网眼陶瓷凝胶成型工艺条件研究  

Preparation of Reticulated Ceramics by Gelcasting

作　　者：周竹发[1] 王淑梅[1] 吴铭敏[1] 

机构地区：[1]苏州大学材料工程学院,苏州215021

出　　处：《无机材料学报》2008年第1期203-208,共6页Journal of Inorganic Materials

摘　　要：以α-Al_2O_3为主原料制备凝胶注模浆料,采用浸渍工艺制备了均匀性好、强度高的网眼陶瓷材料.研究了固相含量、分散剂与pH值等对Al_2O_3浆料流变特性的影响.实验表明:在pH=9、分散剂添加量为0.5wt%及固相体积分数为57%时,可以获得良好流动性(粘度为140mPa·s)的浆料;研究了聚氨酯泡沫塑料载体表面改性对浆料吸附力的作用,采用氩等离子体处理并在丙烯酸溶液中接枝反应使聚氨酯泡沫塑料有效吸附浆料量从0.42g/cm^3提高到0.71g/cm^3.制备出气孔率为86%、体积密度为0.52g/cm^3、耐压强度为3.60MPa和均匀无盲孔的Al_2O_3泡沫陶瓷材料.The uniform and high intensity reticulated ceramics were fabricated with α-Al2O3 slurry by gel casting injection. The influences of solids volume fractions, dispersant and pH values on the rheological behavior of α-Al2O3 reticulated ceramics were studied. Results show that when pH=9, dispersant-0.5wt%, solid volume fraction--57%, the slurry has a good fluidity, and its viscosity is 140mPa.s. By adopting the argon plasma treating process and the stem grafting of acrylic acid, the absorbed slurry values of the foaming plastics will be changed from 0.42g/cm^3 to 0.71g/cm^3. The reticulated ceramics fabricated have apparent porosity of 86%, volume density of 0.52g/cm^3, and compressive strength of 3.60MPa.

关 键 词：网眼陶瓷 凝胶成型 浆料流变性 

分 类 号：TQ174.758[化学工程—陶瓷工业]