Abstract: Method for producing a resistive heating element by coating a substrate with an electrically insulating material from the gaseous phase, depositing an electrically conducting material from the gaseous phase onto the layer of insulating material deposited onto the substrate, wherein the layer of conducting material deposited onto the layer of insulating material is subsequently partially mechanically removed thereby forming at least one conductor path. The substrate is machined before depositing the insulating material thereby forming at least one recess provided for receiving the conductor path. The layers of insulating material and conducting material are deposited onto the mechanically processed substrate. Finally, the layer of conducting material is evenly removed until at least the conducting material has been completely removed from the elevated regions of the substrate delimiting the recess of the conductor path, thereby forming the conductor path.

Abstract: Method for producing a resistive heating element by coating a substrate with an electrically insulating material from the gaseous phase, depositing an electrically conducting material from the gaseous phase onto the layer of insulating material deposited onto the substrate, wherein the layer of conducting material deposited onto the layer of insulating material is subsequently partially mechanically removed thereby forming at least one conductor path. The substrate is machined before depositing the insulating material thereby forming at least one recess provided for receiving the conductor path. The layers of insulating material and conducting material are deposited onto the mechanically processed substrate. Finally, the layer of conducting material is evenly removed until at least the conducting material has been completely removed from the elevated regions of the substrate delimiting the recess of the conductor path, thereby forming the conductor path.

Abstract: The invention concerns a piston of finest grain carbon, having a bending strength of at least 100 MPa, a bending elongation >0.8%, an average interlayer distance c/2<0.35 nm, an average crystallite size in the c direction >5 nm and a heat conductivity of at least 10 W/mK, and a method for its production comprising: a) compacting of a polyaromatic mesophase powder to almost its final shape; b) heating of the green product at ambient pressure under a non-oxidizing atmosphere to a temperature of between 900 to 1300° C. and maintenance at this temperature; c) high-temperature treatment, thereby heating up to a temperature between 1400 and 2400° C.

Abstract: A method for isothermic, isobaric chemical vapor infiltration (CVI) of refractory substances, especially of carbon (C) and silicon carbide (SiC), based on diffusion in a porous structure, whereby the pressure of the gas or partial pressure of an educt gas contained in the gas and the dwell time of the gas in the reaction zone are set at a given temperature in the reaction zone so that a deposition reaction occurs in the porous structure in the area of pressure or partial pressure of the saturation adsorption of the gaseous compounds forming the solid phase, saturation adsorption meaning that the deposition speed remains substantially constant at increased pressure of the gas or partial pressure of the educt gas. The reaction of the educt gas is limited in such a way that no more than 50% of the elements in the educt gas as it flows through the reaction zone are deposited as a solid phase in the porous structure.

Abstract: The invention concerns a resistance-heated vaporizer boat for vaporizing metal. According to the invention, a reduced temperature is generated in the edge region, i.e., along the longitudinal edge of the vaporizer boat, such that there is only a very slight wetting tendency along this longitudinal edge. Consequently, the melt can be localized such that it cannot overflow over the longitudinal edges of the vaporizer boat, without a cavity necessarily having to be provided in the vaporization surface of the vaporizer boat. As a result, optimum wetting and constantly targeted vaporization of the metal upwards towards the area to be vapor-deposited are attained.