Abstract: The present invention relates to a system and a method for cleaving water by means of hyperpolarisation, the system comprising a first electrode and at least one additional electrode; at least one porous ferroelectric layer arranged between the first and the additional electrode; as well as an AC voltage or pulsed DC voltage source. With the method according to the present invention it is possible to cleave the water economically into hydrogen and oxygen and obtain gases for technical purposes.
Abstract: The aim of the invention is the application of simple production methods for electrical resistance heating elements with a honeycomb body and use total capacity with regard to the specific electrical power per volume unit. Said aim is achieved for an electrical resistance heating element with a honeycomb body of resistance material with positive temperature coefficients for the resistance (PTC resistance), in which the channels, for throughflow of a medium for heating, comprise metallised walls and are electrically alternately contacted after the fashion of a chess-board on the front faces of the honeycomb body by means of a front face metallisation, whereby an insulation region (1) is alternately let into the metallisation (3) on the walls of the channels running from the front faces, whilst the front face metallisation (2) completely covers the front faces.