DMAA凝胶体系注凝成型超细氧化锆陶瓷凝胶固化工艺的研究  

Study on Gelation Process of Gelcasting for Superfine Zirconia Using DMAA Gel System

作　　者：许海仙[1] 杨建[1] 冯永宝[1] 丘泰[1] 

机构地区：[1]南京工业大学材料科学与工程学院,南京210009

出　　处：《人工晶体学报》2011年第4期1053-1058,共6页Journal of Synthetic Crystals

基　　金：江苏省高技术研究计划项目(BG2002025)

摘　　要：研究了真空脱泡时间、引发剂、单体、交联剂与单体比、固化温度和固相量对低毒的DMAA单体凝胶固化和ZrO2生坯性能的影响。制备了表面光洁、不起皮、不开裂及形状复杂的生坯。在单体浓度为15%,交联剂与单体比为1∶50,引发剂添加量为1%,固化温度为60℃的条件下,采用固相量为52vol%的浆料制备的生坯抗弯强度接近30 MPa,可直接对其进行机械加工。压汞及SEM分析表明:生坯结构均匀,无团聚体及颗粒簇出现,孔径呈较窄的单峰分布,气孔率低(26%),孔径小(最可几孔径为36 nm)。The effects of vacuum degassing time,initiator,monomer,crosslinker/monomer,gelation temperature and solid content on gelation process of low-toxicity DMAA monomer as well as the properties of green bodies were studied.Complex shape green bodies with smooth surface,without cracking and exfoliation were successfully prepared.When the amount of monomer is 15%,the crosslinker/monomer is 1∶50,the addition of initiator is 1% and the temperature is 60 ℃,the green bodies prepared by 52vol% slurry show a bending strength close to 30 MPa,which can be directly machined.Mercury porosimetry and SEM indicate that the green bodies have homogeneous microstructure,without aggregation and particle-clusters.In addition,ideal pore structure with low porosity（26%）,small pore size（the most concentrative pore diameter is 36 nm）,narrow and unimodal pore size distribution of green bodies are observed.

关 键 词：超细ZrO2 注凝成型 低毒单体 孔结构 

分 类 号：TQ174[化学工程—陶瓷工业]