Electrically conductive barium sulfate-containing composition an

Details Electrically conductive barium sulfate-containing composition an Electrically conductive barium sulfate-containing composition an

1997-11-21

1999-12-07

Marcantoni, Paul

Compositions

Electrically conductive or emissive compositions

Metal compound containing

2525201, 25252021, 428403, 428918, 1062864, 106461, H01B 100, H01B 108

Patent

active

059977752

ABSTRACT:
The electrically conductive, barium sulfate-containing composition consists of BaSO.sub.4 particles having a surface area of from 0.1 to 150 m.sup.2 /g. The BaSO.sub.4 particles each are provided with a SnO.sub.2 coating having a thickness of 2 to 80 nm and containing from 1 to 15% by weight of the Sb.sub.2 O.sub.3. The electrically conductive, barium sulfate-containing composition is made by a method including the steps of adding a first acidic solution containing 1 to 95% by weight SnCl.sub.4 and a basic solution to an aqueous dispersion from 50 to 800 g/l of BaSO.sub.4 to make a basic mixture having a pH from 9 to 15; then adding an acid to the basic mixture to form an acidic mixture having a pH from 4 to 1; then adding a second acid solution containing 0.5 to 60% by weight of SbCl.sub.3 to the acidic mixture; separating the electrically conductive, barium sulfate-containing composition from the acidic mixture; and drying and igniting the separated electrically conductive, barium sulfate-containing composition at 300 to 800.degree. C.

REFERENCES:
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patent: 5716553 (1998-02-01), Bergmann et al.
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Ichinomiya et al. "White Electrically Conductive Coating Cpd. and White Electrically Conductive Film Comprising Same" JA-62-181371 (Jan. 30, 1988).
Yoshizumi, "Preparation of Conductive Composite Powder", (Mar. 12, 1982) JA 55-59620 Japanese Abstracts.

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