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中文摘要：
采用3种不同形貌的Al2O3原料对注凝成型制备ZrO2/Al2O3（ZTA）陶瓷工艺中悬浮体的流变性能进行了研究。以低毒的单体N,N-二甲基丙烯酰胺（DMAA）制备了ZrO2/Al2O3坯体和陶瓷。讨论了3种不同形貌的Al2O3原浆料的分散剂用量、球磨时间和固含量对浆料流变性的影响。Al2O3粉体呈扁平状有利于降低浆料的黏度,Al2O3粉体呈棒状对生坯强度的提高有利。制得的3种ZrO2/Al2O3坯体颗粒间结合紧密,抗弯强度分别达到21.45,19.87,25.90MPa。Al2O3粉体呈颗粒状有利于最终陶瓷力学性能的提高,陶瓷的抗弯强度及断裂韧性分别为680MPa和7.49MPa·m1/2,453.1MPa和6.8MPa·m1/2,549.4MPa和6.34MPa·m1/2。
英文摘要：
The rheological behaviors of the ZrO2/Al2O3（ZTA）suspension were investigated using three kinds of Al2O3 with different particle morphology.ZrO2/Al2O3 green bodies and ceramics were prepared by using a low-toxicity monomer N,N-dimethyl acrylamide（DMAA）as gelling agent.The effect of dispersant dosage,milling time and solid loading on the rheological properties of suspension were discussed.Tabular Al2O3 powders have good effect on decreasing viscosity of slurries and clubbed Al2O3powders are good for flexural strength of green bodies.The particles in ZrO2/Al2O3 green bodies are combined closely and their bending strength can reach 21.45,19.87,25.90MPa,respectively.Granular Al2O3powders are beneficial properties of sintered ceramics,and the mean bending strength and fracture toughness of sintered ceramics are 680MPa and 7.49 MPa·m1/2,453.1 MPa and6.8MPa·m1/2,549.4MPa and 6.34MPa·m1/2.
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