高强度光滑钛酸铝陶瓷凝胶注模成型的工艺研究  

Study on Gelcasting Process of High Strength and Smooth Aluminum Titanate Ceramics

作　　者：曹文 谭训彦 夏光华 徐玉欣 蔡呈伟 

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,景德镇333403

出　　处：《中国陶瓷》2016年第11期67-71,共5页China Ceramics

基　　金：景德镇陶瓷大学博士科研启动基金

摘　　要：以N-羟甲基丙烯酰胺(N-MA)为单体,N,N-亚甲基双丙烯酰胺(MBAM)为交联剂,聚丙烯酸钠(PAAS2000)为分散剂,交联淀粉为防护剂,过硫酸铵(APS)和亚硫酸铵(ASF)为氧化还原体系引发剂,考察了N-MA与MBAM配比、APS与ASF配比及固化温度对钛酸铝料浆的固化时间和坯体抗折强度的影响,验证了防护剂的有无对坯体表面平整度的影响。研究表明,料浆粘度几乎不随N-MA与MBAM配比及APS与ASF配比的变化而变化。当N-MA与MBAM配比适宜时,若APS与ASF的比值愈大,固化温度愈高,则钛酸铝料浆固化所需的时间愈短,坯体的抗折强度愈高。以交联淀粉作防护剂,能有效防止钛酸铝坯体在固化时因氧阻聚而产生的起皮现象。Using N-methyloi acrylamide （N-MA） as the monomer, N, N-methylenebisacrylamide （MBAM） as the crosslinking agent, sodium polyacrylate （PAAS2000） as the dispersing agent, cross-linked starch as the protective agent, and redox system of ammonium sulfate （APS） and ammounium sulfite （ASF） as the initiator, the influences of the mass ratio of N-MA and MBAM, the mass ratio of APS and ASF and the curing temperature on the curing time of aluminum titanate slurry and the rupture strength of green bodies were investigated. Then, the influence of the presence or absence of the protective agent on the surface smoothness of green bodies was verified. The result shows that the slurry viscosity almost dose not change with the change of the mass ratio of N-MA and MBAM and the mass ratio of APS and ASF. When the mass ratio of N-MA and MBAM is appropriate, the greater the ratio of APS and ASF is, the higher the curing temperature is, so the shorter the curing time of aluminum titanate slurry is, and the higher the rupture strength of green bodies is. Using cross-linked starch as the protective agent, the green bodies of aluminum titanate from peeling phenomenon can be elfectively prevented caused by oxygen inhibition when curing period.

关 键 词：钛酸铝 凝胶注模成型 工艺 陶瓷 高强度 光滑 

分 类 号：TQ174.62[化学工程—陶瓷工业]