Surface renewable iridium oxide-glass or ceramic composite hydrogen ion electrode

A surface renewable iridium oxide-glass or ceramic composite hydrogen ion electrode comprising a hydrogen ion sensor whose surface can be renewed by simple grinding,

• wherein the hydrogen ion sensor is formed by the steps of:
• a first step of forming an inactive conductive material on a surface of high-temperature sinterable glass fine powder, ceramic powder or ceramic precursor powder;
• a second step of preparing high-temperature sinterable glass fine powder, ceramic powder or ceramic precursor powder, including metal/iridium oxides or iridium oxides alone, by dispersing the high-temperature sinterable glass fine powder, ceramic powder or ceramic precursor powder coated on the surface thereof with the inactive conductive material formed in the first step or high-temperature sinterable glass fine powder, ceramic powder or ceramic precursor powder in an iridium and metal containing compound solution, evaporating and drying a solvent from the solution, thus applying the iridium compound on the surface of glass fine powder, ceramic powder or ceramic precursor powder, and then pyrolyzing compounds applied at below the sintering temperature;
• and
• a third step of molding the high-temperature sinterable glass fine powder, ceramic powder or ceramic precursor powder, including metal/iridium oxides or iridium oxides alone, and then high-temperature sintering or high-temperature high-pressure sintering the molded glass fine powder, ceramic powder or ceramic precursor powder.