Hermann C. Starck Berlin

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Reinhard Hahn

Dieter Behrens

Thomas Engelhardt

An iodine adsorption agent is described, containing silver or a silver salt on a porous, temperature-resistant and acid-resistant organic carrier with an average pore diameter in the range from 6 to 200 nm. It has a pore diameter distribution in which 80% of the pore volume is contained in pores whose diameters lie within the range of .+-.50% about the average pore diameter.

Iodine adsorption agent

An electrode having an electrical capacitance in excess of 10,000 .mu.C/g prepared by sintering a tantalum powder having a grain size finer than 2.5 .mu.m, and the process of preparation.

Electrodes of sintered tantalum powder of fine grain size and process of

An anhydrous mixture of extrudable viscosity of an activated alkali metal tantalum or niobium halide powder, an alkali metal halide powder, and a molten alkali metal in about 1:0.75-2.0:4.75-5.5 molar ratio is formed into a paste which is extruded and formed into masses of critical dimensions and temperature. The mass is ignited and a self-sustaining reduction reaction ensues. The reaction product is powdered, washed and dried. The product is pure tantalum or niobium powder in almost quantitative yield. The powder is specially suited for use as electrolytic capacitor anodes. The powder is improved by passage through a plasma of an inert gas. The process can be performed on a continuous scale.

Process for the preparation of tantalum and niobium powders of improved

The production of highly porous sintered bodies useful for the manufacture of electrolytic capacitors by using as a lubricant for the base metal powder, usually tantalum, about 0.01 to about 10% by weight of an inorganic lubricant, namely nitrides of boron or silicon.

Method of producing porous metal bodies for use in the electronic

The production of highly porous sintered bodies useful for the manufacture of electrolytic capacitors by using as a lubricant for the base metal powder, usually tantalum, about 0.01 to about 10% by weight of an inorganic lubricant, particularly a sulfide, selenide or telluride of a metal of subgroup V or VI of the Periodic Table or nitrides of boron or silicon.

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Langelsheim, Germany

Reinhard Hahn