STABILIZED ZIRCONIA-ALUMINA POWDER FOR SOLID ELECTROLYTE FUEL CELL

摘要

PURPOSE:To form a sintered material by sintering at relatively low temp. such as <=1400 deg.C in flat planer shape end concretely to form a cell structural material by a wet process such as the tape casting method so as to enable to make an electrolyte for the solid electrolyte fuel cell by the co-sintering method. CONSTITUTION:A high purity alumina of <=5wt.% is dispersed into a zirconia stabilized in crystalline structure with an yttria of 8-10mol%. Particle diameter ratio (y) of the stabilized zirconia powder to the alumina powder {(y)=(zirconia particle diameter)/(alumina particle diameter)} is (y)>0.63 and particle diameter of the zirconia powder is $ 0.3mum and particle diameter of the alumina powder is <=0.7mum. Particularly when adding amount of the high purity alumina is 1wt.%, a unique phenomenon is exhibited.