Compositions – Electrically conductive or emissive compositions – Metal compound containing
Patent
1998-07-02
1999-11-09
Kopec, Mark
Compositions
Electrically conductive or emissive compositions
Metal compound containing
338 20, 423101, 423DIG14, H01B 108, H01C 710, C01G 102
Patent
active
059807873
ABSTRACT:
A protective element for an electrochemical accumulator is made of granular varistor material, the mean diameter of the grains of the varistor material being less than 1 .mu.m, in particular less than 250 nm and, for more than 60% of the grains of the varistor material, the grain size deviating by at most 40% from its statistical average. For the preparation of such grains, a dispersion is made up to form biochemical hollow bodies which have an internal diameter in accordance with the above requirements. The dispersion is admixed with salts which dissolve in the dispersion with the formation of intermediate ions of a substance forming an intermediate for a varistor material, the intermediate ion of a substance forming an intermediate for a varistor material being an intermediate ion of an element required for the varistor material or of a corresponding compound. The intermediate ions of a substance forming an intermediate for a varistor material are positioned in the enclosed void of the hollow bodies, being used to form the grains of the varistor material or an intermediate of corresponding shape, which are released by removing the sheath of the hollow bodies.
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Hilpert Reinhold
Maly-Schreiber Martha
Ritter Josef
Van Zyl Arnold
Daimler-Chrysler AG
Kopec Mark
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