| 摘要 |
PURPOSE:To shorten the time required for a temperature rise in time of starting without entailing any cracks on an electrolytic tile as well as to make uniform heating achievable, by mixing a barium titanate system semiconductor containing boron nitride into the fuel cell electrolytic tile and energizing it with a continuous rating current for heating via an external power source. CONSTITUTION:In this method, an external power source 5 is connected, via a heat resisting covered wire 4, to each of current taking terminals 3 connected to both top and bottom sides of end plates 2 of a fuel cell layer body 1 which is molded after mixing more than 5wt% of a barium titanate system semiconductor containing boron nitride by 0.5-1.0wt% into an electrolyte holding body (LiAlO2 by way of example) as an electrolytic tile available for a fused carbonate fuel cell. The electrolytic tile is energized with an AC current of 30mA/ cm<2> up to a temperature of about 150 deg.C from 120 deg.C, a curie point of the electrolytic tile, starting from the ordinary temperature and, from 150 deg.C onward the current is gradually decreased while from 150 deg.C onward where specific resistance shows the maximum it is slowly heated with an AC current of 0.4mA/cm<2>. According to this method, a temperature rise of up to the operating temperature is attainable with about seven hours long, so that no cracks on the electrolytic tile will occur owing to two-step qucik-and-slow heating processes. |
