Abstract: A device and to a process for the preparation and charging of starting materials for a glass furnace includes a system for carrying out a mixing of starting material powder and of liquid water producing a moistened mass of starting material powder, to a system for carrying out a mixing of cullet with the moistened mass of starting material powder producing a mixture of starting material and of cullet, known as SM/C mixture, a starting material preheater in which the SM/C mixture circulates and is heated and dried in order to produce a mass to be charged, then a system for charging the glass furnace with the mass to be charged.

Abstract: The present invention relates to a glass-ceramic article at least partly coated with at least one layer of an enamel formed from a glass frit having the following composition, the proportions being expressed as weight percentages: SiO2 50-66% and preferably 50 < SiO2 ? 65% MgO 3-8% and preferably 3-6% Na2O 7-15% K2O ?3% Li2O ?3%, in particular ?2% CaO ?1% BaO >0-15% and preferably 5-15% Al2O3 3-20% and preferably 3 < Al2O3 < 20% ZrO2 0-4%, preferably 0 < ZrO2 < 4%, in particular 0.5-2% ZnO >0-5% B2O3 >0-6% and preferably 0 < B2O3 ? 5% the sum of the alkaline-earth metal oxides CaO+BaO moreover being between 8 and 15%, and the sum of the alkali metal oxides Na2O+K2O+Li2O moreover being between 7 and 20%. The invention also relates to the reinforced glass-ceramics obtained.

Abstract: The present invention relates to a glass-ceramic article at least partly coated with at least one layer of an enamel formed from a glass frit having the following composition, the proportions being expressed as weight percentages: SiO2 50-66% and preferably 50 < SiO2 ? 65% MgO 3-8% and preferably 3-6% Na2O 7-15% K2O ?3% Li2O ?3%, in particular ?2% CaO ?1% BaO >0-15% and preferably 5-15% Al2O3 3-20% and preferably 3 < Al2O3 < 20% ZrO2 0-4%, preferably 0 < ZrO2 < 4%, in particular 0.5-2% ZnO >0-5% B2O3 >0-6% and preferably 0 < B2O3 ? 5% the sum of the alkaline-earth metal oxides CaO+BaO moreover being between 8 and 15%, and the sum of the alkali metal oxides Na2O+K2O+Li2O moreover being between 7 and 20%. The invention also relates to the reinforced glass-ceramics obtained.

Abstract: The invention relates to the preparation of a catalytic composition that comprises a carbonated structuring material (MSC) associated with a catalyst (CAT). The invention comprises mixing a solution of a first solvent (SOL1) including the carbonated structuring material (MSC) and a solution of a second solvent (SOL2) including the catalyst (CAT), and agitating (AGM) the resulting mixture up to the precipitation if the catalyst on the carbonated structuring material. According to one aspect, the catalyst and the structuring material are not soluble in the mixture of the first and second solvents. The composition thus obtained can be used after filtration as a material for an electrode in a fuel cell.