【摘要】 本文比较了几种制备方法及Y₂O₃含量对ZrO₂材料性能的影响,提出了ZrO₂立方相的稳定机理。结果发现,在相同Y₂O₃含量条件下,不同制备方法制得的粉末其晶相中ZrO₂立方相体积分数有较大差异。随Y₂O₃含量的增加,粉末晶相中立方相体积分数迅速增大,其立方相晶胞参数逐渐增加,而当Y₂O₃含量增加到9mol%时,晶胞参数反过来又减小。SEM照片表明,随Y₂O₃含量的增加。ZrO₂粉末颗粒逐渐增大,Y₂O₃含量大于6mol%时,ZrO₂粉末形状变得较不均匀规整。Y₂O₃含量较低时,ZrO₂粉末才具有较好的烧結性能。更多还原

【Abstract】 In this paper,we compared the effects of preparation methods and the content of Y₂O₃ on the properties of ZrO₂ powder, and proposed the mechanism of cubic phase stabilization.The results indicate that, at the same Y₂O₃ content, the volumetric fraction of cubic phase in crystal differed from the methods of ZrO₂ powders preparation.As Y₂O₃ content increases,the volumefric frcation of cubio phase in powder crystal increases rapidly, and the cubic unit cell parameter of powder increases but decreases when Y₂O₃ content increases to 9mol%. SEM photograph indicates that, the grain size of the powder increases with the increasing of Y₂O₃ content in ZrO₂ powder, and the powder containing low Y₂O₃ content has good sintering property, while Y₂O₃ content increases o or above 6mol% the powder has bad sintering compactness.更多还原