Yttrium doped barium zirconate-cerate(BaZr0.90-xCexY0.10O3-δ,x=0.09,0.18,0.27,BZCY) powders were synthesized by the conventional solid state reaction route.The x value was optimized to be 0.27 in the composition range.That is to say,the sample with x=0.27 had the best sinterability and conductivity among the three composites. The sintering behavior and electrical conductivity could be further improved by optimizing the addition content of ZnO sintering aid.ZnO was able to form a solid solution with BZCY,res...