N-羟甲基丙烯酰胺体系凝胶注模成型氧化铝陶瓷  

Alumina ceramics prepared by aqueous gelcasting with N-methylolacrylamide system

作　　者：李鑫[1] 何真[1] 刘贵山[1] 马铁成[1] 

机构地区：[1]大连轻工业学院化工与材料学院,辽宁大连116034

出　　处：《大连轻工业学院学报》2005年第2期79-83,共5页Journal of Dalian Institute of Light Industry

摘　　要：采用低毒的N 羟甲基丙烯酰胺体系凝胶注模成型氧化铝陶瓷,研究了该体系下浓悬浮体的制备及固化过程。凝胶注模成型要求为:pH≈9,分散剂加入量为占浆料质量分数的0.5%、球磨时间为2h。得到氧化铝固相体积分数为56%,粘度为345.3mPa·s的浆料,单体溶液质量浓度为0.1～0.14g/mL、引发剂加入量占单体质量的2%～3%较适合,既保证成型后的素坯具有一定的强度,又不至于在注模前凝固。成型的坯体强度达到32MPa,可以进行机加工。SEM分析表明所获得的坯体结构均匀,依靠聚合物相互连接使强度较高。The alumina ceramics is gel-mould cast with low toxic N methylolacrylamide system. This paper reports the investigation on the preparation of alumina suspension and its solidification process. It is concluded that the forming condition is follows: pH,9; dispersant fraction in the slurry, 0.5% in mass; ball milling, two hours。The slurry with 56% of solid contents and 345.3?mPa·s in viscosity is obtained. To keep the slurry free from solidifying before casting and to provide machineable strength of 32?MPa after forming, suitable condition for the monomer solution is 0.1-0.14?g/mL and the initiator added is 2%-3% in mass of the monomer solution. SEM analysis indicates that the base material yielded is homogeneous in microscopic structure, with sufficient strength by polymor's joint.

关 键 词：N-羟甲基丙烯酰胺 凝胶注模成型 氧化铝陶瓷 固相体积分数 固化过程 浓悬浮体 质量分数 质量浓度 单体质量 坯体强度 坯体结构 加入量 分散剂 引发剂 机加工 分析表 SEM 浆料 低毒 球磨 素坯 物相 

分 类 号：TQ225.261[化学工程—有机化工] TQ174.62