The characteristics of synthesized potassium hexatitanate and the manufacturing process of the matrix

摘要

The characteristics of synthesized potassium hexatitanate (K_2O · 6TiO_2) and the manufacturing process of the matrix for an alkaline fuel cell were studied. Potassium hexatitanate was synthesized by sintering a mixture of K_2CO_3 and TiO_2 at 850℃, and the thin film type matrix was manufactured with polytetrafluoroethylene (PTFE) as the binder. The highest wettability, 50%, was obtained for the matrix manufactured using 12 h ball-milled powder containing 10 wt.% PTFE, and it also showed good mechanical properties. The matrix made using K_2O · 6TiO_2 whiskers showed 165% wettability. The wettability, bubble pressure and porosity of the matrix made using a 1:2 powder:whisker mixture were 140%, 220 mmHg and 62%, respectively.