Abstract: The invention relates to an electrode assembly for the electrochemical treatment of liquids with a low conductivity. Said assembly comprises electrodes (1, 2), between which a polymer solid electrolyte (3) is situated. The electrodes are pressed against one another by means of a compression device (9, 10; 91) and are configured in such a way that the assembly can be traversed by the liquid To produce said assembly simply and to ensure that it is flexible and easy to use, the compression device (9, 10; 91) is supported on the electrodes (1, 2).

Abstract: In a method for the treatment of an object made of silicon or an inorganic, optionally organically modified, silicon compound, an oxidizing agent is prepared by electrolysis of an aqueous solution in an electrolysis device. The anode of the electrolysis device is a silicon electrode. The anode has an overvoltage for oxygen so that upon electrolysis of water the formation of hydrogen peroxide is preferred over that of oxygen. The aqueous solution used in electrolysis contains at least one reactive component or a constituent that is converted by electrolysis of the solution into a reactive component. The object to be treated is contacted with the freshly prepared oxidizing agent. The oxidizing agent is circulated and returned into the electrolysis device to be regenerated.

Abstract: A gemstone is provided and has a large surface-area, plate-shaped support having a surface with least one pyramid-shaped depression. A thin vapor phase deposit layer comprises a thin, surface-shaped precious synthetic gemstone layer disposed on the large surface-area, plate-shaped support and has an upper surface facing away from the plate-shaped support and an underside having at least one pyramid-shaped projection disposed in and coinciding with the pyramid-shaped depression of the support. Side faces of the pyramid-shaped projections of the underside of the vapor phase deposit layer upon the plate-shaped support impart decorative, diamond-light-reflective qualities to the synthetic gemstone layer.

Abstract: In an apparatus for coating a substrate by means of a chemical gas phase separation process, the arrangement of the filaments (5, 17, 26) at least partially surrounding the substrate to be coated is not merely two-dimensional but three-dimensional in respect of the substrate.

Abstract: In an apparatus for coating a substrate by means of a chemical gas phase separation process, the arrangement of the filaments (5, 17, 26) at least partially surrounding the substrate to be coated is not merely two-dimensional but three-dimensional in respect of the substrate.

Abstract: A gemstone has a plate-shaped support having a surface with at least one pyramid-shaped depression. A precious stone layer is produced by vapor phase deposition on the plate-shaped support. The precious stone layer can be cut.

Abstract: In a method for the manufacture of a coating on a grinding tool, a rough diamond layer (8, 10) is produced as an abrasive layer on the surface (2) of the body (1) of the grinding tool by vapor-phase deposition. This diamond layer is deposited on the grinding tool by the Hot Filament Chemical Vapor Deposition (HF-CVD) process.