Patent ID: 7226683
Filing Date: 2007-06-05
Classification: G01N

Abstract:
1. A proton conductor comprising a composite oxide glass of phosphorus oxide and oxide of any one metal element selected from the group consisting of lanthanoid elements, Ti, Zr, Hf, Ta, and Ge, said composite oxide glass having hydroxyl groups existing at terminals, said proton conductor exhibiting proton conductivity in accordance with dissociation and migration of H as ions from said hydroxyl groups, wherein said composite oxide glass is a crosslinked and condensed composite of said phosphorus oxide and said oxide of the metal element, and wherein said proton conductor has a chemical shift within −25 ppm, said chemical shift is a difference between a value at which a peak of orthophosphoric acid appears when a silicon oxide-phosphate glass, which is a composite oxide of phosphorus oxide and silicon oxide, each having the same number of moles, is analyzed by P