超细ZrO2室温凝胶注模成型研究  

Gelcasting of ultrafine ZrO_2at room temperature

作　　者：王金锋[1] 谢志鹏[2] 孙加林[3] 

机构地区：[1]河北理工大学轻工学院,河北唐山063020 [2]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084 [3]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料科学与工艺》2008年第2期180-183,共4页Materials Science and Technology

基　　金：国家重点基础研究发展规划资助项目(G2000067204-01)

摘　　要：为了探讨凝胶注模成型工艺在超细粉体领域的应用,研究了超细ZrO2粉体室温下的凝胶过程.通过记录凝胶过程中料浆温度的变化,采用扫描电镜观察坯体显微组织结构,并检测材料强度等方法,研究了去离子水/单体/交联剂的比例及引发剂和催化剂用量对超细ZrO2室温凝胶过程的影响.研究表明:去离子水/单体/交联剂比例(质量比)以100/15/1为宜,此时可形成稳定的网络结构;调整引发剂和催化剂的用量及比例,可以控制料浆的停留时间和聚合反应时间,在预混液/引发剂/催化剂比例(体积比)为100/1/0.5时,停留时间和聚合反应时间分别为20min和28min;超细ZrO2粉体凝胶注模成型工艺可以在室温下进行.Gelation process of uhrafine ZrO2 slurry at room temperature was studied to probe into application of geleasting in ultrafine powder fields. The effects of deionized water/monomer/cross linker ratio and the addition of initiator and catalyst on the gelation process of uhrafine ZrO2 slurry were studied at room temperature through observing the change of slurry temperature in gelling and the variation of material strength process, the microstructure of gelcasted bodies . It is proved that a stable network is formed at deionized water/monomer/ cross linker ratio of 100/15/1 （ by weight）. The idle time and reaction time can be controlled via adjusting initiator and catalyst. When the premixed solution/initiator/catalyst ratio is 100/1/0. 5 （by volume）, the idle time and reaction time are 20 minutes and 28 minutes respectively. Gelcasting of ultrafine ZrO2 slurry can be carried out at room temperature.

关 键 词：超细ZrO2 凝胶注模成型 室温 

分 类 号：TQ174[化学工程—陶瓷工业]