Abstract: A method of producing an ion sensitive working electrode for a heavy metal ion sensor, the ion sensitive working electrode including a mixture of Ag.sub.2 S and MeS in which Me represents a heavy metal to be determined in a solution to be measured, the method including applying a conductive layer onto a substrate using at least one thick-film technique selected from the group consisting essentially of screen printing and film casting; applying a layer comprised of a plurality of juxtaposed sections on top of the conductive layer, each section of the plurality of juxtaposed sections being comprised of a mixture of Ag.sub.

Abstract: An electrochromic system. It comprises layers of solid/materials deposited on glass or another substrate. The solids function in an atmosphere that can be dry. One layer is preferably Li.sub.3 AlF.sub.6 and conducts positive lithium ions. Another layer is a counterelectrode. The counterelectrode is improved to the extent that it can reversibly accept ions from and donate them to the ion conductor while remaining extensively transparent. The counterelectrode can be Li.sub.x TiO.sub.y, (Li.sub.2 O).sub.m (WO.sub.3).sub.n (Sb.sub.2 O.sub.3), or (Li.sub.2 O).sub.m (WO.sub.3).sub.n (CeO.sub.2).sub.o.

Abstract: A catalyst for the elimination of toxic substances in exhaust gases from combustion systems and internal combustion engines, having at least one layer of catalyst material, includes a catalyst material formed by at least one mixed oxide system, which has unsaturated ions on its surface that effect charge transfer processes. A method for manufacturing such a catalyst includes grinding dry carbonates or oxides of lanthanum, manganese, iron, copper and strontium in a defined ratio by weight for at least one hour, and sintering the powder mixture thus formed at 1300.degree. C. for forming the perovskite structure or the perovskite and spinel structure.

Abstract: A catalyst is used for removing toxic substances from the exhaust gases of combustion installations and internal combustion engines, by reduction with carbon monoxide, hydrogen, hydrocarbons or ammonia. The catalyst is produced using a single-phase or multi-phase mixed oxide system with a pure perovskite structure or a perovskite and spinel structure. To produce the catalyst, carbonates or oxides of lanthanum, strontium, manganese, iron and copper are mixed, crushed, dried and ground to a fine powder with a particle size between 0.1 and 5 microns. This powder is then processed to form a catalytically active layer.

Abstract: A high-temperature protective coating comprising a ceramic material, in particular for structural components of super-alloys, characterized in that at least one oxide of a metal of subcolumn 4 of the periodic table of elements is stabilized with at least one further oxide of a metal and is enveloped in a corrosion-resistant manner, at least in some regions, by at least one ceramic material.

Abstract: A high-temperature shielding coating for structural elements, in particular elements made of an austenitic material, characterized by the metallic mixed oxide system having a perovskite structure and the chemical formula:A.sub.1-x B.sub.x MO.sub.3wherein A is a metal from secondary group III, B a metal from primary group II and M a metal from secondary group VI, VII or VIII of the periodic table of chemical elements, and the stoichiometric factor x has a vlaue between 0 and 0.8.