DING Xiang, LI Jinyou, YANG Zhengfang
（Tianjin University）
Abstract: The green compact properties of ZrO2 spray－dried powder are studied by means of pressure－density compaction curves of powder and SEM photographs．It is found that granule size distribution of spray－dried powder has a smaller effect on green compact density．Granule yield strengthwhich depends on the dimension of granule and the relative humidity in the environment is a critical factor influencing the uniforming of green compact microstructure．Thereforeplasticization of granule and elimination of larger granule can improve the microstructure of green compact．
Keywords: ZrO2 spray－dried powdergreen compact propertiesgranule size distributionrelative humidity in the environment