing ceramic diel Metallization compositions for BI and PB-containing ceramic diel

1993-08-20

1995-02-21

Bell, Mark L.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 105, 420505, 428469, C23C 2004

Patent

active

053912233

ABSTRACT:
It has been newly determined that in a reaction of an Ag/Pd metallization with Pb from a lead-based ceramics, a maximum solubility of Pb is observed of approximately 14% (atomic percent). By inclusion of an effective amount of Pb in the Ag/Pd metallization, leaching of Pb from a Pb-based ceramic is either reduced or eliminated. Thus, upon firing, the metallization exhibits an equilibration which prevents Pb from being drawn out of the underlying ceramic. Similarly, Ag/Pd metallization shows a maximum solubility of 16 atomic percent for Bi in Bi-based ceramics. Inclusion of an effective amount of Bi in the metallization prevents a Bi leaching from an underlying ceramic.

REFERENCES:
patent: 3896054 (1975-07-01), Larry
patent: 4001146 (1977-01-01), Horowitz
patent: 4090009 (1978-05-01), Horowitz
patent: 4394171 (1983-07-01), Nair
patent: 4954926 (1990-09-01), Pepin
PZT-Based Multilayer Piezoelectric Ceramics with AgPd-Internal Electrodes-Ferroelectrics, 1988, vol. 87, pp. 271-294 Wang et al. No Month.
Interaction of Silver/Palladium Electrode Systems with Flux-Sinter Barium Titanate Dielectrics-A Thesis in Ceramic Science by Sea-Fue Wang, Dec., 1991.

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