NOVELTY - Synthesizing a sealing glass by sol-gel process comprises (a) forming (E1) a solution by dissolving a silicon alkoxide in a solvent; (b) hydrolysis of (E2) the silicon alkoxide in the solution to form a monomer and/or an inorganic oligomer; (c) adding an alumina precursor, a barium oxide precursor, a calcium oxide precursor, a boron oxide precursor, a magnesium oxide precursor, water and acid in the solution; (d) agitating and condensating (E4) the mixture; (e) pulverizing (E5) the xerogel to obtain an oxide powder; and (f) glass elaboration of (E6) the oxide powder.    USE - The method is useful for synthesizing a sealing glass by sol-gel process, where the sealing glass is useful for isolating anode and cathode compartments of a fuel cell or a high temperature electrolyzer (all claimed).    ADVANTAGE - The method is capable of simply and economically synthesizing the sealing glass with good mechanical properties and reduced energy consumption thus preventing the contact between the oxidant and the combustible material. The glass provides electrically resistive sealing and chemical stability to the other materials such as steel of the fuel cell.    DETAILED DESCRIPTION - Synthesizing a sealing glass by sol-gel process comprises (a) forming (E1) a solution by dissolving a silicon alkoxide in a solvent; (b) hydrolysis of (E2) the silicon alkoxide in the solution to form a monomer and/or an inorganic oligomer; (c) adding an alumina precursor, a barium oxide precursor, a calcium oxide precursor, a boron oxide precursor, a magnesium oxide precursor, water and acid in the solution to form a mixture with the silicon alkoxide; (d) agitating and condensating (E4) the mixture to form a xerogel; (e) pulverizing (E5) the xerogel to obtain an oxide powder; and (f) glass elaboration of (E6) the oxide powder to obtain sealing glass. INDEPENDENT CLAIMS are included for:    (1) the glass comprising metal oxide of formula ((BaO)u(Al2O3)v(CaO)w(SiO2)x(B2O3)y(MgO)z); and    (2) a fuel cell or a high temperature electrolyzer including series of anode compartments, series of cathode compartments, and series of joints, where the anode and cathode compartments are alternated and stacked, and the joints are made of glass.    u = 0.3-0.4;    v = 0.015-0.035; and    w, y, z = 0.05-0.15.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of a method for synthesizing a sealing glass by sol-gel process (Drawing includes non-English language text).    Forming a solution by dissolving a silicon alkoxide in a solvent (E1)    Hydrolysis of the silicon alkoxide in the solution to form a monomer and/or an inorganic oligomer (E2)    Agitating and condensating the mixture to form a xerogel (E4)    Pulverizing the xerogel to obtain an oxide powder (E5)    Glass elaboration of the oxide powder to obtain sealing glass. (E6)