An electronically conductive enamel composition consisting of or comprising (i) an enamel matrix melting at a temperature in the range from 600°C to 900°C and (ii) particles, embedded in the enamel matrix, of one or more electronically conductive materials, which are not noble metals, wherein the particles (ii) - have a particle size of 700 μm or smaller, preferably 300 μm or smaller, more preferably 150 μm or smaller, still more preferably 100 μm or smaller, particularly preferably 38 μm or smaller, obtainable by sieving, - and are selected from the group consisting of (a) particles of carbon-based electronically conductive materials, (b) particles of other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals, and (c) particles made up of a combination of carbon-based electronically conductive materials and other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals; and the total concentration of the particles (ii) is in the range from 0.09 vol.% to 67.8 vol.%, preferably in the range from 0.18 vol.% to 67.8 vol.%, more preferably in the range from 1.9 vol.% to 55.2 vol.%, particularly preferably in the range from 3.0 vol.% to 44.2 vol.%, based on the sum of the volumes of the enamel matrix (i) and the particles (ii), wherein the total concentration of particles (a) of carbon-based electronically conductive materials is 48 vol.% or less, based on the sum of the volumes of the enamel matrix (i) and the particles (a). (i) an enamel matrix melting at a temperature in the range from 600°C to 900°C and (ii) particles, embedded in the enamel matrix, of one or more electronically conductive materials, which are not noble metals, wherein the particles (ii) - have a particle size of 700 μm or smaller, preferably 300 μm or smaller, more preferably 150 μm or smaller, still more preferably 100 μm or smaller, particularly preferably 38 μm or smaller, obtainable by sieving, - and are selected from the group consisting of (a) particles of carbon-based electronically conductive materials, (b) particles of other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals, and (c) particles made up of a combination of carbon-based electronically conductive materials and other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals; and the total concentration of the particles (ii) is in the range from 0.09 vol.% to 67.8 vol.%, preferably in the range from 0.18 vol.% to 67.8 vol.%, more preferably in the range from 1.9 vol.% to 55.2 vol.%, particularly preferably in the range from 3.0 vol.% to 44.2 vol.%, based on the sum of the volumes of the enamel matrix (i) and the particles (ii), wherein the total concentration of particles (a) of carbon-based electronically conductive materials is 48 vol.% or less, based on the sum of the volumes of the enamel matrix (i) and the particles (a). - have a particle size of 700 μm or smaller, preferably 300 μm or smaller, more preferably 150 μm or smaller, still more preferably 100 μm or smaller, particularly preferably 38 μm or smaller, obtainable by sieving, - and are selected from the group consisting of (a) particles of carbon-based electronically conductive materials, (b) particles of other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals, and (c) particles made up of a combination of carbon-based electronically conductive materials and other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals; and the total concentration of the particles (ii) is in the range from 0.09 vol.% to 67.8 vol.%, preferably in the range from 0.18 vol.% to 67.8 vol.%, more preferably in the range from 1.9 vol.% to 55.2 vol.%, particularly preferably in the range from 3.0 vol.% to 44.2 vol.%, based on the sum of the volumes of the enamel matrix (i) and the particles (ii), wherein the total concentration of particles (a) of carbon-based electronically conductive materials is 48 vol.% or less, based on the sum of the volumes of the enamel matrix (i) and the particles (a). (a) particles of carbon-based electronically conductive materials, (b) particles of other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals, and (c) particles made up of a combination of carbon-based electronically conductive materials and other electronically conductive materials selected from the group of metallic electronically conductive materials, which are not noble metals;