研究了喷雾造粒粉末ZrO2(Y2O3)的烧结行为.在坯体烧结过程中形成的新团聚体主要由500℃之前的升温速度所决定,当升温速度大于2.5℃/min时,造粒粉中有机物燃烧放出的热量将导致颗粒间的紧密粘连,形成团聚体.新生团聚体将影响整个烧结过程,实验结果表明:新生团聚体不仅阻碍烧结,同时使坯体的烧结方式发生了变化.即在较低密度下,烧结体的致密化速率大幅度减小,而主要呈现为以晶粒长大为主的烧结,致使坯体内部气孔难以消除,并且出现晶粒异常长大.通过研究烧结行为,获得了致密烧结、结构均匀氧化锆陶瓷的烧成曲线.
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