Abstract: A process for producing a casting ceramic including water glass and a powder containing silicon and aluminum, includes mixing epoxy resin based on bisphenol-A into a casting ceramic to reduce open porosity. The casting ceramic is subsequently subjected to at least one heat treatment.

Abstract: Plastic cable with at least one electric conductor which is surrounded by a cable covering which, besides an insulating layer comprises several electrically conducting layers of a polymer material. At least one electrically conducting layer is made of a polymer, a mixed polymerizate or a polymer alloy which is meltable and/or soluble, and the electric conductivity of which can be adjusted to a defined value by a content of charge transfer complexes.

Abstract: Method for manufacturing a conductive plastic of a defined conductivity by forming a polymer alloy. A polar or nonpolar insulating polymer and a polar or nonpolar conductive polymer are used for forming the polymer alloy. The two polymers are mixed together and they are homogeneously distributed within the polymer alloy.

Abstract: Rechargeable electrochemical storage cell with an anode and a cathode, both of which are made of synthetic polymer and are surrounded by a liquid electrolyte. The anode as well as the cathode are made of synthetic polymers which has triaromatic methane units as building blocks, and the polymers are electrochemically doped reversably with ionic doping substances.

Abstract: Substituted polyacetylenes are prepared by contacting a mixture of acetylene and a substituted acetylene with a polymerization catalyst. The substituents on the polyacetylene chains increase the distance between neighboring parallel chains and shield the chains from attack by oxygen, thereby preventing crosslinking of the chains.

Abstract: Electrochemical storage cell or battery of the alkali metal and chalcogen type with at least one anode space intended for receiving the anolyte and a cathode space for receiving the catholyte. The spaces are separated from each other by an alkali-ion-conducting solid electrolyte wall, and sulfur or sulfides are filled into the cathode space. The cathode space is filled with two or more porous layers of which always at least one is ion-conducting and one is electron-conducting. At least one ion-conducting layer rests at least in regions against the solid electrolyte, and at least one electron-conducting layer rests at least in some areas against the metallic housing of the storage cell. An electron-conducting layer is adjacent to each ion-conducting layer and vice versa. At least the electron-conducting layer is impregnated with sulfur.

Abstract: Electrochemical storage cell or battery of the alkali metal and sulfur type operable in the range from about 100.degree. C. to 200.degree. C. A solvent component is added to the cathode chamber, which solvent will at least partially dissolve sulfur and is stable under the conditions of operation.

Abstract: Electrochemical storage cell of the alkali metal-and-chalcogen type with at least two spaces (anode and cathode space) separated by an alkali-ion-conducting solid electrolyte for receiving the reactants. The cathode space contains as catholyte at least one chalcogen or chalcogenide in dissolved or melted form, preferably sulfur or sulfides, as well as carbon- or graphite felt as the electrode material. The felt is provided with a layer that is porous, i.e., the surface of its fibers expose, in island-fashion, an alkali-ion-conducting substance which permits improved rechargeability at lower temperatures.

Abstract: An electrochemical storage cell or battery with at least one anode filled with a molten alkali metal as the anolyte and at least one cathode chamber filled with a sulfur-containing catholyte substance with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte. To the catholyte substance in the cathode chamber is added a chemical compound of the polar bond type which can charge the sulfur positively while absorbing electrons. This induces mobilization of the sulfur phase in the cathode chamber and prevents major accumulation of liquid sulfur as an insulator. As a result the cell can be repeatedly recharged with large currents to a greater capacity.

Abstract: Electrochemical storage cell or battery of the alkali metal and sulfur type operable in the range from about 100.degree. to 200.degree. C. A solvent is added to the alkali sulfides in the cathode chamber to at least partially dissolve the sulfides. In addition to other good properties, the solvent of the invention is outstanding with respect to stability, i.e. can be used for very long periods of time under the conditions of operation without decomposing.

Abstract: An electrochemical storage cell or battery with at least one anode filled with a molten alkali metal as the anolyte and at least one cathode chamber filled with a sulfur-containing catholyte substance with the anode chamber and the cathode chamber separated from each other by an alkali-ion-conducting solid electrolyte. To the catholyte substance is added an additive which converts the sulfur chains into an electrically charged state for obtaining electromigration of the sulfur phase. This induces mobilization of the sulfur phase in the cathode chamber and prevents major accumulation of liquid sulfur as an insulator. As a result the cell can be repeatedly recharged with large currents to a greater capacity. Additives are a dienophilic compound or a reaction product of a dienophilic compound and sulfur.

Abstract: An electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, and felt with course-pores and/or low electric conductivity and felt with fine-pores and/or higher electric conductivity located in the cathode chamber, with the felt of coarse-pores and/or low conductivity disposed near the solid electrolyte and the felt of fine-pores and/or higher conductivity disposed further away from the solid electrolyte. This permits rapid and more complete recharging of the cell for covering peak loads in electrical networks.

Abstract: An electrochemical storage cell or battery based on an alkali metal and sulfur having at least one anode chamber and at least one cathode chamber separated from each other by an ion-conducting solid electrolyte, a felt fabric with capillary activity located in the cathode chamber, and an additive lowering the viscosity of the sulfur in the cathode chamber. Preferred additives are selenium, boron and iodine. Lowering the viscosity of the sulfur permits recharging the cell to a greater capacity.

Abstract: Electrochemical storage cell or battery based on sodium and sulfur having an anode chamber and a cathode chamber separated from each other by a dividing wall capable of conducting sodium ions, is provided with a screening electrode disposed in the chamber containing sulfur as a reactant between the dividing wall and the outer cell wall of said chamber to electrically screen the cell wall and thereby minimize corrosion of the cell wall.

Abstract: An electrochemical storage cell or battery based on alkali metal and sulfur with at least one anode chamber containing alkali metal and one cathode chamber containing sulfur-alkali compounds separated from each other by an ion-conducting solid electrolyte wherein the sulfur-alkali compounds are at least partially dissolved in an organic liquid solvent with a boiling point above the operating temperature of the cell, the operating temperature being in the range of about 100.degree. to 200 C. The solvent permits lower operating temperature with reduced rate of corrosion.