Abstract: A spark plug having a ceramic insulator, which contains a precious-metal center electrode in a cylindrical, axial opening, at the end on the side of the combustion chamber. A contact pin is arranged in the cylindrical opening, downstream from the precious-metal center electrode, in the direction of the insulator end away from the combustion chamber. To reduce corrosion, the surface of the contact pin is provided with a layer of one or more metal aluminides.

Abstract: A heating conductor, in particular for a sensor for determining at least one gas component in the exhaust gases of internal combustion engines. The heating conductor formed from a cermet which contains platinum, at least one metal oxide, and at least two further precious metals. A method for manufacturing the heating conductor by applying a paste containing a platinum powder, a metal oxide powder, and at least two further precious metals, to a ceramic foil and sintering the paste and ceramic foil combination.

Abstract: A spark plug for an internal combustion engine is proposed, having at least two electrodes (9, 11), one of which at least two electrodes is at least one middle electrode (11) and another electrode of the at least two electrodes is at least one ground electrode (9), and between the at least one ground electrode (9) and the at least one middle electrode (11), a spark gap (13) is formed. Each of the at least two electrodes (9, 11) has an electrode base body (93, 113). At least one electrode has a region (95, 115) that is highly resistant to electrode erosion and that forms at least a part of the end face, oriented toward the spark gap, of the electrode (97, 117). The highly electrode-erosion-resistant-region (95, 115) comprises an alloy which has at least the elements iridium and nickel.