| abstract |
(57) [Problem] To provide a phosphosilicate gel, a proton conductive material, and a method for producing the same, which have excellent proton conductivity and do not decrease in proton conductivity even in a high-temperature dry atmosphere. In a 31 P MAS-NMR spectrum obtained by using an 85% H 3 PO 4 solution as a standard at a measurement frequency of 121.419 MHz and a rotation speed of about 5000 Hz, 0 pp m and around -11 ppm, or 0 ppm and -11 pp A phosphosilicate gel having peaks in the vicinity of m and in the vicinity of -44 to -52 ppm, and a proton conductive material comprising the phosphosilicate gel. Phosphoric acid is added to and mixed with tetraalkoxysilane in the presence of water containing an acidic condensation catalyst to prepare a sol, and the resulting sol is gelled and heat-treated to obtain the above phosphosilicate gel. |