低含量ZrO_2与MgO对Ce-TZP/Al_2O_3纳米复合陶瓷强度的影响  

Effect of Low Content ZrO_2 and MgO upon the Strength of Ce-TZP/Al_2O_3 nanocomposite ceramics

作　　者：王坤[1] 张垠[1] 艾佳楠[1] 洪重荣[1] 王定改[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：《中国陶瓷》2013年第6期16-19,共4页China Ceramics

基　　金：江苏高校优势学科建设工程资助项目

摘　　要：采用共沉淀法制备Ce-TZP(CeO2稳定四方ZrO2)凝胶,并与纳米α-Al2O3混合,将ZrO2体积分数含量分别为5,10,15,20,25%的凝胶在700℃热处理,得到Ce-TZP/Al2O3纳米复合粉体,用XRD对复合粉体进行了晶相分析。在1600℃烧结,得到Ce-TZP/Al2O3纳米复合陶瓷,对纳米复合陶瓷进行了三点弯曲强度测试。研究发现,当Ce-TZP体积分数含量为20%,MgO质量分数含量为0.1%时,Ce-TZP/Al2O3纳米复合陶瓷的弯曲强度达到580 MPa。并采用阿基米德法测量其相对密度,以及XRD分析其相组成和SEM观察其微观结构。Ce-TZP （CeO2 stable tetragonal ZrO2） gel was prepared by using coprecipitation method mixed with nano- alumina, the gel with 5, 10, 15, 20, 25vo1% zirconia was sintered at 700 ℃ , then obtain Ce-TZP/Al2O3 nano-composite powder. The crystalline phase of composite powders were analyzed by XRD. Ce-TZP/Al2O3 nano-composite ceramic were generated when the green powers were sintered at 1600℃ . The three-point bending strength of nano-composite ceramic were evaluated.The results showed that, when the content of Ce-TZP was 20vo1%, and the MgO content was 0.1wt% , the bending strength of Ce-TZP/Al203 nano composite ceramics was 580 MPa. Using the Archimedes＇ method to measure the relative density, XRD analysis of the phase composition and the SEM observation of the microscopic structure.

关 键 词：共沉淀 CE-TZP Al2O3纳米复合陶瓷 MgO助烧剂 弯曲强度 

分 类 号：TQ174.758.22[化学工程—陶瓷工业]