冰冻铸造法制备Al_2O_3多孔陶瓷  

Preparation of Al_2O_3 Porous Ceramics by Freeze-Casting Process

作　　者：何俊升[1] 冯小明[1] 艾桃桃[1] 

机构地区：[1]陕西理工学院材料科学与工程学院,汉中723003

出　　处：《材料导报》2011年第10期103-105,122,共4页Materials Reports

基　　金：陕西高校省级重点实验室科研项目(2010JS040);陕西省教育厅专项科研计划项目(2010JK467)

摘　　要：以冰为造孔模板,采用冰冻铸造法制备了Al2O3多孔陶瓷,借助扫描电镜(SEM)观察了孔结构,并研究了冷冻温度、浆体浓度、烧结温度等工艺对多孔陶瓷显微结构、气孔率和抗压强度的影响。结果表明,可获得层状孔结构的Al2O3陶瓷,且孔结构受冷冻温度和浆体浓度的影响较大。当最大气孔率为80%时,抗压强度为16.1MPa;当最小气孔率为32%时,抗压强度为17.4MPa。Al2O3 porous ceramics were fabricated by freeze-casting process using ice as pore-creating template.The microstructure of the products was investigated by scanning electron microscope（SEM）. The effect of freezing temperature, slurry concentration and sintering temperature on the microstructure, porosity and compressive strength of the products were also studied. The results indicate that the layered structure can be obtained. The structure of Al2O3 porous ceramic is influenced by the freezing temperature and slurry concentration. When the maximum porosity is 80%, the compressive strength is 16.1MPa. When the minimum porosity is 32%, the compressive strength is 17.4 MPa.

关 键 词：冰冻铸造法 多孔陶瓷 气孔率 抗压强度 

分 类 号：TB383[一般工业技术—材料科学与工程] O611[理学—无机化学]